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Shah U, Rathore C, Radhakrishnan K, Baheti N, Kadaba S, Sahu A, Alladi S, Chitnis S, George A, Bansal AR, Murthy JMK. A survey of the prevalence and patterns of neuropsychological assessment practices across epilepsy surgery centers in India: Toward establishing a national guideline. Epilepsia Open 2024. [PMID: 39012159 DOI: 10.1002/epi4.13005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Revised: 06/21/2024] [Accepted: 06/23/2024] [Indexed: 07/17/2024] Open
Abstract
Neuropsychology plays an important role in optimizing epilepsy management, but there are no practice guidelines for low- and middle-income countries with emerging services. The National Epilepsy Surgery Support Activity Network (NESSAN), a national working group that supports and optimizes epilepsy surgery programs in India, explored the present status of pre- and post epilepsy surgery neuropsychological assessment practices across India as an initial step in developing national evidence-based test guidelines. An online survey was conducted using two questionnaires, one for neurologists and the second for neuropsychologists and speech-language pathologists working in epilepsy surgery centers. The questions to neurologists covered the setting, description, and nature of the neuropsychology services provided for adults and children as part of the epilepsy surgery program, and their perceptions about the importance and indications for neuropsychological assessment in epilepsy surgery. The questions to neuropsychologists inquired about their qualifications and training, pre- and postsurgical assessment procedures, and domain-specific cognitive tests and scales for mood, quality of life, and language evaluations. Forty-three centers responded, and neuropsychology services were available at three fourth of the centers, but a dedicated full-time neuropsychologist was available in only 16% of centers. Ninety percent of the neurologists considered neuropsychological evaluation an indispensable part of presurgical evaluation. However, only a few of them believed that the results influenced their decision about the extent of resection and ruling against surgery. The survey found considerable heterogeneity in terms of qualifications and training of neuropsychologists, evaluation procedures, test protocols, and normative data that will need to be harmonized to ensure uniform practice across the country. We believe that the results from this survey provide a road map for implementing measures to minimize existing inadequacies and harmonize neuropsychology services in India and as well as in other countries with emerging neuropsychology services. PLAIN LANGUAGE SUMMARY: Neuropsychological assessment is an integral part of the pre- and post epilepsy surgery evaluations. In India, the National Epilepsy Surgery Support Activity Network (NESSAN), a body of multidisciplinary professionals, conducted a survey to examine existing neuropsychology practices. The responses from 43 centers across the country revealed considerable heterogeneity in tests and few trained and qualified neuropsychologists. In low- and middle-income countries (LMIC) with emerging neuropsychology services, there is a need to have uniform test protocols, specialized training, and guidelines for optimizing neuropsychology services across all the epilepsy surgery centers.
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Affiliation(s)
- Urvashi Shah
- Department of Neurology, King Edward Memorial Hospital, Mumbai, Maharashtra, India
| | - Chaturbhuj Rathore
- Department of Neurology, Zydus Hospital & Smt. B. K. Shah Medical Institute and Research Center, Sumandeep Vidyapeeth, Vadodara, Gujarat, India
| | | | - Neeraj Baheti
- Department of Neurology, Central India Institute of Medical Sciences, Nagpur, Maharashtra, India
| | - Shweta Kadaba
- Institute of Neurosciences, Sakra World Hospital, Bengaluru, Karnataka, India
| | - Aparna Sahu
- Department of Neurology, King Edward Memorial Hospital, Mumbai, Maharashtra, India
| | - Suvarna Alladi
- Department of Neurology, National Institute of Mental Health and NeuroSciences, Bengaluru, India
| | - Sonal Chitnis
- Bajaj Allianz Epilepsy Center, Deenanath Mangeshkar Hospital, Pune, Maharashtra, India
| | - Annamma George
- Sree Chitra Tirunal Institute of Medical Science and Technology, Trivandrum, Kerala, India
| | - Atma Ram Bansal
- Medanta Institute of Neuroscience, The Medicity, Gurugram, India
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Fleury MN, Binding LP, Taylor P, Xiao F, Giampiccolo D, Caciagli L, Buck S, Winston GP, Thompson PJ, Baxendale S, Koepp MJ, Duncan JS, Sidhu MK. Predictors of long-term memory and network connectivity 10 years after anterior temporal lobe resection. Epilepsia 2024. [PMID: 38990127 DOI: 10.1111/epi.18058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 06/25/2024] [Accepted: 06/25/2024] [Indexed: 07/12/2024]
Abstract
OBJECTIVE Anterior temporal lobe resection (ATLR) effectively controls seizures in medically refractory temporal lobe epilepsy but risks significant episodic memory decline. Beyond 1 year postoperatively, the influence of preoperative clinical factors on episodic memory and long-term network plasticity remain underexplored. Ten years post-ATLR, we aimed to determine biomarkers of successful memory network reorganization and establish presurgical features' lasting impact on memory function. METHODS Twenty-five ATLR patients (12 left-sided) and 10 healthy controls underwent a memory-encoding functional magnetic resonance imaging paradigm alongside neuropsychometry 10 years postsurgery. Generalized psychophysiological interaction analyses modeled network functional connectivity of words/faces remembered, seeding from the medial temporal lobes (MTLs). Differences in successful memory connectivity were assessed between controls and left/right ATLR. Multivariate regressions and mixed-effect models probed preoperative phenotypes' effects on long-term memory outcomes. RESULTS Ten years post-ATLR, lower baseline functioning (verbal and performance intelligence quotient) and a focal memory impairment preoperatively predicted worse long-term memory outcomes. Poorer verbal memory was significantly associated with longer epilepsy duration and earlier onset age. Relative to controls, successful word and face encoding involved increased functional connectivity from both or remnant MTL seeds and contralesional parahippocampus/hippocampus after left/right ATLR. Irrespective of surgical laterality, successful memory encoding correlated with increased MTL-seeded connectivity to frontal (bilateral insula, right anterior cingulate), right parahippocampal, and bilateral fusiform gyri. Ten years postsurgery, better memory performance was correlated with contralateral frontal plasticity, which was disrupted with longer epilepsy duration. SIGNIFICANCE Our findings underscore the enduring nature of functional network reorganizations to provide long-term cognitive support. Ten years post-ATLR, successful memory formation featured stronger connections near resected areas and contralateral regions. Preoperative network disruption possibly influenced effectiveness of postoperative plasticity. These findings are crucial for enhancing long-term memory prediction and strategies for lasting memory rehabilitation.
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Affiliation(s)
- Marine N Fleury
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, London, UK
- MRI Unit, Epilepsy Society, Buckinghamshire, UK
| | - Lawrence P Binding
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, London, UK
- MRI Unit, Epilepsy Society, Buckinghamshire, UK
- Department of Computer Science, UCL Centre for Medical Image Computing, London, UK
| | - Peter Taylor
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, London, UK
- CNNP Lab, Interdisciplinary Computing and Complex BioSystems Group, School of Computing Science, Newcastle University, Newcastle, UK
| | - Fenglai Xiao
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, London, UK
- MRI Unit, Epilepsy Society, Buckinghamshire, UK
| | - Davide Giampiccolo
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, London, UK
- Victor Horsley Department of Neurosurgery, National Hospital for Neurology and Neurosurgery, Queen Square, London, UK
- Department of Neurosurgery, Institute of Neurosciences, Cleveland Clinic London, London, UK
| | - Lorenzo Caciagli
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, London, UK
- MRI Unit, Epilepsy Society, Buckinghamshire, UK
- Department of Neurology, Inselspital, Sleep-Wake-Epilepsy Center, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Sarah Buck
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, London, UK
- MRI Unit, Epilepsy Society, Buckinghamshire, UK
| | - Gavin P Winston
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, London, UK
- MRI Unit, Epilepsy Society, Buckinghamshire, UK
- Division of Neurology, Department of Medicine, Queen's University, Kingston, Ontario, Canada
| | - Pamela J Thompson
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, London, UK
- Psychology Department, Epilepsy Society, Buckinghamshire, UK
| | - Sallie Baxendale
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, London, UK
- Psychology Department, Epilepsy Society, Buckinghamshire, UK
| | - Matthias J Koepp
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, London, UK
- MRI Unit, Epilepsy Society, Buckinghamshire, UK
| | - John S Duncan
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, London, UK
- MRI Unit, Epilepsy Society, Buckinghamshire, UK
| | - Meneka K Sidhu
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, London, UK
- MRI Unit, Epilepsy Society, Buckinghamshire, UK
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Ailion A, Duong P, Maiman M, Tsuboyama M, Smith ML. Clinical recommendations for conducting pediatric functional language and memory mapping during the phase I epilepsy presurgical workup. Clin Neuropsychol 2024; 38:1060-1084. [PMID: 37985747 DOI: 10.1080/13854046.2023.2281708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Accepted: 11/02/2023] [Indexed: 11/22/2023]
Abstract
Objective: Pediatric epilepsy surgery effectively controls seizures but may risk cognitive, language, or memory decline. Historically, the intra-carotid anesthetic procedure (IAP or Wada Test) was pivotal for language and memory function. However, advancements in noninvasive mapping, notably functional magnetic resonance imaging (fMRI), have transformed clinical practice, reducing IAP's role in presurgical evaluations. Method: We conducted a critical narrative review on mapping technologies, including factors to consider for discordance. Results: Neuropsychological findings suggest that if pre-surgery function remains intact and the surgery targets the eloquent cortex, there is a high chance for decline. Memory and language decline are particularly pronounced post-left anterior temporal lobe resection (ATL), making presurgical cognitive assessment crucial for predicting postoperative outcomes. However, the risk of functional decline is not always clear - particularly with higher rates of atypical organization in pediatric epilepsy patients and discordant findings from cognitive mapping. We found little research to date on the use of IAP and other newer technologies for lateralization/localization in pediatric epilepsy. Based on this review, we introduce an IAP decision tree to systematically navigate discordance in IAP decisions for epilepsy presurgical workup. Conclusions: Future research should be aimed at pediatric populations to improve the precision of functional mapping, determine which methods predict post-surgical deficits and then create evidence-based practice guidelines to standardize mapping procedures. Explicit directives are needed for resolving conflicts between developing mapping procedures and established clinical measures. The proposed decision tree is the first step to standardize when to consider IAP or invasive mapping, in coordination with the multidisciplinary epilepsy surgical team.
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Affiliation(s)
- Alyssa Ailion
- Department of Psychiatry, Boston Children's Hospital, Harvard Medical School
- Department of Neurology, Boston Children's Hospital, Harvard Medical School
| | - Priscilla Duong
- Department of Psychiatry, Ann & Robert H. Lurie Children's Hospital of Chicago, Northwestern University School of Medicine
| | - Moshe Maiman
- Department of Psychiatry, Boston Children's Hospital, Harvard Medical School
| | - Melissa Tsuboyama
- Department of Neurology, Boston Children's Hospital, Harvard Medical School
| | - Mary Lou Smith
- Department of Psychology, The Hospital for Sick Children, University of Toronto Mississauga
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Sabadell V, Trébuchon A, Alario FX. An exploration of anomia rehabilitation in drug-resistant temporal lobe epilepsy. Epilepsy Behav Rep 2024; 27:100681. [PMID: 38881885 PMCID: PMC11178986 DOI: 10.1016/j.ebr.2024.100681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 05/15/2024] [Accepted: 05/27/2024] [Indexed: 06/18/2024] Open
Abstract
Around 40% of patients who undergo a left temporal lobe epilepsy (LTLE) surgery suffer from anomia (word-finding difficulties), a condition that negatively impacts quality of life. Despite these observations, language rehabilitation is still understudied in LTLE. We assessed the effect of a four-week rehabilitation on four drug-resistant LTLE patients after their surgery. The anomia rehabilitation was based on cognitive descriptions of word finding deficits in LTLE. Its primary ingredients were psycholinguistic tasks and a psychoeducation approach to help patients cope with daily communication issues. We repeatedly assessed naming skills for trained and untrained words, before and during the therapy using an A-B design with follow-up and replication. Subjective anomia complaint and standardized language assessments were also collected. We demonstrated the effectiveness of the rehabilitation program for trained words despite the persistence of seizures. Furthermore, encouraging results were observed for untrained items. Variable changes in anomia complaint were observed. One patient who conducted the protocol as self-rehabilitation responded similarly to the others, despite the different manner of intervention. These results open promising avenues for helping epileptic patients suffering from anomia. For example, this post-operative program could easily be adapted to be conducted preoperatively.
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Affiliation(s)
| | - Agnès Trébuchon
- Aix Marseille Univ, INSERM, INS, Inst Neurosci Syst, Marseille, France
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Lozano-García A, Catalán-Aguilar J, Tormos-Pons P, Hampel KG, Villanueva V, Cano-López I, González-Bono E. Impact of Polytherapy on Memory Functioning in Patients With Drug-Resistant Epilepsy: The Role of Attention and Executive Functions. Arch Clin Neuropsychol 2024; 39:423-442. [PMID: 37987193 DOI: 10.1093/arclin/acad086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Revised: 09/10/2023] [Accepted: 09/19/2023] [Indexed: 11/22/2023] Open
Abstract
OBJECTIVE The aim was to examine the effect of polytherapy (i.e., the number of administered anti-seizure medications (ASMs)) on memory, and whether the interaction between the number of ASMs and attentional/executive functioning affect presurgical memory functioning and postsurgical memory changes in patients with drug-resistant epilepsy. METHODS Two studies were carried out. Study 1 consisted of a presurgical assessment of 125 adult patients, in which attention/executive function (EpiTrack screening tool) and memory were assessed (cross-sectional study). Of them, 72 patients underwent a second postsurgical evaluation, in which memory was assessed (Study 2). Patients were distributed into groups based on EpiTrack performance and number of ASMs. RESULTS The interaction between the number of ASMs and the attentional/executive functioning significantly affected presurgical memory, with patients with impaired EpiTrack performance taking three-four ASMs having poorer scores than patients with intact EpiTrack performance taking three-four ASMs (for all, p < .0001). This interaction also affected postsurgical memory changes, with patients with impaired Epitrack performance taking three-four ASMs having higher postsurgical decline than those with intact Epitrack performance taking three-four ASMs (for all, p < .005). No differences were found in patients taking two ASMs. Furthermore, the number of ASMs was associated with presurgical memory performance and postsurgical memory changes only in patients with impaired EpiTrack performance (for all, p < .05). CONCLUSIONS Our findings underline the utility of EpiTrack, together with the clinical information on the number of prescribed ASMs, to corroborate the impact of polytherapy on memory and to optimize the prediction of postsurgical memory changes.
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Affiliation(s)
- Alejandro Lozano-García
- Faculty of Health Sciences, Valencian International University, Valencia, Spain
- Department of Psychology, Universidad Europea de Valencia, Valencia, Spain
- Faculty of Health Sciences, Universidad Isabel I, Burgos, Spain
| | - Judit Catalán-Aguilar
- IDOCAL/Department of Psychobiology, Psychology Center, University of Valencia, Valencia, Spain
| | - Paula Tormos-Pons
- IDOCAL/Department of Psychobiology, Psychology Center, University of Valencia, Valencia, Spain
| | - Kevin G Hampel
- Refractory Epilepsy Unit, Neurology Service Member of ERN EPICARE, Hospital Universitario y Politécnico La Fe, Valencia, Spain
| | - Vicente Villanueva
- Refractory Epilepsy Unit, Neurology Service Member of ERN EPICARE, Hospital Universitario y Politécnico La Fe, Valencia, Spain
| | - Irene Cano-López
- IDOCAL/Department of Psychobiology, Psychology Center, University of Valencia, Valencia, Spain
| | - Esperanza González-Bono
- IDOCAL/Department of Psychobiology, Psychology Center, University of Valencia, Valencia, Spain
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Sharma S, Nehra A, Pandey S, Tripathi M, Srivastava A, Padma MV, Garg A, Pandey RM, Chandra S, Tripathi M. Neuropsychological Rehabilitation for Epilepsy in India: Looking Beyond the Basics. Epilepsy Behav 2024; 153:109703. [PMID: 38452517 DOI: 10.1016/j.yebeh.2024.109703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 02/11/2024] [Accepted: 02/15/2024] [Indexed: 03/09/2024]
Abstract
BACKGROUND Neuropsychological Rehabilitation (NR) helps manage cognitive deficits in epilepsy. As internationally developed programs have limited applicability to resource-limited countries, we developed a program to bridge this gap. This 6-week caregiver-assisted, culturally suitable program has components of (1) psychoeducation, (2) compensatory training, and, (3) cognitive retraining and is called EMPOWER (Indigenized Home Based Attention and Memory Rehabilitation Program for Adult Patients with Drug Refractory Epilepsy). Its efficacy needs to be determined. METHODS We carried out an open-label parallel randomized controlled trial. Adults aged 18-45 years with Drug Refractory Epilepsy (DRE), fluency in Hindi and or English, with impaired attention or memory (n = 28) were randomized to Intervention Group (IG) and Control Group (CG). The primary outcomes were objective memory (Auditory Verbal Learning Test), patient and caregiver reported everyday memory difficulties (Everyday Memory Questionnaire-Revised), number of memory aids in use, depression (Hamilton Depression Rating Scale), anxiety (Hamilton Anxiety Rating Scale) and quality of life (Quality of Life in Epilepsy-31). Intention to treat was carried out for group analysis. In the absence of norms necessary for computing Reliable Change Indices (RCIs), a cut-off of +1.0 Standard Deviation (SD) was utilized to identify clinically meaningful changes in the individual analysis of objective memory. A cut-off of 11.8 points was used for quality of life. Feedback and program evaluation responses were noted. RESULTS The majority of the sample comprised DRE patients with temporal lobe epilepsy who had undergone epilepsy surgery. Group analysis indicated improved learning (p = 0.013), immediate recall (p = 0.001), delayed recall (p < 0.001), long-term retention (p = 0.031), patient-reported everyday memory (p < 0.001), caregiver-reported everyday memory (p < 0.001), anxiety (p = 0.039) and total quality of life (p < 0.001). Individual analysis showed improvement in 50 %, 64 %, 71 %, 57 %, and 64 % of patients on learning, immediate recall, delayed recall, long-term retention, and total quality of life respectively. Despite improvements, themes indicative of a lack of awareness and understanding of cognitive deficits were identified. Overall, the program was rated favorably by patients and caregivers alike. CONCLUSION NR shows promise for patients with DRE, however larger studies are warranted. The role of cognition in epilepsy needs to be introduced at the time of diagnosis to help lay the foundation for education and acceptance.
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Affiliation(s)
- Shivani Sharma
- Neuropsychology, Neurosciences Centre, All India Institute of Medical Sciences, New Delhi, India
| | - Ashima Nehra
- Neuropsychology, Neurosciences Centre, All India Institute of Medical Sciences, New Delhi, India.
| | - Shivam Pandey
- Department of Biostatistics, All India Institute of Medical Sciences, New Delhi, India
| | - Madhavi Tripathi
- Department of Nuclear Medicine, All India Institute of Medical Sciences, New Delhi, India
| | - Achal Srivastava
- Department of Neurology, All India Institute of Medical Sciences, New Delhi, India
| | - M V Padma
- Department of Neurology, All India Institute of Medical Sciences, New Delhi, India
| | - Ajay Garg
- Department of Neuroradiology, All India Institute of Medical Sciences, New Delhi, India
| | - R M Pandey
- Department of Biostatistics, All India Institute of Medical Sciences, New Delhi, India
| | - Sarat Chandra
- Department of Neurosurgery, All India Institute of Medical Sciences, New Delhi, India
| | - Manjari Tripathi
- Department of Neurology, All India Institute of Medical Sciences, New Delhi, India
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Castro‐Lima H, Passarelli V, Ribeiro ES, Adda CC, Preturlon‐Santos APP, Jorge CL, Valério R, Tzu WH, Boa‐Sorte N, Pipek LZ, Castro LHM. Bilateral ictal EEG is associated with better memory outcome after hippocampal sclerosis surgery. Epilepsia Open 2023; 8:1532-1540. [PMID: 37750472 PMCID: PMC10690677 DOI: 10.1002/epi4.12834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 09/17/2023] [Indexed: 09/27/2023] Open
Abstract
OBJECTIVE To compare memory outcomes after surgery for unilateral hippocampal sclerosis (HS)-associated epilepsy in patients with unilateral and bilateral ictal electrographic involvement. METHODS We prospectively evaluated HS patients, aged 18-55 years and IQ ≥70. Left (L) and right (R) surgical groups underwent noninvasive video-EEG monitoring and Wada test. We classified patients as Ipsilateral if ictal EEG was restricted to the HS side, or Bilateral, if at least one seizure onset occurred contralaterally to the HS, or if ictal discharge evolved to the opposite temporal region. Patients who declined surgery served as controls. Memory was evaluated on two occasions with Rey Auditory-Verbal Learning Test and Rey Visual-Design Learning Test. Baseline neuropsychological test scores were compared between groups. Pre- and postoperative scores were compared within each group. Reliable change index Z-scores (RCI) were obtained using controls as references, and compared between surgical groups. RESULTS We evaluated 64 patients. Patients were classified as: L-Ipsilateral (9), L-Bilateral (15), L-Control (9), R-Ipsilateral (10), R-Bilateral (9), and R-Control (12). On preoperative evaluation, memory performance did not differ among surgical groups. Right HS patients did not present postoperative memory decline. L-Ipsilateral group presented postoperative decline on immediate (P = 0.036) and delayed verbal recall (P = 0.011), while L-Bilateral did not decline. L-Ipsilateral had lower RCI Z-scores, indicating delayed verbal memory decline compared to L-Bilateral (P = 0.012). SIGNIFICANCE Dominant HS patients with bilateral ictal involvement presented less pronounced postoperative verbal memory decline compared to patients with exclusive ipsilateral ictal activity. Surgery was indicated in these patients regardless of memory impairment on neuropsychological testing, since resection of the left sclerotic hippocampus could result in cessation of contralateral epileptiform activity, and, therefore, improved memory function.
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Affiliation(s)
| | - Valmir Passarelli
- Department of Neurology, Hospital das Clínicas HCFMUSP, Faculdade de MedicinaUniversity of Sao PauloSão PauloBrazil
| | - Elyse S Ribeiro
- Division of Psychology, Hospital das Clínicas HCFMUSP, Faculdade de MedicinaUniversity of Sao PauloSão PauloBrazil
| | - Carla C Adda
- Division of Psychology, Hospital das Clínicas HCFMUSP, Faculdade de MedicinaUniversity of Sao PauloSão PauloBrazil
| | - Ana Paula P Preturlon‐Santos
- Department of Neurology, Hospital das Clínicas HCFMUSP, Faculdade de MedicinaUniversity of Sao PauloSão PauloBrazil
| | - Carmen L Jorge
- Department of Neurology, Hospital das Clínicas HCFMUSP, Faculdade de MedicinaUniversity of Sao PauloSão PauloBrazil
| | - Rosa Valério
- Department of Neurology, Hospital das Clínicas HCFMUSP, Faculdade de MedicinaUniversity of Sao PauloSão PauloBrazil
| | - Wen Hung Tzu
- Department of Neurosurgery, Hospital das Clínicas HCFMUSP, Faculdade de MedicinaUniversity of Sao PauloSão PauloBrazil
| | - Ney Boa‐Sorte
- Bahiana School of Medicine and Public HealthSalvadorBrazil
| | - Leonardo Zumerkorn Pipek
- Department of Neurology, Hospital das Clínicas HCFMUSP, Faculdade de MedicinaUniversity of Sao PauloSão PauloBrazil
| | - Luiz Henrique M Castro
- Department of Neurology, Hospital das Clínicas HCFMUSP, Faculdade de MedicinaUniversity of Sao PauloSão PauloBrazil
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Kocsis Z, Jenison RL, Taylor PN, Calmus RM, McMurray B, Rhone AE, Sarrett ME, Deifelt Streese C, Kikuchi Y, Gander PE, Berger JI, Kovach CK, Choi I, Greenlee JD, Kawasaki H, Cope TE, Griffiths TD, Howard MA, Petkov CI. Immediate neural impact and incomplete compensation after semantic hub disconnection. Nat Commun 2023; 14:6264. [PMID: 37805497 PMCID: PMC10560235 DOI: 10.1038/s41467-023-42088-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Accepted: 09/28/2023] [Indexed: 10/09/2023] Open
Abstract
The human brain extracts meaning using an extensive neural system for semantic knowledge. Whether broadly distributed systems depend on or can compensate after losing a highly interconnected hub is controversial. We report intracranial recordings from two patients during a speech prediction task, obtained minutes before and after neurosurgical treatment requiring disconnection of the left anterior temporal lobe (ATL), a candidate semantic knowledge hub. Informed by modern diaschisis and predictive coding frameworks, we tested hypotheses ranging from solely neural network disruption to complete compensation by the indirectly affected language-related and speech-processing sites. Immediately after ATL disconnection, we observed neurophysiological alterations in the recorded frontal and auditory sites, providing direct evidence for the importance of the ATL as a semantic hub. We also obtained evidence for rapid, albeit incomplete, attempts at neural network compensation, with neural impact largely in the forms stipulated by the predictive coding framework, in specificity, and the modern diaschisis framework, more generally. The overall results validate these frameworks and reveal an immediate impact and capability of the human brain to adjust after losing a brain hub.
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Affiliation(s)
- Zsuzsanna Kocsis
- Department of Neurosurgery, University of Iowa, Iowa City, IA, USA.
- Biosciences Institute, Newcastle University Medical School, Newcastle upon Tyne, UK.
- Neuroscience Institute, Carnegie Mellon University, Pittsburgh, PA, USA.
| | - Rick L Jenison
- Departments of Neuroscience and Psychology, University of Wisconsin, Madison, WI, USA
| | - Peter N Taylor
- CNNP Lab, Interdisciplinary Computing and Complex BioSystems Group, School of Computing, Newcastle University, Newcastle upon Tyne, UK
- UCL Institute of Neurology, Queen Square, London, UK
| | - Ryan M Calmus
- Department of Neurosurgery, University of Iowa, Iowa City, IA, USA
- Biosciences Institute, Newcastle University Medical School, Newcastle upon Tyne, UK
| | - Bob McMurray
- Department of Psychological and Brain Science, University of Iowa, Iowa City, IA, USA
| | - Ariane E Rhone
- Department of Neurosurgery, University of Iowa, Iowa City, IA, USA
| | | | | | - Yukiko Kikuchi
- Biosciences Institute, Newcastle University Medical School, Newcastle upon Tyne, UK
| | - Phillip E Gander
- Department of Neurosurgery, University of Iowa, Iowa City, IA, USA
- Department of Radiology, University of Iowa, Iowa City, IA, USA
- Iowa Neuroscience Institute, University of Iowa, Iowa City, IA, USA
| | - Joel I Berger
- Department of Neurosurgery, University of Iowa, Iowa City, IA, USA
| | | | - Inyong Choi
- Department of Communication Sciences and Disorders, University of Iowa, Iowa City, IA, USA
| | | | - Hiroto Kawasaki
- Department of Neurosurgery, University of Iowa, Iowa City, IA, USA
| | - Thomas E Cope
- Department of Clinical Neurosciences, Cambridge University, Cambridge, UK
- MRC Cognition and Brain Sciences Unit, Cambridge University, Cambridge, UK
| | - Timothy D Griffiths
- Biosciences Institute, Newcastle University Medical School, Newcastle upon Tyne, UK
| | - Matthew A Howard
- Department of Neurosurgery, University of Iowa, Iowa City, IA, USA
| | - Christopher I Petkov
- Department of Neurosurgery, University of Iowa, Iowa City, IA, USA.
- Biosciences Institute, Newcastle University Medical School, Newcastle upon Tyne, UK.
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Pillay SB, Gross WL, Janecek JK, Binder JR, Oleksy AJ, Swanson SJ. Reliable change on the selective reminding test in a series of left-hemisphere language dominant patients with right temporal lobe epilepsy. Epilepsy Behav 2023; 138:109004. [PMID: 36473300 PMCID: PMC9885384 DOI: 10.1016/j.yebeh.2022.109004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 11/15/2022] [Accepted: 11/16/2022] [Indexed: 12/09/2022]
Abstract
The Selective Reminding Test (SRT) is widely used in pre-surgical evaluations for people with epilepsy; however, important characteristics such as reliability and stability over time within an epilepsy-specific control cohort are unclear. In this study, we document test-retest reliabilities, practice effects, and Reliable Change Indices (RCI) for this test in a sample of right temporal lobe epilepsy patients who are left hemisphere dominant for language and underwent surgical resection on the right temporal lobe. A sample of 101 adults with a right temporal lobe seizure focus (mean age = 38.5) was administered the SRT pre- and post-right temporal lobe surgery. Test-retest reliabilities were modest (r = 0.44-0.59). Practice effects were minimal (0.25-2.04). Reliable Change Indices were calculated and ranged from 4 to 26 depending on the SRT index. The RCI's indicate that relatively moderate to large changes on the SRT are needed for a change score to be considered a significant change in an individual's performance. The RCIs can be used to detect a reliable change in patients undergoing left temporal lobe epilepsy surgery who are at significant risk for verbal memory decline.
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Affiliation(s)
- Sara B Pillay
- Medical College of Wisconsin, Department of Neurology, 8701 W. Watertown Plank Rd., Milwaukee, WI 53226, United States.
| | - William L Gross
- Medical College of Wisconsin, Department of Neurology, 8701 W. Watertown Plank Rd., Milwaukee, WI 53226, United States
| | - Julie K Janecek
- Medical College of Wisconsin, Department of Neurology, 8701 W. Watertown Plank Rd., Milwaukee, WI 53226, United States
| | - Jeffrey R Binder
- Medical College of Wisconsin, Department of Neurology, 8701 W. Watertown Plank Rd., Milwaukee, WI 53226, United States
| | - Anthony J Oleksy
- Medical College of Wisconsin, Department of Neurology, 8701 W. Watertown Plank Rd., Milwaukee, WI 53226, United States
| | - Sara J Swanson
- Medical College of Wisconsin, Department of Neurology, 8701 W. Watertown Plank Rd., Milwaukee, WI 53226, United States
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10
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Heerwig C, Möller H, Brückner K. Neuropsychology of epilepsy in old age – English Version. ZEITSCHRIFT FÜR EPILEPTOLOGIE 2022. [DOI: 10.1007/s10309-022-00479-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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11
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Sherlock C, Madigan C, Linehan C, Keenan L, Downes M. Academic attainment following pediatric epilepsy surgery: A systematic review. Epilepsy Behav 2022; 134:108847. [PMID: 35914437 DOI: 10.1016/j.yebeh.2022.108847] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 07/05/2022] [Accepted: 07/05/2022] [Indexed: 11/03/2022]
Abstract
Academic skills, such as reading, spelling and arithmetic, are central to meaningful engagement with society throughout adolescence and into adulthood. The disruption caused by on-going seizure activity places children with drug-resistant epilepsy at a particularly high risk of poor academic attainment. Though epilepsy surgery during childhood has long-been associated with various cognitive changes, less is known of the extent to which pediatric epilepsy surgery impacts academic attainment. The aim of the present systematic review was to identify the nature of the effect of pediatric epilepsy surgery on the core academic skills of reading, writing, and arithmetic. The electronic databases Embase, Medline, PubMed, PsychInfo, OpenAire, and the ISRCTN registry were searched for studies examining academic attainment following epilepsy surgery in childhood, over the last three decades. Two thousand three-hundred and sixty-eight articles were screened for relevance. Thirteen studies met the inclusion criteria. Study quality and reliability were independently assessed by two reviewers. Results indicate that academic attainment primarily stabilizes in the first year following epilepsy surgery. Though changes to learning ability would not be expected in this early recovery phase, this review indicates that children do not, at least, lose the academic skills they have acquired before surgery. Postoperative declines in performance were most notably recorded in assessments of arithmetic, suggesting an area of potential vulnerability in this cohort. These declines were noted in cohorts with the longest periods between seizure onset and surgery. While older age at onset and seizure freedom correlated with improved academic attainment, further research is necessary to fully understand the specific effect of epilepsy surgery on academic attainment. Still, the present review provides valuable information regarding the likely academic outcomes in the early years following surgical treatment for drug-resistant epilepsy.
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Affiliation(s)
- Clara Sherlock
- University College Dublin, UCD School of Psychology, Dublin, Ireland.
| | - Cathy Madigan
- Children's Health Ireland at Temple Street, Dublin, Ireland
| | - Christine Linehan
- University College Dublin, UCD School of Psychology, Dublin, Ireland; UCD Centre for Disability Studies, University College Dublin, Dublin, Ireland
| | - Lisa Keenan
- University College Dublin, UCD School of Psychology, Dublin, Ireland
| | - Michelle Downes
- University College Dublin, UCD School of Psychology, Dublin, Ireland
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12
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de Andrade Morange D, Laguitton V, Carron R, Schön D, Bénar CG, Giusiano B, Bartolomei F, Trébuchon A. Hippocampal intracerebral evoked potentials as a marker of its functionality in drug-resistant epilepsy. Neurophysiol Clin 2022; 52:323-332. [PMID: 35989149 DOI: 10.1016/j.neucli.2022.07.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 06/24/2022] [Accepted: 07/06/2022] [Indexed: 10/15/2022] Open
Abstract
OBJECTIVES To assess hippocampal function during stereoelectroencephalography (SEEG) investigations through the study of the medial temporal lobe event-related potential (ERP) MTL-P300. METHODS We recorded the MTL-P300 during a visual oddball task, using hippocampal electrodes implanted for SEEG in 71 patients, in a preoperative epilepsy investigation. The presence of an MTL-P300 and its amplitude were correlated with hippocampal involvement during seizures and memory function. RESULTS Analysis using ROC curves revealed that an MTL-P300 amplitude below -46 µV, has a specificity of 93.3% in detecting the epileptogenic zone, and absence of the MTL-P300 in the left hippocampus of patients with typical language organization was associated with marked alteration of verbal memory scores. There was a significant correlation between performance in non-verbal memory tests and the amplitude of the MTL-P300 in the right hippocampus of patients with left hemispheric seizures (immediate visual recall: r = 0.67, p = 0.005; delayed visual recall: r = 0.56, p = 0.025). Using a linear regression, we confirmed that the absence of the MTL-P300 in the left hippocampus, the involvement of the left hippocampus during seizures, and the duration of epilepsy were predictors of verbal memory deficits. CONCLUSION Analysis of the MTL-P300 during SEEG recording provides relevant information for the analysis of hippocampal functionality and can help to localize the epileptogenic zone.
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Affiliation(s)
- Daniela de Andrade Morange
- Aix Marseille Univ, INSERM, INS, Inst Neurosci Syst, Marseille, France; University Hospital Professor Edgard Santos (HUPES), Clinical Neurophysiology, Brazil
| | - Virginie Laguitton
- AP-HM, Hôpital de la Timone, Service de Neurophysiologie Clinique, Marseille, France
| | - Romain Carron
- Aix Marseille Univ, INSERM, INS, Inst Neurosci Syst, Marseille, France; AP-HM, Timone Hospital, Stereotactic and Functional Neurosurgery, France
| | - Daniele Schön
- Aix Marseille Univ, INSERM, INS, Inst Neurosci Syst, Marseille, France
| | - Christian-George Bénar
- Aix Marseille Univ, INSERM, INS, Inst Neurosci Syst, Marseille, France; AP-HM, Hôpital de la Timone, Service de Neurophysiologie Clinique, Marseille, France
| | - Bernard Giusiano
- Aix Marseille Univ, INSERM, INS, Inst Neurosci Syst, Marseille, France
| | - Fabrice Bartolomei
- Aix Marseille Univ, INSERM, INS, Inst Neurosci Syst, Marseille, France; AP-HM, Hôpital de la Timone, Service de Neurophysiologie Clinique, Marseille, France
| | - Agnès Trébuchon
- Aix Marseille Univ, INSERM, INS, Inst Neurosci Syst, Marseille, France; AP-HM, Hôpital de la Timone, Service de Neurophysiologie Clinique, Marseille, France.
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13
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Tamrakar S, Iimura Y, Suzuki H, Mitsuhashi T, Ueda T, Nishioka K, Karagiozov K, Nakajima M, Miao Y, Tanaka T, Sugano H. Higher phase-amplitude coupling between ripple and slow oscillations indicates the distribution of epileptogenicity in temporal lobe epilepsy with hippocampal sclerosis. Seizure 2022; 100:1-7. [DOI: 10.1016/j.seizure.2022.05.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 05/27/2022] [Accepted: 05/28/2022] [Indexed: 10/18/2022] Open
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14
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Mezjan I, Brissart H, Masson D, Vignal JP, Aron O, Ferrand M, Civit T, Maillard L, Colnat-Coulbois S. Epilepsy surgery for drug-resistant temporal lobe epilepsy in over-50 year-olds: seizure outcome, surgical complications and neuropsychological outcome. Neurochirurgie 2022; 68:510-517. [DOI: 10.1016/j.neuchi.2022.04.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 02/19/2022] [Accepted: 04/07/2022] [Indexed: 10/18/2022]
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Abstract
PURPOSE OF REVIEW More than 20 new antiseizure medications have been approved by the US Food and Drug Administration (FDA) in the past 3 decades; however, outcomes in newly diagnosed epilepsy have not improved, and epilepsy remains drug resistant in up to 40% of patients. Evidence supports improved seizure outcomes and quality of life in those who have undergone epilepsy surgery, but epilepsy surgery remains underutilized. This article outlines indications for epilepsy surgery, describes the presurgical workup, and summarizes current available surgical approaches. RECENT FINDINGS Class I evidence has demonstrated the superiority of resective surgery compared to medical therapy for seizure control and quality of life in patients with drug-resistant epilepsy. The use of minimally invasive options, such as laser interstitial thermal therapy and stereotactic radiosurgery, are alternatives to resective surgery in well-selected patients. Neuromodulation techniques, such as responsive neurostimulation, deep brain stimulation, and vagus nerve stimulation, offer a suitable alternative, especially in those where resective surgery is contraindicated or where patients prefer nonresective surgery. Although neuromodulation approaches reduce seizure frequency, they are less likely to be associated with seizure freedom than resective surgery. SUMMARY Appropriate patients with drug-resistant epilepsy benefit from epilepsy surgery. If two well-chosen and tolerated medication trials do not achieve seizure control, referral to a comprehensive epilepsy center for a thorough presurgical workup and discussion of surgical options is appropriate. Mounting Class I evidence supports a significantly higher chance of stopping disabling seizures with surgery than with further medication trials.
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Stasenko A, Kaestner E, Reyes A, Lalani SJ, Paul B, Hegde M, Helm JL, Ben-Haim S, McDonald CR. Association Between Microstructural Asymmetry of Temporal Lobe White Matter and Memory Decline After Anterior Temporal Lobectomy. Neurology 2022; 98:e1151-e1162. [PMID: 35058338 PMCID: PMC8935440 DOI: 10.1212/wnl.0000000000200047] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Accepted: 01/03/2022] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND AND OBJECTIVES Risk for memory decline is a substantial concern in patients with temporal lobe epilepsy (TLE) undergoing anterior temporal lobectomy (ATL). Although prior studies have identified associations between memory and integrity of white matter (WM) networks within the medial temporal lobe (MTL) preoperatively, we contribute a study examining whether microstructural asymmetry of deep and superficial WM networks within the MTL predicts postoperative memory decline. METHODS Patients with drug-resistant TLE were recruited from 2 epilepsy centers in a prospective longitudinal study. All patients completed preoperative T1 and diffusion-weighted MRI (DWI) as well as preoperative and postoperative neuropsychological testing. Preoperative fractional anisotropy (FA) of the WM directly beneath the neocortex (i.e., superficial WM [SWM]) and of deep WM tracts associated with memory were calculated. Asymmetry was calculated for hippocampal volume and FA of each WM tract or region and examined in linear and logistic regressions with preoperative to postoperative memory change as the primary outcome. RESULTS Data were analyzed from 42 patients with TLE (19 left TLE [LTLE], 23 right TLE [RTLE]) who underwent ATL. Leftward FA asymmetry of the entorhinal SWM was associated with decline on prose and associative recall in LTLE, whereas leftward FA asymmetry of the uncinate fasciculus (UNC) was associated with decline on prose recall only. After controlling for preoperative memory score and hippocampal volume, leftward FA asymmetry of the entorhinal SWM uniquely contributed to decline in both prose and associative recall (β = -0.46; SE 0.14 and β = -0.68; SE 0.22, respectively) and leftward FA asymmetry of the UNC uniquely contributed to decline in prose recall (β = -0.31; SE 0.14). A model combining asymmetry of hippocampal volume and entorhinal FA correctly classified memory outcomes in 79% of patients with LTLE for prose (area under the curve [AUC] 0.89; sensitivity 82%; specificity 75%) and 81% of patients for associative (AUC 0.79; sensitivity 83%; specificity 80%) recall. Entorhinal SWM asymmetry was the strongest predictor in both models. DISCUSSION Preoperative asymmetry of deep WM and SWM integrity within the MTL is a strong predictor of postoperative memory decline in TLE, suggesting that surgical decision-making may benefit from considering each patient's WM network adequacy and reserve in addition to hippocampal integrity. CLASSIFICATION OF EVIDENCE This study provides Class II evidence that preoperative asymmetry of deep WM and SWM integrity within the MTL is a predictor of postoperative memory decline.
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Affiliation(s)
- Alena Stasenko
- From the Center for Multimodal Imaging and Genetics (A.S., E.K., A.R., C.R.M.) and Departments of Psychiatry (A.S., E.K., A.R., S.J.L., C.R.M.) and Neurosurgery (S.B.-H.), University of California, San Diego; San Diego State University/University of California San Diego Joint Doctoral Program in Clinical Psychology (A.R., C.R.M.); Department of Neurology (B.P., M.H.), University of California, San Francisco; and Department of Psychology (J.L.H.), San Diego State University, CA
| | - Erik Kaestner
- From the Center for Multimodal Imaging and Genetics (A.S., E.K., A.R., C.R.M.) and Departments of Psychiatry (A.S., E.K., A.R., S.J.L., C.R.M.) and Neurosurgery (S.B.-H.), University of California, San Diego; San Diego State University/University of California San Diego Joint Doctoral Program in Clinical Psychology (A.R., C.R.M.); Department of Neurology (B.P., M.H.), University of California, San Francisco; and Department of Psychology (J.L.H.), San Diego State University, CA
| | - Anny Reyes
- From the Center for Multimodal Imaging and Genetics (A.S., E.K., A.R., C.R.M.) and Departments of Psychiatry (A.S., E.K., A.R., S.J.L., C.R.M.) and Neurosurgery (S.B.-H.), University of California, San Diego; San Diego State University/University of California San Diego Joint Doctoral Program in Clinical Psychology (A.R., C.R.M.); Department of Neurology (B.P., M.H.), University of California, San Francisco; and Department of Psychology (J.L.H.), San Diego State University, CA
| | - Sanam J Lalani
- From the Center for Multimodal Imaging and Genetics (A.S., E.K., A.R., C.R.M.) and Departments of Psychiatry (A.S., E.K., A.R., S.J.L., C.R.M.) and Neurosurgery (S.B.-H.), University of California, San Diego; San Diego State University/University of California San Diego Joint Doctoral Program in Clinical Psychology (A.R., C.R.M.); Department of Neurology (B.P., M.H.), University of California, San Francisco; and Department of Psychology (J.L.H.), San Diego State University, CA
| | - Brianna Paul
- From the Center for Multimodal Imaging and Genetics (A.S., E.K., A.R., C.R.M.) and Departments of Psychiatry (A.S., E.K., A.R., S.J.L., C.R.M.) and Neurosurgery (S.B.-H.), University of California, San Diego; San Diego State University/University of California San Diego Joint Doctoral Program in Clinical Psychology (A.R., C.R.M.); Department of Neurology (B.P., M.H.), University of California, San Francisco; and Department of Psychology (J.L.H.), San Diego State University, CA
| | - Manu Hegde
- From the Center for Multimodal Imaging and Genetics (A.S., E.K., A.R., C.R.M.) and Departments of Psychiatry (A.S., E.K., A.R., S.J.L., C.R.M.) and Neurosurgery (S.B.-H.), University of California, San Diego; San Diego State University/University of California San Diego Joint Doctoral Program in Clinical Psychology (A.R., C.R.M.); Department of Neurology (B.P., M.H.), University of California, San Francisco; and Department of Psychology (J.L.H.), San Diego State University, CA
| | - Jonathan L Helm
- From the Center for Multimodal Imaging and Genetics (A.S., E.K., A.R., C.R.M.) and Departments of Psychiatry (A.S., E.K., A.R., S.J.L., C.R.M.) and Neurosurgery (S.B.-H.), University of California, San Diego; San Diego State University/University of California San Diego Joint Doctoral Program in Clinical Psychology (A.R., C.R.M.); Department of Neurology (B.P., M.H.), University of California, San Francisco; and Department of Psychology (J.L.H.), San Diego State University, CA
| | - Sharona Ben-Haim
- From the Center for Multimodal Imaging and Genetics (A.S., E.K., A.R., C.R.M.) and Departments of Psychiatry (A.S., E.K., A.R., S.J.L., C.R.M.) and Neurosurgery (S.B.-H.), University of California, San Diego; San Diego State University/University of California San Diego Joint Doctoral Program in Clinical Psychology (A.R., C.R.M.); Department of Neurology (B.P., M.H.), University of California, San Francisco; and Department of Psychology (J.L.H.), San Diego State University, CA
| | - Carrie R McDonald
- From the Center for Multimodal Imaging and Genetics (A.S., E.K., A.R., C.R.M.) and Departments of Psychiatry (A.S., E.K., A.R., S.J.L., C.R.M.) and Neurosurgery (S.B.-H.), University of California, San Diego; San Diego State University/University of California San Diego Joint Doctoral Program in Clinical Psychology (A.R., C.R.M.); Department of Neurology (B.P., M.H.), University of California, San Francisco; and Department of Psychology (J.L.H.), San Diego State University, CA.
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Halder T, Michl P, Flanagin V, Schenk T. Impaired Emotion Processing and Panic Disorder After Left Anterior Temporal Lobectomy: A Case Report of Successful Psychotherapeutic Intervention. COGNITIVE THERAPY AND RESEARCH 2022. [DOI: 10.1007/s10608-022-10301-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Abstract
Background
Over the last decades, brain surgery became a more frequently applied treatment for temporal lobe epilepsy (TLE). Despite its success, several studies found de-novo post-operative psychiatric symptoms in TLE surgery patients. Cognitive behavioural therapy is effective to treat brain healthy psychiatric patients but might not be translatable to patients with resections in emotion regulating networks as these areas seem to be essentially involved in successful psychotherapeutic treatment.
Methods
Here we report the case of a female patient with medically refractory medial temporal lobe epilepsy resulting in left anterior temporal lobectomy at age 35. Post operation she did not show adequate fearful response but at the same time manifested symptoms of a severe panic disorder. We investigated if this patient, despite lesions in emotion-behaviour brain circuits, can benefit from cognitive behavioural therapy.
Results
The intervention, customized to the specific resources and difficulties of the patient, was effective in stopping panic attacks and improving social functioning.
Conclusions
This case shows that MTL brain surgery patients may benefit from CBT and demonstrates the important and if yet still somewhat mysterious role of the amygdala in emotion regulation processes.
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Kilpattu Ramaniharan A, Zhang MW, Selladurai G, Martin R, Ver Hoef L. Loss of hippocampal dentation in hippocampal sclerosis and its relationship to memory dysfunction. Epilepsia 2022; 63:1104-1114. [PMID: 35243619 DOI: 10.1111/epi.17211] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 02/25/2022] [Accepted: 02/28/2022] [Indexed: 11/29/2022]
Abstract
OBJECTIVE Hippocampal dentation (HD) is a "tooth-like" morphological feature observed on the inferior aspect of the human hippocampus. It has been found that HD varies dramatically in healthy adults and is positively associated with verbal and visual memory. In this work, we evaluate the loss of HD and its association to memory dysfunction in patients with temporal lobe epilepsy who have hippocampal sclerosis (HS). METHODS 58 unilateral HS patients with neuropsychological data were identified from a retrospective database. T1w MPRAGE images (~1mm resolution) were upsampled to 0.25mm and were processed using ASHS software to obtain ultra high resolution segmentations and 3D renderings. Dentes were counted on the epileptic and contralateral sides, and associations were tested between dentation on the epileptic versus contralateral sides and measures of verbal and visuospatial memory with respect to the dominant versus non-dominant hemisphere. RESULTS The median number of dentes in epileptic hippocampi was significantly lower than in contralateral hippocampi (p<0.0001). Among cases with HS in the dominant hemisphere, verbal memory was significantly correlated with contralateral non-dominant hemisphere dentation (r = 0.45, p = 0.02). Similarly, among cases of HS in the non-dominant hemisphere, visual memory was significantly correlated with contralateral dominant hemisphere dentation (r = 0.50, p = 0.03). All other analyses were not significant. SIGNIFICANCE This is the first study characterizing dentation in TLE patients with HS and its memory correlates. There is marked loss of dentation in sclerotic hippocampi compared to the unaffected contralateral hippocampi. Material-specific measures of memory performance are paradoxically correlated with dentation contralateral to the side with HS, suggesting that contralateral functional capacity explains some of the variation in memory across TLE patients. Hippocampal dentation is an important variable to consider in understanding memory loss in TLE.
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Affiliation(s)
| | - Mike Weng Zhang
- University of Alabama at Birmingham, Department of Neurology, Birmingham, Alabama, USA
| | - Goutham Selladurai
- University of Alabama at Birmingham, Department of Neurology, Birmingham, Alabama, USA
| | - Roy Martin
- University of Alabama at Birmingham, Department of Neurology, Birmingham, Alabama, USA
| | - Lawrence Ver Hoef
- University of Alabama at Birmingham, Department of Neurology, Birmingham, Alabama, USA.,Baptist Health Medical Group, Department of Neurology, Louisville, Kentucky, USA
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Deifelt Streese C, Manzel K, Wu Z, Tranel D. Lateralized differences for verbal learning across trials in temporal lobe epilepsy are not affected by surgical intervention. Epilepsy Behav 2022; 128:108561. [PMID: 35065396 PMCID: PMC8898285 DOI: 10.1016/j.yebeh.2022.108561] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 01/03/2022] [Accepted: 01/04/2022] [Indexed: 11/24/2022]
Abstract
This research aimed to broaden understanding of learning verbal material in participants with left- and right-sided mesial temporal lobe epilepsy (MTLE). We modeled word list-learning to determine how anterior temporal lobe resection affects verbal learning. Verbal learning (across trials) was assessed using the first five trials of the Rey Auditory Verbal Learning Test (RAVLT) in 128 participants with MTLE. Mixedeffects modeling was used to determine whether learning curves differed between participants with left- and right-sided MTLE pre- and post- anterior temporal lobe resection. Laterality of MTLE had a significant effect on both the model intercept and the linear slope, whereby participants with left-sided MTLE retained fewer words on both the first trial and on each subsequent trial than participants with right-sided MTLE; and this held regardless of anterior temporal lobe resection status (t(117) = -3.516, p < .001; t(120.50) = -2.049, p = .042, for intercept and linear slope, respectively). There were no significant differences in the learning curves after anterior temporal lobe resection surgery in either left- or right-sided MTLE. Our findings suggest that acquisition of verbal information may be especially impaired in patients with left-sided MTLE. Further, we show that verbal learning across trials was not affected by surgical intervention. This finding contributes to the broader understanding of the impacts of anterior temporal lobe resection on verbal memory function, and has important implications for the clinical management and surgical planning for patients with temporal lobe epilepsy.
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Affiliation(s)
- Carolina Deifelt Streese
- Department of Neurosurgery, Carver College of Medicine, 200 Hawkins Drive, Iowa City, IA 52242, United States; Department of Neurology, Carver College of Medicine, 200 Hawkins Drive, Iowa City, IA 52242, United States.
| | - Kenneth Manzel
- Department of Neurology, Carver College of Medicine, 200 Hawkins Drive, Iowa City, IA 52242, United States
| | - Zhengyuan Wu
- Department of Neurology, Carver College of Medicine, 200 Hawkins Drive, Iowa City, IA 52242, United States
| | - Daniel Tranel
- Department of Neurology, Carver College of Medicine, 200 Hawkins Drive, Iowa City, IA 52242, United States; Department of Psychological and Brain Sciences, University of Iowa, 340 Iowa Avenue, Iowa City, IA 52242, United States
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20
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Shlobin NA, Campbell JM, Rosenow JM, Rolston JD. Ethical considerations in the surgical and neuromodulatory treatment of epilepsy. Epilepsy Behav 2022; 127:108524. [PMID: 34998267 PMCID: PMC10184316 DOI: 10.1016/j.yebeh.2021.108524] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 12/19/2021] [Accepted: 12/19/2021] [Indexed: 02/08/2023]
Abstract
Surgical resection and neuromodulation are well-established treatments for those with medically refractory epilepsy. These treatments entail important ethical considerations beyond those which extend to the treatment of epilepsy generally. In this paper, the authors explore these unique considerations through a framework that relates foundational principles of bioethics to features of resective epilepsy surgery and neuromodulation. The authors conducted a literature review to identify ethical considerations for a variety of epilepsy surgery procedures and to examine how foundational principles in bioethics may inform treatment decisions. Healthcare providers should be cognizant of how an increased prevalence of somatic and psychiatric comorbidities, the dynamic nature of symptom burden over time, the individual and systemic barriers to treatment, and variable sociocultural contexts constitute important ethical considerations regarding the use of surgery or neuromodulation for the treatment of epilepsy. Moreover, careful attention should be paid to how resective epilepsy surgery and neuromodulation relate to notions of patient autonomy, safety and privacy, and the shared responsibility for device management and maintenance. A three-tiered approach-(1) gathering information and assessing the risks and benefits of different treatment options, (2) clear communication with patient or proxy with awareness of patient values and barriers to treatment, and (3) long-term decision maintenance through continued identification of gaps in understanding and provision of information-allows for optimal treatment of the individual person with epilepsy while minimizing disparities in epilepsy care.
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Affiliation(s)
- Nathan A Shlobin
- Department of Neurological Surgery, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.
| | - Justin M Campbell
- Department of Neurosurgery, University of Utah, Salt Lake City, UT, USA; Department of Neuroscience, University of Utah, Salt Lake City, UT, USA
| | - Joshua M Rosenow
- Department of Neurological Surgery, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - John D Rolston
- Department of Neurosurgery, University of Utah, Salt Lake City, UT, USA; Department of Biomedical Engineering, University of Utah, Salt Lake City, UT, USA
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21
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Baxendale S, Baker GA. Uses and abuses of the neuropsychological assessment in the presurgical evaluation of epilepsy surgery candidates. Epilepsy Behav Rep 2022; 18:100507. [PMID: 35198950 PMCID: PMC8850726 DOI: 10.1016/j.ebr.2021.100507] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Revised: 11/17/2021] [Accepted: 11/18/2021] [Indexed: 11/25/2022] Open
Abstract
Results from the neuropsychological assessment must be integrated into the wider clinical picture for all epilepsy surgery candidates. Motivation for surgery must be fully explored to ensure informed consent, even in ‘ideal’ surgical candidates. Inappropriate weight should not be given to standalone neuropsychological scores in the surgical decision making process.
Recent guidelines from the International League Against Epilepsy (ILAE) delineating the role of the neuropsychologist in the assessment of epilepsy surgery patients stress the collaborative contribution neuropsychologists should make to seizure characterization, lateralization and localization in the pre-surgical setting. The role they should play in the comprehensive counselling of surgical candidates, including exploration of the patient’s expectations of surgical treatment is also mandated. In this paper we present two contrasting case studies which illustrate the importance of these roles and the impact they can have on patient outcomes. In Case A we describe the patient journey of a 69-year-old women with left hippocampal sclerosis and concordant neurophysiology and seizure semiology. We present the series of discussions and decisions which led her to reject the surgical option following a detailed exploration of her motivations for surgery and the likely cognitive consequences of the procedure. In Case B we describe the series of errors and omissions which led to the failure of a clinical team to correctly interpret and integrate neuropsychological findings into the larger clinical picture of a 19-year-old woman with a seven year history of seizures. These errors ultimately culminated in the patient undergoing a right temporal lobe resection to treat psychogenic nonepileptic seizures (PNES). The extent of integration of the data from the clinical neuropsychological assessment in the full presurgical evaluation was critical in determining the outcomes in both of these cases. Surgery did not solve Case B’s problems and left her with the lifelong cognitive vulnerabilities that are associated with unilateral temporal lobe resection. In contrast, Case A was a good surgical candidate, but comprehensive integration of the neuropsychological findings into the larger clinical picture established that surgery was not the best solution to the problem she wished to solve.
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22
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Milligan TA. What's in Your Nomogram? Personalized Prognostication of Verbal Memory Decline after Temporal Lobe Resection in Adults With Epilepsy. Epilepsy Curr 2022; 22:41-42. [PMID: 35233197 PMCID: PMC8832347 DOI: 10.1177/15357597211058270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE This study aims to develop and externally validate models to predict the probability of postoperative verbal memory decline in adults following temporal lobe resection (TLR) for epilepsy using easily accessible preoperative clinical predictors. METHODS Multivariable models were developed to predict delayed verbal memory outcome on 3 commonly used measures: Rey Auditory Verbal Learning Test (RAVLT), and Logical Memory (LM), and Verbal Paired Associates (VPA) subtests from Wechsler Memory Scale-Third Edition. Using Harrell's step-down procedure for variable selection, models were developed in 359 adults who underwent TLR at Cleveland Clinic and validated in 290 adults at 1 of 5 epilepsy surgery centers in the United States or Canada. RESULTS Twenty-nine percent of the development cohort and 26% of the validation cohort demonstrated significant decline on at least 1 verbal memory measure. Initial models had good-to-excellent predictive accuracy (calibration (c) statistic range = .77-.80) in identifying patients with memory decline; however, models slightly underestimated decline in the validation cohort. Model coefficients were updated using data from both cohorts to improve stability. The model for RAVLT included surgery side, baseline memory score, and hippocampal resection. The models for LM and VPA included surgery side, baseline score, and education. Updated model performance was good to excellent (RAVLT c = .81, LM c = .76, VPA c = .78). Model calibration was very good, indicating no systematic over- or under-estimation of risk. CONCLUSIONS Nomograms are provided in 2 easy-to-use formats to assist clinicians in estimating the probability of verbal memory decline in adults considering TLR for treatment of epilepsy.
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Smith ML. "Is this normal after such a major surgery?" Memory complaint after right temporal lobe excision in an adolescent. Epilepsy Behav Rep 2022; 18:100515. [PMID: 35243287 PMCID: PMC8857461 DOI: 10.1016/j.ebr.2021.100515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 11/17/2021] [Accepted: 12/02/2021] [Indexed: 12/01/2022] Open
Abstract
Memory deficits are commonly associated with temporal-lobe epilepsy. Memory may worsen after surgical resection of the temporal lobe. Risk factors for decline are structural integrity of the mesial temporal lobe structures and intact pre-operative memory. Subjective memory complaints are influenced by depression or other psychological disorders. A 16-year-old girl underwent resection from the right lateral and medial temporal lobe and after surgery she complained of a significant memory impairment, which was unexpected given her baseline assessment. Before undertaking a neuropsychological assessment, she was referred for a psychiatric consultation which revealed depression, leading to treatment with anditdepressant medication. Over time she also admitted to severe headaches and inadequate sleep. With these issues addressed, assessment indicated memory performance had not changed relative to her preoperative baseline with stability or improvement in memory across longitudinal assessments. This case illustrates the contribution of mood state and other potential factors in contributing to subjective memory complaints.
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Affiliation(s)
- Mary Lou Smith
- University of Toronto, The Hospital for Sick Children, Toronto ON M5G 1X8, Canada
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24
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Wu C, Ferreira F, Fox M, Harel N, Hattangadi-Gluth J, Horn A, Jbabdi S, Kahan J, Oswal A, Sheth SA, Tie Y, Vakharia V, Zrinzo L, Akram H. Clinical applications of magnetic resonance imaging based functional and structural connectivity. Neuroimage 2021; 244:118649. [PMID: 34648960 DOI: 10.1016/j.neuroimage.2021.118649] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 09/24/2021] [Accepted: 10/10/2021] [Indexed: 12/23/2022] Open
Abstract
Advances in computational neuroimaging techniques have expanded the armamentarium of imaging tools available for clinical applications in clinical neuroscience. Non-invasive, in vivo brain MRI structural and functional network mapping has been used to identify therapeutic targets, define eloquent brain regions to preserve, and gain insight into pathological processes and treatments as well as prognostic biomarkers. These tools have the real potential to inform patient-specific treatment strategies. Nevertheless, a realistic appraisal of clinical utility is needed that balances the growing excitement and interest in the field with important limitations associated with these techniques. Quality of the raw data, minutiae of the processing methodology, and the statistical models applied can all impact on the results and their interpretation. A lack of standardization in data acquisition and processing has also resulted in issues with reproducibility. This limitation has had a direct impact on the reliability of these tools and ultimately, confidence in their clinical use. Advances in MRI technology and computational power as well as automation and standardization of processing methods, including machine learning approaches, may help address some of these issues and make these tools more reliable in clinical use. In this review, we will highlight the current clinical uses of MRI connectomics in the diagnosis and treatment of neurological disorders; balancing emerging applications and technologies with limitations of connectivity analytic approaches to present an encompassing and appropriate perspective.
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Affiliation(s)
- Chengyuan Wu
- Department of Neurological Surgery, Vickie and Jack Farber Institute for Neuroscience, Thomas Jefferson University, 909 Walnut Street, Third Floor, Philadelphia, PA 19107, USA; Jefferson Integrated Magnetic Resonance Imaging Center, Department of Radiology, Thomas Jefferson University, 909 Walnut Street, First Floor, Philadelphia, PA 19107, USA.
| | - Francisca Ferreira
- Victor Horsley Department of Neurosurgery, National Hospital for Neurology and Neurosurgery, 33 Queen Square, London WC1N 3BG, UK; Unit of Functional Neurosurgery, UCL Queen Square Institute of Neurology, 33 Queen Square, London WC1N 3BG, UK.
| | - Michael Fox
- Center for Brain Circuit Therapeutics, Departments of Neurology, Psychiatry, Radiology, and Neurosurgery, Brigham and Women's Hospital, Harvard Medical School, 60 Fenwood Road, Boston, MA 02115, USA.
| | - Noam Harel
- Center for Magnetic Resonance Research, University of Minnesota, 2021 Sixth Street S.E., Minneapolis, MN 55455, USA.
| | - Jona Hattangadi-Gluth
- Department of Radiation Medicine and Applied Sciences, Center for Precision Radiation Medicine, University of California, San Diego, 3855 Health Sciences Drive, La Jolla, CA 92037, USA.
| | - Andreas Horn
- Neurology Department, Movement Disorders and Neuromodulation Section, Charité - University Medicine Berlin, Charitéplatz 1, D-10117, Berlin, Germany.
| | - Saad Jbabdi
- Wellcome Centre for Integrative Neuroimaging, Centre for Functional MRI of the Brain, Nuffield Department of Clinical Neurosciences, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DU, UK.
| | - Joshua Kahan
- Department of Neurology, Weill Cornell Medicine, 525 East 68th Street, New York, NY, 10065, USA.
| | - Ashwini Oswal
- Medical Research Council Brain Network Dynamics Unit, University of Oxford, Mansfield Rd, Oxford OX1 3TH, UK.
| | - Sameer A Sheth
- Department of Neurosurgery, Baylor College of Medicine, 7200 Cambridge, Ninth Floor, Houston, TX 77030, USA.
| | - Yanmei Tie
- Center for Brain Circuit Therapeutics, Departments of Neurology, Psychiatry, Radiology, and Neurosurgery, Brigham and Women's Hospital, Harvard Medical School, 60 Fenwood Road, Boston, MA 02115, USA; Department of Neurosurgery, Brigham and Women's Hospital, Harvard Medical School, 60 Fenwood Road, Boston, MA 02115, USA.
| | - Vejay Vakharia
- Victor Horsley Department of Neurosurgery, National Hospital for Neurology and Neurosurgery, 33 Queen Square, London WC1N 3BG, UK.
| | - Ludvic Zrinzo
- Victor Horsley Department of Neurosurgery, National Hospital for Neurology and Neurosurgery, 33 Queen Square, London WC1N 3BG, UK; Unit of Functional Neurosurgery, UCL Queen Square Institute of Neurology, 33 Queen Square, London WC1N 3BG, UK.
| | - Harith Akram
- Victor Horsley Department of Neurosurgery, National Hospital for Neurology and Neurosurgery, 33 Queen Square, London WC1N 3BG, UK; Unit of Functional Neurosurgery, UCL Queen Square Institute of Neurology, 33 Queen Square, London WC1N 3BG, UK.
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Sone D, Ahmad M, Thompson PJ, Baxendale S, Vos SB, Xiao F, de Tisi J, McEvoy AW, Miserocchi A, Duncan JS, Koepp MJ, Galovic M. Optimal Surgical Extent for Memory and Seizure Outcome in Temporal Lobe Epilepsy. Ann Neurol 2021; 91:131-144. [PMID: 34741484 PMCID: PMC8916104 DOI: 10.1002/ana.26266] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 10/21/2021] [Accepted: 10/31/2021] [Indexed: 12/28/2022]
Abstract
OBJECTIVE Postoperative memory decline is an important consequence of anterior temporal lobe resection (ATLR) for temporal lobe epilepsy (TLE), and the extent of resection may be a modifiable factor. This study aimed to define optimal resection margins for cognitive outcome while maintaining a high rate of postoperative seizure freedom. METHODS This cohort study evaluated the resection extent on postoperative structural MRI using automated voxel-based methods and manual measurements in 142 consecutive patients with unilateral drug refractory TLE (74 left, 68 right TLE) who underwent standard ATLR. RESULTS Voxel-wise analyses revealed that postsurgical verbal memory decline correlated with resections of the posterior hippocampus and inferior temporal gyrus, whereas larger resections of the fusiform gyrus were associated with worsening of visual memory in left TLE. Limiting the posterior extent of left hippocampal resection to 55% reduced the odds of significant postoperative verbal memory decline by a factor of 8.1 (95% CI 1.5-44.4, p = 0.02). Seizure freedom was not related to posterior resection extent, but to the piriform cortex removal after left ATLR. In right TLE, variability of the posterior extent of resection was not associated with verbal and visual memory decline or seizures after surgery. INTERPRETATION The extent of surgical resection is an independent and modifiable risk factor for cognitive decline and seizures after left ATLR. Adapting the posterior extent of left ATLR might optimize postoperative outcome, with reduced risk of memory impairment while maintaining comparable seizure-freedom rates. The current, more lenient, approach might be appropriate for right ATLR. ANN NEUROL 2021.
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Affiliation(s)
- Daichi Sone
- Department of Clinical and Experimental Epilepsy, University College London Queen Square Institute of Neurology, London, UK.,Magnetic Resonance Imaging Unit, Epilepsy Society, Chalfont St Peter, UK.,Department of Psychiatry, The Jikei University School of Medicine, Tokyo, Japan
| | - Maria Ahmad
- Department of Clinical and Experimental Epilepsy, University College London Queen Square Institute of Neurology, London, UK
| | - Pamela J Thompson
- Department of Clinical and Experimental Epilepsy, University College London Queen Square Institute of Neurology, London, UK
| | - Sallie Baxendale
- Department of Clinical and Experimental Epilepsy, University College London Queen Square Institute of Neurology, London, UK
| | - Sjoerd B Vos
- Department of Clinical and Experimental Epilepsy, University College London Queen Square Institute of Neurology, London, UK.,Magnetic Resonance Imaging Unit, Epilepsy Society, Chalfont St Peter, UK.,Centre for Medical Image Computing (CMIC), University College London, London, UK.,Neuroradiological Academic Unit, UCL Queen Square Institute of Neurology, University College London, London, UK
| | - Fenglai Xiao
- Department of Clinical and Experimental Epilepsy, University College London Queen Square Institute of Neurology, London, UK.,Magnetic Resonance Imaging Unit, Epilepsy Society, Chalfont St Peter, UK
| | - Jane de Tisi
- Department of Clinical and Experimental Epilepsy, University College London Queen Square Institute of Neurology, London, UK
| | - Andrew W McEvoy
- Department of Clinical and Experimental Epilepsy, University College London Queen Square Institute of Neurology, London, UK
| | - Anna Miserocchi
- Department of Clinical and Experimental Epilepsy, University College London Queen Square Institute of Neurology, London, UK
| | - John S Duncan
- Department of Clinical and Experimental Epilepsy, University College London Queen Square Institute of Neurology, London, UK.,Magnetic Resonance Imaging Unit, Epilepsy Society, Chalfont St Peter, UK
| | - Matthias J Koepp
- Department of Clinical and Experimental Epilepsy, University College London Queen Square Institute of Neurology, London, UK.,Magnetic Resonance Imaging Unit, Epilepsy Society, Chalfont St Peter, UK
| | - Marian Galovic
- Department of Clinical and Experimental Epilepsy, University College London Queen Square Institute of Neurology, London, UK.,Magnetic Resonance Imaging Unit, Epilepsy Society, Chalfont St Peter, UK.,Department of Neurology, Clinical Neuroscience Center, University Hospital Zurich, Zurich, Switzerland
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26
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The Impact of Right Temporal Lobe Epilepsy On Nonverbal Memory: Meta-regression of Stimulus- and Task-related Moderators. Neuropsychol Rev 2021; 32:537-557. [PMID: 34559363 DOI: 10.1007/s11065-021-09514-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 05/24/2021] [Indexed: 11/08/2022]
Abstract
Nonverbal memory tests have great potential value for detecting the impact of lateralized pathology and predicting the risk of memory loss following right temporal lobe resection (TLR) for temporal lobe epilepsy (TLE) patients, but this potential has not been realized. Previous reviews suggest that stimulus type moderates the capacity of nonverbal memory tests to detect right-lateralized pathology (i.e., faces > designs), but the roles of other task-related factors have not been systematically explored. We address these limitations using mixed model meta-regression (k = 158) of right-lateralization effects (right worse than left TLE) testing the moderating effects of: 1) stimulus type (designs, faces, spatial), 2) learning format (single trial, repeated trials), 3) testing delay (immediate or long delay), and 4) testing format (recall, recognition) for three patient scenarios: 1) presurgical, 2) postsurgical, and 3) postsurgical change. Stimulus type significantly moderated the size of the right-lateralization effect (faces > designs) for postsurgical patients, test format moderated the size of the right-lateralization effect for presurgical-postsurgical change (recognition > recall) but learning format and test delay had no right-lateralization effect for either sample. For presurgical patients, none of the task-related factors significantly increased right-lateralization effects. This comprehensive review reveals the value of recognition testing in gauging the risk of nonverbal memory decline.
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27
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Mizutani M, Sone D, Sano T, Kimura Y, Maikusa N, Shigemoto Y, Goto Y, Takao M, Iwasaki M, Matsuda H, Sato N, Saito Y. Histopathological validation and clinical correlates of hippocampal subfield volumetry based on T2-weighted MRI in temporal lobe epilepsy with hippocampal sclerosis. Epilepsy Res 2021; 177:106759. [PMID: 34521044 DOI: 10.1016/j.eplepsyres.2021.106759] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 08/13/2021] [Accepted: 09/07/2021] [Indexed: 12/01/2022]
Abstract
The objectives of this study were 1) to histologically validate the hippocampal subfield volumetry based on T2-weighted MRI, and 2) to explore its clinical impact on postsurgical memory function and seizure outcome in temporal lobe epilepsy (TLE) with hippocampal sclerosis (HS). We analyzed the cases of 24 patients with medial TLE (12 left, 12 right) and HS who were preoperatively examined with T2-weighted high-resolution MRI. The volume of each hippocampal subfield was calculated with an automatic segmentation of hippocampal subfields (ASHS) program. Hippocampal sclerosis patterns were determined pathologically, and the cross-sectional area and neuronal cell density of the CA1 and CA4 subfields were calculated using tissue specimens. Pre- and postoperative memory evaluations based on the Wechsler Memory Scale-Revised (WMS-R) were performed. We compared the presurgical MRI-based volumes with the pathological measurements in each subfield and then compared them with the change in the patients' neurocognitive function. As a result, there was a significant relationship between the presurgical MRI-based volume of CA4/dentate gyrus (DG) and the cross-sectional area of CA4 calculated with tissue specimens (Spearman's rs = 0.482, p = 0.023), and a similar trend-level correlation was observed in CA1 (rs = 0.455, p = 0.058). Some of MRI-based or pathology-based parameters in the subfields preliminarily showed relationships with the postsurgical memory changes. In conclusion, automated subfield volumetry for patients with hippocampal sclerosis moderately reflects their subfield atrophy and might be useful to predict the postsurgical change of memory function in these patients.
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Affiliation(s)
- Masashi Mizutani
- Department of Laboratory Medicine, National Center of Neurology and Psychiatry, Tokyo, Japan; Department of Neuropsychiatry, Graduate School of Medicine, the University of Tokyo, Tokyo, Japan.
| | - Daichi Sone
- Integrative Brain Imaging Center, National Center of Neurology and Psychiatry, Tokyo, Japan; Department of Clinical and Experimental Epilepsy, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK; Department of Psychiatry, The Jikei University School of Medicine, 3-25-8 Nishishimbashi, Minato, Tokyo, 105-8461, Japan.
| | - Terunori Sano
- Department of Laboratory Medicine, National Center of Neurology and Psychiatry, Tokyo, Japan.
| | - Yukio Kimura
- Department of Radiology, National Center of Neurology and Psychiatry, Tokyo, Japan.
| | - Norihide Maikusa
- Department of Radiology, National Center of Neurology and Psychiatry, Tokyo, Japan.
| | - Yoko Shigemoto
- Department of Radiology, National Center of Neurology and Psychiatry, Tokyo, Japan.
| | - Yuichi Goto
- Medical Genome Center, National Center of Neurology and Psychiatry, Tokyo, Japan.
| | - Masaki Takao
- Department of Laboratory Medicine, National Center of Neurology and Psychiatry, Tokyo, Japan.
| | - Masaki Iwasaki
- Department of Neurosurgery, National Center of Neurology and Psychiatry, Tokyo, Japan.
| | - Hiroshi Matsuda
- Department of Radiology, National Center of Neurology and Psychiatry, Tokyo, Japan.
| | - Noriko Sato
- Department of Radiology, National Center of Neurology and Psychiatry, Tokyo, Japan.
| | - Yuko Saito
- Department of Laboratory Medicine, National Center of Neurology and Psychiatry, Tokyo, Japan; Department of Neuropathology, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan.
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Ljunggren S, Winblad S, Hällgren Graneheim U, Malmgren K, Ozanne A. Experiences of emotional and psychosocial functioning after frontal lobe resection for epilepsy. Epilepsy Behav 2021; 121:108077. [PMID: 34087680 DOI: 10.1016/j.yebeh.2021.108077] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 05/11/2021] [Accepted: 05/11/2021] [Indexed: 10/21/2022]
Abstract
PURPOSE Frontal lobe resection (FLR) is the second most common epilepsy surgery procedure in adults. Few studies address neuropsychological consequences after FLR. The aim of this study was to explore patients' and relatives' experiences of cognitive, emotional and social cognitive functioning after frontal lobe epilepsy surgery. METHODS Semi-structured interviews were held with 14 patients having gone through FLR as adults during the years 2000-2016 and 12 of their relatives. Interviews were audio-recorded, transcribed and analyzed with inductive qualitative content analysis. RESULTS Positive as well as negative consequences were described both by patients and relatives. Feelings of relief and an increased capacity to experience emotions of well-being were mainly experienced as related to seizure freedom. A newfound autonomy and a more grown-up identity as opposed to a self-image based on epilepsy was also highlighted. However, results also showed that even for seizure free patients, FLR could give rise to negative experiences, the most prominent of which were mental fatigue, lowered mood and social withdrawal. Coping strategies included planning ahead to avoid mental exhaustion. Over all, respondents considered that the epilepsy surgery had been a risk well worth taking and that positive consequences outweighed the negative ones. CONCLUSIONS This study shows a range of positive as well as negative outcomes after FLR for epilepsy. The findings indicate that lowered mood and mental fatigue could affect the life situation in a negative way, regardless of seizure outcome. This is important to consider in the preoperative counselling of patients and their families, as well as in the postsurgical follow-up. It is also crucial that the epilepsy surgery team has the possibility to offer rehabilitation and support to families regarding these aspects after surgery.
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Affiliation(s)
- Sofia Ljunggren
- Department of Clinical Neuroscience, Institute of Neuroscience and Physiology, Sahlgrenska Academy at Gothenburg University, Blå Stråket 7, SE-413 45 Göteborg, Sweden; Department of Neurology, Sahlgrenska University Hospital, SE-413 45 Göteborg, Sweden.
| | - Stefan Winblad
- Department of Psychology, Gothenburg University, Box 500, SE-405 30 Göteborg, Sweden.
| | - Ulla Hällgren Graneheim
- Department of Health Care Sciences, University West, SE-461 32 Trollhättan, Sweden; Department of Nursing, Umeå University, SE-901 87 Umeå, Sweden.
| | - Kristina Malmgren
- Department of Clinical Neuroscience, Institute of Neuroscience and Physiology, Sahlgrenska Academy at Gothenburg University, Blå Stråket 7, SE-413 45 Göteborg, Sweden; Department of Neurology, Sahlgrenska University Hospital, SE-413 45 Göteborg, Sweden.
| | - Anneli Ozanne
- Department of Neurology, Sahlgrenska University Hospital, SE-413 45 Göteborg, Sweden; Institute of Health and Care Sciences, Sahlgrenska Academy, University of Gothenburg, SE-413 45 Göteborg, Sweden.
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29
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Banjac S, Roger E, Cousin E, Perrone-Bertolotti M, Haldin C, Pichat C, Lamalle L, Minotti L, Kahane P, Baciu M. Interactive mapping of language and memory with the GE2REC protocol. Brain Imaging Behav 2021; 15:1562-1579. [PMID: 32761343 PMCID: PMC8286228 DOI: 10.1007/s11682-020-00355-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Previous studies have highlighted the importance of considering cognitive functions from a dynamic and interactive perspective and multiple evidence was brought for a language and memory interaction. In this study performed with healthy participants, we present a new protocol entitled GE2REC that interactively accesses the neural representation of language-and-memory network. This protocol consists of three runs related to each other, providing a link between tasks, in order to assure an interactive measure of linguistic and episodic memory processes. GE2REC consists of a sentence generation (GE) in the auditory modality and two recollecting (2REC) memory tasks, one recognition performed in the visual modality, and another one recall performed in the auditory modality. Its efficiency was evaluated in 20 healthy volunteers using a 3T MR imager. Our results corroborate the ability of GE2REC to robustly activate fronto-temporo-parietal language network as well as temporal mesial, prefrontal and parietal cortices in encoding during sentence generation and recognition. GE2REC is useful because it: (a) requires simultaneous and interactive language-and-memory processes and jointly maps their neural basis; (b) explores encoding and retrieval, managing to elicit activation of mesial temporal structures; (c) is easy to perform, hence being suitable for more restrictive settings, and (d) has an ecological dimension of tasks and stimuli. GE2REC may be useful for studying neuroplasticity of cognitive functions, especially in patients with temporal lobe epilepsy who show reorganization of both language and memory networks. Overall, GE2REC can provide valuable information in terms of the practical foundation of exploration language and memory interconnection.
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Affiliation(s)
- Sonja Banjac
- Univ. Grenoble Alpes, CNRS LPNC UMR 5105, F-38000, Grenoble, France
| | - Elise Roger
- Univ. Grenoble Alpes, CNRS LPNC UMR 5105, F-38000, Grenoble, France
| | - Emilie Cousin
- Univ. Grenoble Alpes, CNRS LPNC UMR 5105, F-38000, Grenoble, France.,Univ. Grenoble Alpes, UMS IRMaGe CHU Grenoble, F-38000, Grenoble, France
| | | | - Célise Haldin
- Univ. Grenoble Alpes, CNRS LPNC UMR 5105, F-38000, Grenoble, France
| | - Cédric Pichat
- Univ. Grenoble Alpes, CNRS LPNC UMR 5105, F-38000, Grenoble, France
| | - Laurent Lamalle
- Univ. Grenoble Alpes, UMS IRMaGe CHU Grenoble, F-38000, Grenoble, France
| | - Lorella Minotti
- Univ. Grenoble Alpes, GIN, Synchronisation et modulation des Réseaux Neuronaux dans l'Epilepsie' and Neurology Department, F-38000, Grenoble, France
| | - Philippe Kahane
- Univ. Grenoble Alpes, GIN, Synchronisation et modulation des Réseaux Neuronaux dans l'Epilepsie' and Neurology Department, F-38000, Grenoble, France
| | - Monica Baciu
- Univ. Grenoble Alpes, CNRS LPNC UMR 5105, F-38000, Grenoble, France.
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Busch RM, Hogue O, Miller M, Ferguson L, McAndrews MP, Hamberger M, Kim M, McDonald CR, Reyes A, Drane DL, Hermann BP, Bingaman W, Najm IM, Kattan MW, Jehi L. Nomograms to Predict Verbal Memory Decline After Temporal Lobe Resection in Adults With Epilepsy. Neurology 2021; 97:e263-e274. [PMID: 34011574 PMCID: PMC8302146 DOI: 10.1212/wnl.0000000000012221] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Accepted: 04/14/2021] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE To develop and externally validate models to predict the probability of postoperative verbal memory decline in adults after temporal lobe resection (TLR) for epilepsy using easily accessible preoperative clinical predictors. METHODS Multivariable models were developed to predict delayed verbal memory outcome on 3 commonly used measures: Rey Auditory Verbal Learning Test (RAVLT) and Logical Memory (LM) and Verbal Paired Associates (VPA) subtests from Wechsler Memory Scale-Third Edition. With the use of the Harrell step-down procedure for variable selection, models were developed in 359 adults who underwent TLR at the Cleveland Clinic and validated in 290 adults at 1 of 5 epilepsy surgery centers in the United States or Canada. RESULTS Twenty-nine percent of the development cohort and 26% of the validation cohort demonstrated significant decline on at least 1 verbal memory measure. Initial models had good to excellent predictive accuracy (calibration [c] statistic range 0.77-0.80) in identifying patients with memory decline; however, models slightly underestimated decline in the validation cohort. Model coefficients were updated with data from both cohorts to improve stability. The model for RAVLT included surgery side, baseline memory score, and hippocampal resection. The models for LM and VPA included surgery side, baseline score, and education. Updated model performance was good to excellent (RAVLT c = 0.81, LM c = 0.76, VPA c = 0.78). Model calibration was very good, indicating no systematic overestimation or underestimation of risk. CONCLUSIONS Nomograms are provided in 2 easy-to-use formats to assist clinicians in estimating the probability of verbal memory decline in adults considering TLR for treatment of epilepsy. CLASSIFICATION OF EVIDENCE This study provides Class II evidence that multivariable prediction models accurately predict verbal memory decline after TLR for epilepsy in adults.
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Affiliation(s)
- Robyn M Busch
- From the Epilepsy Center (R.M.B., L.F., W.B., I.M.N., L.J.) and Department of Neurology (R.M.B., M.M., I.M.N., L.J.), Neurological Institute, and Department of Quantitative Health Sciences (O.H., M.W.K.), Lerner Research Institute, Cleveland Clinic, OH; Department of Psychology (M.P.M.), University of Toronto; Krembil Brain Institute (M.P.M.), University Health Network, Toronto, Ontario, Canada; Department of Neurology (M.H.), Columbia University, New York, NY; Department of Neurology (M.K., D.L.D.), University of Washington School of Medicine, Seattle; Department of Psychiatry (C.R.M., A.R.), University of California, San Diego; Departments of Neurology and Pediatrics (D.L.D.), Emory University School of Medicine, Atlanta, GA; and Department of Neurology (B.P.H.), University of Wisconsin School of Medicine and Public Health, Madison.
| | - Olivia Hogue
- From the Epilepsy Center (R.M.B., L.F., W.B., I.M.N., L.J.) and Department of Neurology (R.M.B., M.M., I.M.N., L.J.), Neurological Institute, and Department of Quantitative Health Sciences (O.H., M.W.K.), Lerner Research Institute, Cleveland Clinic, OH; Department of Psychology (M.P.M.), University of Toronto; Krembil Brain Institute (M.P.M.), University Health Network, Toronto, Ontario, Canada; Department of Neurology (M.H.), Columbia University, New York, NY; Department of Neurology (M.K., D.L.D.), University of Washington School of Medicine, Seattle; Department of Psychiatry (C.R.M., A.R.), University of California, San Diego; Departments of Neurology and Pediatrics (D.L.D.), Emory University School of Medicine, Atlanta, GA; and Department of Neurology (B.P.H.), University of Wisconsin School of Medicine and Public Health, Madison
| | - Margaret Miller
- From the Epilepsy Center (R.M.B., L.F., W.B., I.M.N., L.J.) and Department of Neurology (R.M.B., M.M., I.M.N., L.J.), Neurological Institute, and Department of Quantitative Health Sciences (O.H., M.W.K.), Lerner Research Institute, Cleveland Clinic, OH; Department of Psychology (M.P.M.), University of Toronto; Krembil Brain Institute (M.P.M.), University Health Network, Toronto, Ontario, Canada; Department of Neurology (M.H.), Columbia University, New York, NY; Department of Neurology (M.K., D.L.D.), University of Washington School of Medicine, Seattle; Department of Psychiatry (C.R.M., A.R.), University of California, San Diego; Departments of Neurology and Pediatrics (D.L.D.), Emory University School of Medicine, Atlanta, GA; and Department of Neurology (B.P.H.), University of Wisconsin School of Medicine and Public Health, Madison
| | - Lisa Ferguson
- From the Epilepsy Center (R.M.B., L.F., W.B., I.M.N., L.J.) and Department of Neurology (R.M.B., M.M., I.M.N., L.J.), Neurological Institute, and Department of Quantitative Health Sciences (O.H., M.W.K.), Lerner Research Institute, Cleveland Clinic, OH; Department of Psychology (M.P.M.), University of Toronto; Krembil Brain Institute (M.P.M.), University Health Network, Toronto, Ontario, Canada; Department of Neurology (M.H.), Columbia University, New York, NY; Department of Neurology (M.K., D.L.D.), University of Washington School of Medicine, Seattle; Department of Psychiatry (C.R.M., A.R.), University of California, San Diego; Departments of Neurology and Pediatrics (D.L.D.), Emory University School of Medicine, Atlanta, GA; and Department of Neurology (B.P.H.), University of Wisconsin School of Medicine and Public Health, Madison
| | - Mary Pat McAndrews
- From the Epilepsy Center (R.M.B., L.F., W.B., I.M.N., L.J.) and Department of Neurology (R.M.B., M.M., I.M.N., L.J.), Neurological Institute, and Department of Quantitative Health Sciences (O.H., M.W.K.), Lerner Research Institute, Cleveland Clinic, OH; Department of Psychology (M.P.M.), University of Toronto; Krembil Brain Institute (M.P.M.), University Health Network, Toronto, Ontario, Canada; Department of Neurology (M.H.), Columbia University, New York, NY; Department of Neurology (M.K., D.L.D.), University of Washington School of Medicine, Seattle; Department of Psychiatry (C.R.M., A.R.), University of California, San Diego; Departments of Neurology and Pediatrics (D.L.D.), Emory University School of Medicine, Atlanta, GA; and Department of Neurology (B.P.H.), University of Wisconsin School of Medicine and Public Health, Madison
| | - Marla Hamberger
- From the Epilepsy Center (R.M.B., L.F., W.B., I.M.N., L.J.) and Department of Neurology (R.M.B., M.M., I.M.N., L.J.), Neurological Institute, and Department of Quantitative Health Sciences (O.H., M.W.K.), Lerner Research Institute, Cleveland Clinic, OH; Department of Psychology (M.P.M.), University of Toronto; Krembil Brain Institute (M.P.M.), University Health Network, Toronto, Ontario, Canada; Department of Neurology (M.H.), Columbia University, New York, NY; Department of Neurology (M.K., D.L.D.), University of Washington School of Medicine, Seattle; Department of Psychiatry (C.R.M., A.R.), University of California, San Diego; Departments of Neurology and Pediatrics (D.L.D.), Emory University School of Medicine, Atlanta, GA; and Department of Neurology (B.P.H.), University of Wisconsin School of Medicine and Public Health, Madison
| | - Michelle Kim
- From the Epilepsy Center (R.M.B., L.F., W.B., I.M.N., L.J.) and Department of Neurology (R.M.B., M.M., I.M.N., L.J.), Neurological Institute, and Department of Quantitative Health Sciences (O.H., M.W.K.), Lerner Research Institute, Cleveland Clinic, OH; Department of Psychology (M.P.M.), University of Toronto; Krembil Brain Institute (M.P.M.), University Health Network, Toronto, Ontario, Canada; Department of Neurology (M.H.), Columbia University, New York, NY; Department of Neurology (M.K., D.L.D.), University of Washington School of Medicine, Seattle; Department of Psychiatry (C.R.M., A.R.), University of California, San Diego; Departments of Neurology and Pediatrics (D.L.D.), Emory University School of Medicine, Atlanta, GA; and Department of Neurology (B.P.H.), University of Wisconsin School of Medicine and Public Health, Madison
| | - Carrie R McDonald
- From the Epilepsy Center (R.M.B., L.F., W.B., I.M.N., L.J.) and Department of Neurology (R.M.B., M.M., I.M.N., L.J.), Neurological Institute, and Department of Quantitative Health Sciences (O.H., M.W.K.), Lerner Research Institute, Cleveland Clinic, OH; Department of Psychology (M.P.M.), University of Toronto; Krembil Brain Institute (M.P.M.), University Health Network, Toronto, Ontario, Canada; Department of Neurology (M.H.), Columbia University, New York, NY; Department of Neurology (M.K., D.L.D.), University of Washington School of Medicine, Seattle; Department of Psychiatry (C.R.M., A.R.), University of California, San Diego; Departments of Neurology and Pediatrics (D.L.D.), Emory University School of Medicine, Atlanta, GA; and Department of Neurology (B.P.H.), University of Wisconsin School of Medicine and Public Health, Madison
| | - Anny Reyes
- From the Epilepsy Center (R.M.B., L.F., W.B., I.M.N., L.J.) and Department of Neurology (R.M.B., M.M., I.M.N., L.J.), Neurological Institute, and Department of Quantitative Health Sciences (O.H., M.W.K.), Lerner Research Institute, Cleveland Clinic, OH; Department of Psychology (M.P.M.), University of Toronto; Krembil Brain Institute (M.P.M.), University Health Network, Toronto, Ontario, Canada; Department of Neurology (M.H.), Columbia University, New York, NY; Department of Neurology (M.K., D.L.D.), University of Washington School of Medicine, Seattle; Department of Psychiatry (C.R.M., A.R.), University of California, San Diego; Departments of Neurology and Pediatrics (D.L.D.), Emory University School of Medicine, Atlanta, GA; and Department of Neurology (B.P.H.), University of Wisconsin School of Medicine and Public Health, Madison
| | - Daniel L Drane
- From the Epilepsy Center (R.M.B., L.F., W.B., I.M.N., L.J.) and Department of Neurology (R.M.B., M.M., I.M.N., L.J.), Neurological Institute, and Department of Quantitative Health Sciences (O.H., M.W.K.), Lerner Research Institute, Cleveland Clinic, OH; Department of Psychology (M.P.M.), University of Toronto; Krembil Brain Institute (M.P.M.), University Health Network, Toronto, Ontario, Canada; Department of Neurology (M.H.), Columbia University, New York, NY; Department of Neurology (M.K., D.L.D.), University of Washington School of Medicine, Seattle; Department of Psychiatry (C.R.M., A.R.), University of California, San Diego; Departments of Neurology and Pediatrics (D.L.D.), Emory University School of Medicine, Atlanta, GA; and Department of Neurology (B.P.H.), University of Wisconsin School of Medicine and Public Health, Madison
| | - Bruce P Hermann
- From the Epilepsy Center (R.M.B., L.F., W.B., I.M.N., L.J.) and Department of Neurology (R.M.B., M.M., I.M.N., L.J.), Neurological Institute, and Department of Quantitative Health Sciences (O.H., M.W.K.), Lerner Research Institute, Cleveland Clinic, OH; Department of Psychology (M.P.M.), University of Toronto; Krembil Brain Institute (M.P.M.), University Health Network, Toronto, Ontario, Canada; Department of Neurology (M.H.), Columbia University, New York, NY; Department of Neurology (M.K., D.L.D.), University of Washington School of Medicine, Seattle; Department of Psychiatry (C.R.M., A.R.), University of California, San Diego; Departments of Neurology and Pediatrics (D.L.D.), Emory University School of Medicine, Atlanta, GA; and Department of Neurology (B.P.H.), University of Wisconsin School of Medicine and Public Health, Madison
| | - William Bingaman
- From the Epilepsy Center (R.M.B., L.F., W.B., I.M.N., L.J.) and Department of Neurology (R.M.B., M.M., I.M.N., L.J.), Neurological Institute, and Department of Quantitative Health Sciences (O.H., M.W.K.), Lerner Research Institute, Cleveland Clinic, OH; Department of Psychology (M.P.M.), University of Toronto; Krembil Brain Institute (M.P.M.), University Health Network, Toronto, Ontario, Canada; Department of Neurology (M.H.), Columbia University, New York, NY; Department of Neurology (M.K., D.L.D.), University of Washington School of Medicine, Seattle; Department of Psychiatry (C.R.M., A.R.), University of California, San Diego; Departments of Neurology and Pediatrics (D.L.D.), Emory University School of Medicine, Atlanta, GA; and Department of Neurology (B.P.H.), University of Wisconsin School of Medicine and Public Health, Madison
| | - Imad M Najm
- From the Epilepsy Center (R.M.B., L.F., W.B., I.M.N., L.J.) and Department of Neurology (R.M.B., M.M., I.M.N., L.J.), Neurological Institute, and Department of Quantitative Health Sciences (O.H., M.W.K.), Lerner Research Institute, Cleveland Clinic, OH; Department of Psychology (M.P.M.), University of Toronto; Krembil Brain Institute (M.P.M.), University Health Network, Toronto, Ontario, Canada; Department of Neurology (M.H.), Columbia University, New York, NY; Department of Neurology (M.K., D.L.D.), University of Washington School of Medicine, Seattle; Department of Psychiatry (C.R.M., A.R.), University of California, San Diego; Departments of Neurology and Pediatrics (D.L.D.), Emory University School of Medicine, Atlanta, GA; and Department of Neurology (B.P.H.), University of Wisconsin School of Medicine and Public Health, Madison
| | - Michael W Kattan
- From the Epilepsy Center (R.M.B., L.F., W.B., I.M.N., L.J.) and Department of Neurology (R.M.B., M.M., I.M.N., L.J.), Neurological Institute, and Department of Quantitative Health Sciences (O.H., M.W.K.), Lerner Research Institute, Cleveland Clinic, OH; Department of Psychology (M.P.M.), University of Toronto; Krembil Brain Institute (M.P.M.), University Health Network, Toronto, Ontario, Canada; Department of Neurology (M.H.), Columbia University, New York, NY; Department of Neurology (M.K., D.L.D.), University of Washington School of Medicine, Seattle; Department of Psychiatry (C.R.M., A.R.), University of California, San Diego; Departments of Neurology and Pediatrics (D.L.D.), Emory University School of Medicine, Atlanta, GA; and Department of Neurology (B.P.H.), University of Wisconsin School of Medicine and Public Health, Madison
| | - Lara Jehi
- From the Epilepsy Center (R.M.B., L.F., W.B., I.M.N., L.J.) and Department of Neurology (R.M.B., M.M., I.M.N., L.J.), Neurological Institute, and Department of Quantitative Health Sciences (O.H., M.W.K.), Lerner Research Institute, Cleveland Clinic, OH; Department of Psychology (M.P.M.), University of Toronto; Krembil Brain Institute (M.P.M.), University Health Network, Toronto, Ontario, Canada; Department of Neurology (M.H.), Columbia University, New York, NY; Department of Neurology (M.K., D.L.D.), University of Washington School of Medicine, Seattle; Department of Psychiatry (C.R.M., A.R.), University of California, San Diego; Departments of Neurology and Pediatrics (D.L.D.), Emory University School of Medicine, Atlanta, GA; and Department of Neurology (B.P.H.), University of Wisconsin School of Medicine and Public Health, Madison
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Tyrlíková I, Hummelová Z, Goldemundová S, Koriťáková E, Nečasová T, Tyrlík M, Brázdil M, Chrastina J, Hemza J, Rektor I. Memory outcomes of temporal lobe surgery in adults aged over 45 years. Acta Neurol Scand 2021; 144:81-91. [PMID: 33881170 DOI: 10.1111/ane.13427] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 02/28/2021] [Accepted: 03/24/2021] [Indexed: 11/28/2022]
Abstract
OBJECTIVE It is assumed that temporal lobe resection in older people is associated with worse seizure outcomes and potential postsurgical memory decline. We studied postsurgical memory development and surgical efficacy in patients over 45 years of age compared with younger patients. METHODS We studied 88 patients (51 male and 37 female) after temporal lobe surgery, which involved hippocampal resection. The patients were evaluated before surgery and in the first (72 patients) and/or third (57 patients) postsurgical year. The Wechsler Memory Scale III test was performed to evaluate the MQ postsurgical development. Engel's classification was used to evaluate the postsurgical seizure outcome. RESULTS The presurgical MQ (median 88) in ≥45 years age group was significantly lower than in both younger groups (median MQ = 100 for ≤30 years age group, p = 0.002; median MQ = 107 for 31-44 years age group, p = 0.002). Three years after the surgery, the MQ decreased significantly in ≤30 years age group (p = 0.012), while only non-significant MQ decline was observed in both older groups. We found no significant impact of age on the surgical outcome. CONCLUSION Higher age at the time of surgery does not significantly increase the risk for postsurgical memory decline; however, older patients are more likely to have lowered presurgical MQ. We did not find significant differences in the impact of surgery on seizure outcome among the age groups. Epilepsy surgery appears to be a safe and effective method in the age over 45 years even though an earlier surgery should be preferred.
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Affiliation(s)
- Ivana Tyrlíková
- First Department of Neurology and Department of Neurosurgery Brno Epilepsy Center St. Anne's Hospital and School of Medicine Brno Czech Republic
- Mid‐Atlantic Epilepsy and Sleep Center Bethesda MD USA
| | - Zuzana Hummelová
- First Department of Neurology and Department of Neurosurgery Brno Epilepsy Center St. Anne's Hospital and School of Medicine Brno Czech Republic
| | - Sabina Goldemundová
- First Department of Neurology and Department of Neurosurgery Brno Epilepsy Center St. Anne's Hospital and School of Medicine Brno Czech Republic
| | - Eva Koriťáková
- Institute of Biostatistics and Analyses Faculty of Medicine Masaryk University Brno Czech Republic
| | - Tereza Nečasová
- Institute of Biostatistics and Analyses Faculty of Medicine Masaryk University Brno Czech Republic
| | - Mojmír Tyrlík
- Department of Psychological and Brain Sciences Columbian College of Arts and Sciences The George Washington University Washington DC USA
| | - Milan Brázdil
- First Department of Neurology and Department of Neurosurgery Brno Epilepsy Center St. Anne's Hospital and School of Medicine Brno Czech Republic
- Centre of Neuroscience Central European Institute of Technology (CEITEC) Masaryk University Brno Czech Republic
| | - Jan Chrastina
- First Department of Neurology and Department of Neurosurgery Brno Epilepsy Center St. Anne's Hospital and School of Medicine Brno Czech Republic
| | - Jan Hemza
- First Department of Neurology and Department of Neurosurgery Brno Epilepsy Center St. Anne's Hospital and School of Medicine Brno Czech Republic
| | - Ivan Rektor
- First Department of Neurology and Department of Neurosurgery Brno Epilepsy Center St. Anne's Hospital and School of Medicine Brno Czech Republic
- Centre of Neuroscience Central European Institute of Technology (CEITEC) Masaryk University Brno Czech Republic
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Conradi N, Rosenberg F, Knake S, Biermann L, Haag A, Gorny I, Hermsen A, von Podewils V, Behrens M, Gurschi M, du Mesnil de Rochemont R, Menzler K, Bauer S, Schubert-Bast S, Nimsky C, Konczalla J, Rosenow F, Strzelczyk A. Wada test results contribute to the prediction of change in verbal learning and verbal memory function after temporal lobe epilepsy surgery. Sci Rep 2021; 11:10979. [PMID: 34040075 PMCID: PMC8154896 DOI: 10.1038/s41598-021-90376-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Accepted: 05/07/2021] [Indexed: 02/04/2023] Open
Abstract
In recent years, the clinical usefulness of the Wada test (WT) has been debated among researchers in the field. Therefore, we aimed to assess its contribution to the prediction of change in verbal learning and verbal memory function after epilepsy surgery. Data from 56 patients with temporal lobe epilepsy who underwent WT and subsequent surgery were analyzed retrospectively. Additionally, a standard neuropsychological assessment evaluating attentional, learning and memory, visuospatial, language, and executive function was performed both before and 12 months after surgery. Hierarchical linear regression analyses were used to determine the incremental value of WT results over socio-demographic, clinical, and neuropsychological characteristics in predicting postsurgical change in patients' verbal learning and verbal memory function. The incorporation of WT results significantly improved the prediction models of postsurgical change in verbal learning (∆R2 = 0.233, p = .032) and verbal memory function (∆R2 = 0.386, p = .005). Presurgical performance and WT scores accounted for 41.8% of the variance in postsurgical change in verbal learning function, and 51.1% of the variance in postsurgical change in verbal memory function. Our findings confirm that WT results are of significant incremental value for the prediction of postsurgical change in verbal learning and verbal memory function. Thus, the WT contributes to determining the risks of epilepsy surgery and, therefore, remains an important part of the presurgical work-up of selected patients with clear clinical indications.
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Affiliation(s)
- Nadine Conradi
- Department of Neurology, Epilepsy Center Frankfurt Rhine-Main, University Hospital Frankfurt and Goethe University, Schleusenweg 2-16, 60528, Frankfurt am Main, Germany.
- LOEWE Center for Personalized Translational Epilepsy Research (CePTER), Goethe University, Frankfurt am Main, Germany.
| | - Friederike Rosenberg
- Department of Neurology, Epilepsy Center Frankfurt Rhine-Main, University Hospital Frankfurt and Goethe University, Schleusenweg 2-16, 60528, Frankfurt am Main, Germany
| | - Susanne Knake
- LOEWE Center for Personalized Translational Epilepsy Research (CePTER), Goethe University, Frankfurt am Main, Germany
- Department of Neurology, Epilepsy Center Hessen, Philipps-University Marburg, Marburg, Germany
| | - Louise Biermann
- Department of Neurology, Epilepsy Center Hessen, Philipps-University Marburg, Marburg, Germany
| | - Anja Haag
- Department of Neurology, Epilepsy Center Hessen, Philipps-University Marburg, Marburg, Germany
| | - Iris Gorny
- Department of Neurology, Epilepsy Center Hessen, Philipps-University Marburg, Marburg, Germany
| | - Anke Hermsen
- Department of Neurology, Epilepsy Center Frankfurt Rhine-Main, University Hospital Frankfurt and Goethe University, Schleusenweg 2-16, 60528, Frankfurt am Main, Germany
- LOEWE Center for Personalized Translational Epilepsy Research (CePTER), Goethe University, Frankfurt am Main, Germany
| | - Viola von Podewils
- Department of Neurology, University Medicine Greifswald, Greifswald, Germany
| | - Marion Behrens
- Department of Neurology, University Hospital Frankfurt and Goethe University, Frankfurt am Main, Germany
| | - Marianna Gurschi
- Department of Neuroradiology, Philipps-University Marburg, Marburg, Germany
| | | | - Katja Menzler
- Department of Neurology, Epilepsy Center Hessen, Philipps-University Marburg, Marburg, Germany
| | - Sebastian Bauer
- Department of Neurology, Epilepsy Center Frankfurt Rhine-Main, University Hospital Frankfurt and Goethe University, Schleusenweg 2-16, 60528, Frankfurt am Main, Germany
- LOEWE Center for Personalized Translational Epilepsy Research (CePTER), Goethe University, Frankfurt am Main, Germany
| | - Susanne Schubert-Bast
- Department of Neurology, Epilepsy Center Frankfurt Rhine-Main, University Hospital Frankfurt and Goethe University, Schleusenweg 2-16, 60528, Frankfurt am Main, Germany
- LOEWE Center for Personalized Translational Epilepsy Research (CePTER), Goethe University, Frankfurt am Main, Germany
- Department of Neuropediatrics, University Hospital Frankfurt and Goethe University, Frankfurt am Main, Germany
| | - Christopher Nimsky
- Department of Neurosurgery, Philipps-University Marburg, Marburg, Germany
| | - Jürgen Konczalla
- Department of Neurosurgery, University Hospital Frankfurt and Goethe University, Frankfurt am Main, Germany
| | - Felix Rosenow
- Department of Neurology, Epilepsy Center Frankfurt Rhine-Main, University Hospital Frankfurt and Goethe University, Schleusenweg 2-16, 60528, Frankfurt am Main, Germany
- LOEWE Center for Personalized Translational Epilepsy Research (CePTER), Goethe University, Frankfurt am Main, Germany
| | - Adam Strzelczyk
- Department of Neurology, Epilepsy Center Frankfurt Rhine-Main, University Hospital Frankfurt and Goethe University, Schleusenweg 2-16, 60528, Frankfurt am Main, Germany
- LOEWE Center for Personalized Translational Epilepsy Research (CePTER), Goethe University, Frankfurt am Main, Germany
- Department of Neurology, Epilepsy Center Hessen, Philipps-University Marburg, Marburg, Germany
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Beyond the Wada: An updated approach to pre-surgical language and memory testing: An updated review of available evaluation techniques and recommended workflow to limit Wada test use to essential clinical cases. Epilepsy Res 2021; 174:106673. [PMID: 34082393 DOI: 10.1016/j.eplepsyres.2021.106673] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 04/27/2021] [Accepted: 05/13/2021] [Indexed: 11/21/2022]
Abstract
The Intracarotid amobarbital test (IAT), also called Wada test, is considered the "gold standard" for lateralizing language dominance in the pre-surgical evaluation of patients with epilepsy. In addition, it has been further modified to assess the postoperative risk of amnesia in patients undergoing temporal lobectomy. Since then it has been utilized to lateralize language and assess pre-surgical memory function. Over the years, its popularity has declined due to several limitations and availability of alternative procedures like fMRI and MEG. A survey of its use in the pre-surgical evaluation for epilepsy surgery has not been performed since the 2008 international survey by Baxendale et al. and it was heavily skewed due to data from European and North American countries. Only approximately 12% of the epilepsy centers indicated that they used the Wada test in every patient to assess preoperative memory function and language lateralization before temporal lobectomy. Nowadays, we have many functional mapping tools at our disposal. It has become somewhat unsuitable to have epilepsy patients undergo an invasive test such as the Wada test for the risks associated with it outweigh the benefits. Our objective is to review the Wada Test and alternative methods of assessing language and memory dominance, as it is past its prime and should only be used in specific circumstances.
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Hamdi H, Albader F, Spatola G, Laguitton V, Trebuchon A, Bartolomei F, Regis J. Long-term cognitive outcome after radiosurgery in epileptic hypothalamic hamartomas and review of the literature. Epilepsia 2021; 62:1369-1381. [PMID: 33878213 DOI: 10.1111/epi.16896] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2020] [Revised: 03/17/2021] [Accepted: 03/18/2021] [Indexed: 11/25/2022]
Abstract
OBJECTIVE Epileptic patients with hypothalamic hamartoma (HH) frequently present cognitive impairments. Surgical techniques aiming at HH can be very efficient for epilepsy relief and cognitive improvement but are also demonstrated to carry a significant risk of additional reduction in memory function in these already disabled patients. Gamma knife radiosurgery (GKS) offers an efficient minimally invasive procedure. We evaluated the effect of stereotactic radiosurgery on cognitive outcome. METHODS We designed a prospective single-center case series study. Thirty-nine epileptic patients (median age = 17 years, range = 4-50) with HH underwent preoperative and postoperative testing of intelligence quotient (IQ; all patients), including a working memory component, and other memory function testing (for patients ≥16 years old). All patients were prospectively evaluated and underwent complete presurgical and postsurgical clinical, electrophysiological, endocrinal, and visual assessments. In all patients, the postoperative assessment was performed at least 3 years after radiosurgery. We explored what variables correlate with cognitive outcome. Literature review was done for other surgical techniques and their risks for cognitive complications after surgery. RESULTS No decline was observed in intellectual ability (including working memory) after GKS, and no memory decline was seen in adults. We observed significant improvement (>1 SD in z-score) in working memory index (46%) and processing speed index (35%), as well as improvement in full-scale IQ (24%), verbal comprehension index (11%), perceptual organization index (21%), verbal learning (20%), and visual learning (33%). Before GKS, the probability of seizure cessation was higher in patients with higher cognitive performance. After GKS, the cognitive improvement was significantly higher in the seizure-free patients compared to the non-seizure-free patients. SIGNIFICANCE We found clear cognitive improvement in a high percentage of patients but importantly no significant decline in intellectual ability (including working memory) and no decline in memory in adult patients 3 years after GKS. GKS compares favorably to the other surgical techniques in terms of cognitive outcome, with similar seizure freedom.
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Affiliation(s)
- Hussein Hamdi
- Department of Functional and Stereotactic Neurosurgery and Gamma Knife Radiosurgery, Timone University Hospital, Aix-Marseille University, Marseille, France.,Institute of Systems Neuroscience, Mixed Unit of Research 1106, National Institute of Health and Medical Research, Aix-Marseille University, Marseille, France.,Functional Neurosurgery and Stereotaxy Unit, Neurological Surgery Department, Tanta University, Tanta, Egypt
| | - Faisal Albader
- Department of Functional and Stereotactic Neurosurgery and Gamma Knife Radiosurgery, Timone University Hospital, Aix-Marseille University, Marseille, France
| | - Giorgio Spatola
- Department of Functional and Stereotactic Neurosurgery and Gamma Knife Radiosurgery, Timone University Hospital, Aix-Marseille University, Marseille, France
| | - Virginie Laguitton
- Institute of Systems Neuroscience, Mixed Unit of Research 1106, National Institute of Health and Medical Research, Aix-Marseille University, Marseille, France.,Department of Clinical Physiology, Mixed Unit of Research 1106, National Institute of Health and Medical Research, Timone University Hospital, Aix-Marseille University, Marseille, France
| | - Agnes Trebuchon
- Institute of Systems Neuroscience, Mixed Unit of Research 1106, National Institute of Health and Medical Research, Aix-Marseille University, Marseille, France.,Department of Clinical Physiology, Mixed Unit of Research 1106, National Institute of Health and Medical Research, Timone University Hospital, Aix-Marseille University, Marseille, France
| | - Fabrice Bartolomei
- Institute of Systems Neuroscience, Mixed Unit of Research 1106, National Institute of Health and Medical Research, Aix-Marseille University, Marseille, France.,Department of Clinical Physiology, Mixed Unit of Research 1106, National Institute of Health and Medical Research, Timone University Hospital, Aix-Marseille University, Marseille, France
| | - Jean Regis
- Department of Functional and Stereotactic Neurosurgery and Gamma Knife Radiosurgery, Timone University Hospital, Aix-Marseille University, Marseille, France.,Institute of Systems Neuroscience, Mixed Unit of Research 1106, National Institute of Health and Medical Research, Aix-Marseille University, Marseille, France
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35
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Li Q, Tavakol S, Royer J, Larivière S, Vos De Wael R, Park BY, Paquola C, Zeng D, Caldairou B, Bassett DS, Bernasconi A, Bernasconi N, Frauscher B, Smallwood J, Caciagli L, Li S, Bernhardt BC. Atypical neural topographies underpin dysfunctional pattern separation in temporal lobe epilepsy. Brain 2021; 144:2486-2498. [PMID: 33730163 DOI: 10.1093/brain/awab121] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 01/26/2021] [Accepted: 02/11/2021] [Indexed: 12/14/2022] Open
Abstract
Episodic memory is the ability to accurately remember events from our past. The process of pattern separation is hypothesized to underpin this ability and is defined as the ability to orthogonalize memory traces, to maximize the features that make them unique. Contemporary cognitive neuroscience suggests that pattern separation entails complex interactions between the hippocampus and the neocortex, where specific hippocampal subregions shape neural reinstatement in the neocortex. To test this hypothesis, the current work studied both healthy controls and patients with temporal lobe epilepsy (TLE) who present with hippocampal structural anomalies. In all participants, we measured neural activity using functional magnetic resonance imaging (fMRI) while they retrieved memorized items compared to lure items which share features with the target. Behaviorally, TLE patients were less able to exclude lures than controls, and showed a reduction in pattern separation. To assess the hypothesized relationship between neural patterns in the hippocampus and the neocortex, we identified topographic gradients of intrinsic connectivity along neocortical and hippocampal subfield surfaces and identified the topographic profile of the neural activity accompanying pattern separation. In healthy controls, pattern separation followed a graded pattern of neural activity, both along the hippocampal long axis (and peaked in anterior segments that are more heavily engaged in transmodal processing) and along the neocortical hierarchy running from unimodal to transmodal regions (peaking in transmodal default mode regions). In TLE patients, however, this concordance between task-based functional activations and topographic gradients was markedly reduced. Furthermore, person specific measures of concordance between task-related activity and connectivity gradients in patients and controls related to inter-individual differences in behavioral measures of pattern separation and episodic memory, highlighting the functional relevance of the observed topographic motifs. Our work is consistent with an emerging understanding that successful discrimination between memories with similar features entails a shift in the locus of neural activity away from sensory systems, a pattern that is mirrored along the hippocampal long axis and with respect to neocortical hierarchies. More broadly, our study establishes topographic profiling using intrinsic connectivity gradients captures the functional underpinnings of episodic memory processes in manner that is sensitive to their reorganization in pathology.
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Affiliation(s)
- Qiongling Li
- Multimodal Imaging and Connectome Analysis Laboratory, McConnell Brain Imaging Centre, Montreal Neurological Institute and Hospital, McGill University, Montreal, Canada.,School of Biological Science and Medical Engineering, Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing, 100083, China
| | - Shahin Tavakol
- Multimodal Imaging and Connectome Analysis Laboratory, McConnell Brain Imaging Centre, Montreal Neurological Institute and Hospital, McGill University, Montreal, Canada
| | - Jessica Royer
- Multimodal Imaging and Connectome Analysis Laboratory, McConnell Brain Imaging Centre, Montreal Neurological Institute and Hospital, McGill University, Montreal, Canada
| | - Sara Larivière
- Multimodal Imaging and Connectome Analysis Laboratory, McConnell Brain Imaging Centre, Montreal Neurological Institute and Hospital, McGill University, Montreal, Canada
| | - Reinder Vos De Wael
- Multimodal Imaging and Connectome Analysis Laboratory, McConnell Brain Imaging Centre, Montreal Neurological Institute and Hospital, McGill University, Montreal, Canada
| | - Bo-Yong Park
- Multimodal Imaging and Connectome Analysis Laboratory, McConnell Brain Imaging Centre, Montreal Neurological Institute and Hospital, McGill University, Montreal, Canada
| | - Casey Paquola
- Multimodal Imaging and Connectome Analysis Laboratory, McConnell Brain Imaging Centre, Montreal Neurological Institute and Hospital, McGill University, Montreal, Canada
| | - Debin Zeng
- School of Biological Science and Medical Engineering, Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing, 100083, China
| | - Benoit Caldairou
- Neuroimaging of Epilepsy Laboratory, McConnell Brain Imaging Centre, Montreal Neurological Institute and Hospital, McGill University, Montreal, Canada
| | - Danielle S Bassett
- Department of Bioengineering, University of Pennsylvania, Philadelphia, USA.,Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, USA.,Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, USA.,Department of Neurology, University of Pennsylvania, Philadelphia, USA.,Department of Psychiatry, University of Pennsylvania, Philadelphia, USA.,Santa Fe Institute, Santa Fe, New Mexico, USA
| | - Andrea Bernasconi
- Neuroimaging of Epilepsy Laboratory, McConnell Brain Imaging Centre, Montreal Neurological Institute and Hospital, McGill University, Montreal, Canada
| | - Neda Bernasconi
- Neuroimaging of Epilepsy Laboratory, McConnell Brain Imaging Centre, Montreal Neurological Institute and Hospital, McGill University, Montreal, Canada
| | - Birgit Frauscher
- Montreal Neurological Institute, McGill University, Montreal, Canada
| | | | - Lorenzo Caciagli
- Department of Bioengineering, University of Pennsylvania, Philadelphia, USA
| | - Shuyu Li
- School of Biological Science and Medical Engineering, Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing, 100083, China
| | - Boris C Bernhardt
- Multimodal Imaging and Connectome Analysis Laboratory, McConnell Brain Imaging Centre, Montreal Neurological Institute and Hospital, McGill University, Montreal, Canada
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Tracy JI, Chaudhary K, Modi S, Crow A, Kumar A, Weinstein D, Sperling MR. Computational support, not primacy, distinguishes compensatory memory reorganization in epilepsy. Brain Commun 2021; 3:fcab025. [PMID: 34222865 PMCID: PMC8244645 DOI: 10.1093/braincomms/fcab025] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 12/12/2020] [Accepted: 01/04/2021] [Indexed: 02/03/2023] Open
Abstract
Temporal lobe epilepsy is associated with impairment in episodic memory. A substantial subgroup, however, is able to maintain adequate memory despite temporal lobe pathology. Missing from prior work in cognitive reorganization is a direct comparison of temporal lobe epilepsy patients with intact status with those who are memory impaired. Little is known about the regional activations, functional connectivities and/or network reconfigurations that implement changes in primary computations or support functions that drive adaptive plasticity and compensated memory. We utilized task functional MRI on 54 unilateral temporal lobe epilepsy patients and 24 matched healthy controls during the performance of a paired-associate memory task to address three questions: (i) which regions implement paired-associate memory in temporal lobe epilepsy, and do they vary as a function of good versus poor performance, (ii) is there unique functional connectivity present during memory encoding that accounts for intact status by preservation of primary memory computations or the supportive computations that allow for intact memory responses and (iii) what features during memory encoding are most distinctive: is it the magnitude and location of regional activations, or the presence of enhanced functional connections to key structures such as the hippocampus? The study revealed non-dominant hemisphere regions (right posterior temporal regions) involving both increased regional activity and increased modulatory communication with the hippocampi as most important to intact memory in left temporal lobe epilepsy compared to impaired status. The profile involved areas that are neither contralateral homologues to left hemisphere memory areas, nor regions traditionally considered computationally primary for episodic memory. None of these areas of increased activation or functional connectivity were associated with advantaged memory in healthy controls. Our emphasis on different performance levels yielded insight into two forms of cognitive reorganization: computational primacy, where left temporal lobe epilepsy showed little change relative to healthy controls, and computational support where intact left temporal lobe epilepsy patients showed adaptive abnormalities. The analyses isolated the unique regional activations and mediating functional connectivity that implements truly compensatory reorganization in left temporal lobe epilepsy. The results provided a new perspective on memory deficits by making clear that they arise not just from the knockout of a functional hub, but from the failure to instantiate a complex set of reorganization responses. Such responses provided the computational support to ensure successful memory. We demonstrated that by keeping track of performance levels, we can increase understanding of adaptive brain responses and neuroplasticity in epilepsy.
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Affiliation(s)
- Joseph I Tracy
- Department of Neurology, Thomas Jefferson University, Philadelphia, PA 19107, USA,Correspondence to: Joseph I. Tracy, Department of Neurology, Thomas Jefferson University, 901 Walnut Street, Health Sciences Building, Suite 447, Philadelphia, PA 19107, USA. E-mail:
| | - Kapil Chaudhary
- Department of Neurology, Thomas Jefferson University, Philadelphia, PA 19107, USA
| | - Shilpi Modi
- Department of Neurology, Thomas Jefferson University, Philadelphia, PA 19107, USA
| | - Andrew Crow
- Department of Neurology, Thomas Jefferson University, Philadelphia, PA 19107, USA
| | - Ashith Kumar
- Department of Neurology, Thomas Jefferson University, Philadelphia, PA 19107, USA
| | - David Weinstein
- Department of Neurology, Thomas Jefferson University, Philadelphia, PA 19107, USA
| | - Michael R Sperling
- Department of Neurology, Thomas Jefferson University, Philadelphia, PA 19107, USA
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Consequences of mesial temporal sparing temporal lobe surgery in medically refractory epilepsy. Epilepsy Behav 2021; 115:107642. [PMID: 33360404 PMCID: PMC9940265 DOI: 10.1016/j.yebeh.2020.107642] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 11/14/2020] [Accepted: 11/16/2020] [Indexed: 02/03/2023]
Abstract
OBJECTIVE We compared long-term seizure outcome, neuropsychological outcome, and occupational outcome of anterior temporal lobectomy (ATL) with and without sparing of mesial structures to determine whether mesial sparing temporal lobectomy prevents memory decline and thus disability, with acceptable seizure outcome. METHODS We studied patients (n = 21) and controls (n = 21) with no evidence of mesial temporal sclerosis (MTS) on MRI who had surgery to treat drug-resistant epilepsy. Demographic and pre- and postsurgical clinical characteristics were compared. Patients had neuropsychological assessment before and after surgery. Neuropsychological analyses were limited to patients with left-sided surgery and available data (n = 14 in each group) as they were at risk of verbal memory impairment. The California Verbal Learning Test II (CVLT-II) (sum of trials 1-5, delayed free recall) and the Logical Memory subtest of the Wechsler Memory Scale III or IV (WMS-III or WMS-IV) (learning and delayed recall of prose passages) were used to assess verbal episodic learning and memory. Seizure and occupational outcomes were assessed. RESULTS The chance of attaining seizure freedom was similar in the two groups, so sparing mesial temporal structures did not lessen the chance of stopping seizures. Sparing mesial temporal structures mitigated the extent of postoperative verbal memory impairment, though some of these individuals suffered decline as a consequence of surgery. Occupational outcome was similar in both groups. SIGNIFICANCE Mesial temporal sparing resections provide a similar seizure outcome as ATL, while producing a better memory outcome. Anterior temporal lobectomy including mesial structure resection did not increase the risk of postoperative disability.
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The association of cognitive phenotypes with postoperative outcomes after epilepsy surgery in patients with temporal lobe epilepsy. Epilepsy Behav 2020; 112:107386. [PMID: 32911298 DOI: 10.1016/j.yebeh.2020.107386] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 07/25/2020] [Accepted: 07/26/2020] [Indexed: 01/21/2023]
Abstract
INTRODUCTION The concept of cognitive phenotypes has been developed to categorize the heterogeneity of neuropsychological profiles in patients with temporal lobe epilepsy (TLE). This study examines the utility of cognitive phenotypes derived from clinical criteria in the prediction of postoperative outcomes. METHODS Scores from 9 standardized neuropsychological tests were used to sample preoperative performance in 4 core domains (intellectual, memory, language, & executive function) in 445 patients with TLE (206 right: 236 left). Patients were grouped into 3 clinical phenotypes using clinical criteria: 1. intact cognition, 2. isolated memory and/or language impairment, and 3. widespread impairment. Patients who did not meet the criteria for these phenotypes were characterized as having a mixed profile phenotype. RESULTS Approximately half of the sample had intact cognitive function, with one-quarter demonstrating isolated impairments in language and memory function. The remainder demonstrated widespread impairment or a mixed pattern of cognitive impairments. The clinically derived cognitive phenotypes were associated with demographic and clinical characteristics. Patients with widespread cognitive impairments had an earlier onset of seizures than those with other cognitive phenotypes. They also reported higher levels of depression. Higher levels of anxiety were reported in those with isolated memory/language impairments. Phenotypes were not associated with postoperative seizure outcome or postoperative declines in verbal memory or language function, but an intact phenotype was associated with a greater risk of decline in visual learning than right-sided surgery. CONCLUSIONS Distinct cognitive phenotypes in TLE can be identified using clinical criteria and may reflect neurodevelopmental influences and mood in addition to progression of the disease. Phenotype may be a more powerful predictor of postoperative decline in visual memory than laterality of surgery.
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Tailby C, Collins AJ, Vaughan DN, Abbott DF, O'Shea M, Helmstaedter C, Jackson GD. Teleneuropsychology in the time of COVID-19: The experience of The Australian Epilepsy Project. Seizure 2020; 83:89-97. [PMID: 33120327 PMCID: PMC7561524 DOI: 10.1016/j.seizure.2020.10.005] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 09/30/2020] [Accepted: 10/10/2020] [Indexed: 01/17/2023] Open
Abstract
PURPOSE Traditional neuropsychological testing carries elevated COVID-19 risk for both examinee and examiner. Here we describe how the pilot study of the Australian Epilepsy Project (AEP) has transitioned to tele-neuropsychology (teleNP), enabling continued safe operations during the pandemic. METHODS The AEP includes adults (age 18-60) with a first unprovoked seizure, new diagnosis of epilepsy or drug resistant focal epilepsy. Shortly after launching the study, COVID-related restrictions necessitated adaptation to teleNP, including delivery of verbal tasks via videoconference; visual stimulus delivery via document camera; use of web-hosted, computerised assessment; substitution of oral versions for written tests; online delivery of questionnaires; and discontinuation of telehealth incompatible tasks. RESULTS To date, we have completed 24 teleNP assessments: 18 remotely (participant in own home) and six on-site (participant using equipment at research facility). Five face-to-face assessments were conducted prior to the transition to teleNP. Eight of 408 tests administered via teleNP (1.9 %) have been invalidated, for a variety of reasons (technical, procedural, environmental). Data confirm typical patterns of epilepsy-related deficits (p < .05) affecting processing speed, executive function, language and memory. Questionnaire responses indicate elevated rates of patients at high risk of mood (34 %) and anxiety disorder (38 %). CONCLUSION Research teleNP assessments reveal a typical pattern of impairments in epilepsy. A range of issues must be considered when introducing teleNP, such as technical and administrative set up, test selection and delivery, and cohort suitability. TeleNP enables large-scale neuropsychological research during periods of social distancing (and beyond), and offers an opportunity to expand the reach and breadth of neuropsychological services.
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Affiliation(s)
- Chris Tailby
- The Florey Institute of Neuroscience and Mental Health, Heidelberg, Australia; Department of Clinical Neuropsychology, Austin Health, Heidelberg, Australia.
| | - Alana J Collins
- The Florey Institute of Neuroscience and Mental Health, Heidelberg, Australia
| | - David N Vaughan
- The Florey Institute of Neuroscience and Mental Health, Heidelberg, Australia; Department of Neurology, Austin Health, Heidelberg, Australia
| | - David F Abbott
- The Florey Institute of Neuroscience and Mental Health, Heidelberg, Australia; The Florey Department of Neuroscience and Mental Health, Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Parkville, Australia
| | - Marie O'Shea
- Department of Clinical Neuropsychology, Austin Health, Heidelberg, Australia; School of Psychological Sciences, University of Melbourne, Parkville, Australia
| | | | - Graeme D Jackson
- The Florey Institute of Neuroscience and Mental Health, Heidelberg, Australia; Department of Neurology, Austin Health, Heidelberg, Australia; The Florey Department of Neuroscience and Mental Health, Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Parkville, Australia
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Baxendale S. Cognitive rehabilitation and prehabilitation in people with epilepsy. Epilepsy Behav 2020; 106:107027. [PMID: 32208338 DOI: 10.1016/j.yebeh.2020.107027] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 03/04/2020] [Accepted: 03/04/2020] [Indexed: 02/07/2023]
Abstract
Epilepsy is now recognized as a network disorder of the brain that can impact cognition beyond the periictal disturbance associated with seizures. While there is a large literature on the assessment of cognitive functions, particularly memory, in people with epilepsy, there are far fewer studies looking at the efficacy of treatments for cognitive dysfunction in this population. Reviews of the cognitive rehabilitation literature in epilepsy have begun to outnumber original studies. This paper examines the possible reasons for this unsatisfactory ratio in the literature and examines the unique challenges and opportunities for cognitive rehabilitation in this population, with a particular focus on epilepsy surgical candidates. The concept of prehabilitation in this population is described. While traditional cognitive rehabilitation is implemented after a patient has developed a neuropsychological deficit, in surgical candidates, prehabilitation uses intact functions before they are lost to establish compensatory strategies and routines prior to surgery in preparation for postoperative changes. The likely postoperative neuropsychological profile for individual patients can now be modeled using preoperative data. These predictions can guide and inform the prehabilitation process. Rather than concluding with a generic call for more research, the paper presents a framework for a rehabilitation program with practical solutions to address cognitive difficulties in both surgical and nonsurgical populations of people with epilepsy.
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Affiliation(s)
- Sallie Baxendale
- Department of Clinical and Experimental Epilepsy, Institute of Neurology, UCL, UK; Epilepsy Society, Chalfont St Peter, Buckinghamshire, UK; University College Hospital, London, UK.
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Gonzalez LM, Wrennall JA. A neuropsychological model for the pre-surgical evaluation of children with focal-onset epilepsy: An integrated approach. Seizure 2020; 77:29-39. [DOI: 10.1016/j.seizure.2018.12.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Revised: 11/28/2018] [Accepted: 12/17/2018] [Indexed: 12/20/2022] Open
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Buck S, Sidhu MK. A Guide to Designing a Memory fMRI Paradigm for Pre-surgical Evaluation in Temporal Lobe Epilepsy. Front Neurol 2020; 10:1354. [PMID: 31998216 PMCID: PMC6962296 DOI: 10.3389/fneur.2019.01354] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Accepted: 12/09/2019] [Indexed: 12/05/2022] Open
Abstract
There has been increasing interest in the clinical and experimental use of memory functional Magnetic Resonance Imaging (fMRI). The 2017 American Academy of Neurology practice guidelines on the use of pre-surgical cognitive fMRI suggests that verbal memory fMRI could be used to lateralize memory functions in people with Temporal Lobe Epilepsy (TLE) and should be used to predict post-operative verbal memory outcome. There are however technical and methodological considerations, to optimize both the sensitivity and specificity of this imaging modality. Below we discuss these constraints and suggest recommendations to consider when designing a memory fMRI paradigm.
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Affiliation(s)
- Sarah Buck
- Department of Clinical and Experimental Epilepsy, UCL Institute of Neurology of Neurology, London, United Kingdom
- Epilepsy Society MRI Unit, Chalfont Saint Peter, United Kingdom
| | - Meneka K. Sidhu
- Department of Clinical and Experimental Epilepsy, UCL Institute of Neurology of Neurology, London, United Kingdom
- Epilepsy Society MRI Unit, Chalfont Saint Peter, United Kingdom
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Bauman K, Devinsky O, Liu AA. Temporal lobe surgery and memory: Lessons, risks, and opportunities. Epilepsy Behav 2019; 101:106596. [PMID: 31711868 PMCID: PMC6885125 DOI: 10.1016/j.yebeh.2019.106596] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 10/04/2019] [Accepted: 10/04/2019] [Indexed: 11/19/2022]
Abstract
Careful study of the clinical outcomes of temporal lobe epilepsy (TLE) surgery has greatly advanced our knowledge of the neuroanatomy of human memory. After early cases resulted in profound amnesia, the critical role of the hippocampus and associated medial temporal lobe (MTL) structures to declarative memory became evident. Surgical approaches quickly changed to become unilateral and later, to be more precise, potentially reducing cognitive morbidity. Neuropsychological studies following unilateral temporal lobe resection (TLR) have challenged early models, which simplified the lateralization of verbal and visual memory function. Diagnostic tests, including intracarotid sodium amobarbital procedure (WADA), structural magnetic resonance imaging (MRI), and functional neuroimaging (functional MRI (fMRI), positron emission tomography (PET), and single-photon emission computed tomography (SPECT)), can more accurately lateralize and localize epileptogenic cortex and predict memory outcomes from surgery. Longitudinal studies have shown that memory may even improve in seizure-free patients. From 70 years of experience with epilepsy surgery, we now have a richer understanding of the clinical, neuroimaging, and surgical predictors of memory decline-and improvement-after TLR. "Special Issue: Epilepsy & Behavior's 20th Anniversary".
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Affiliation(s)
- Kristie Bauman
- NYU Langone Health, Department of Neurology, 222 East 41st Street 9th Floor, New York, NY 10017, United States of America
| | - Orrin Devinsky
- NYU Langone Health, Department of Neurology, 222 East 41st Street 9th Floor, New York, NY 10017, United States of America; NYU Comprehensive Epilepsy Center, 223 East 34th Street, New York, NY 10016, United States of America
| | - Anli A Liu
- NYU Langone Health, Department of Neurology, 222 East 41st Street 9th Floor, New York, NY 10017, United States of America; NYU Comprehensive Epilepsy Center, 223 East 34th Street, New York, NY 10016, United States of America.
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Danguecan AN, Smith ML. Verbal associative memory outcomes in pediatric surgical temporal lobe epilepsy: Exploring the impact of mesial structures. Epilepsy Behav 2019; 101:106529. [PMID: 31678810 DOI: 10.1016/j.yebeh.2019.106529] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 08/21/2019] [Accepted: 08/28/2019] [Indexed: 11/19/2022]
Abstract
OBJECTIVE We examined verbal associative memory outcomes in children with left- or right-sided temporal lobe epilepsy (TLE) who received combined lateral and mesial resections versus lateral resections sparing mesial structures. We hypothesized that children who underwent left-sided resections including mesial structures would show the greatest verbal associative memory declines following surgery. METHOD We retrospectively analyzed neuropsychology assessment results from a sample of 65 children with TLE who completed pre- and postoperative evaluation at the Hospital for Sick Children in Toronto, Canada. We examined verbal associative memory score changes between groups by laterality (left versus right) and resection type (lateral only versus lateral and mesial resection). We also explored potential associations between certain epilepsy-related characteristics and verbal associative memory changes. RESULTS Postoperative decline was found in children with left-sided resections, but not those with right-sided resections. In children who received left-sided resections, there was some suggestion of verbal associative memory decline in those who had both lateral and mesial tissues excised, but not in those with lateral resections only. Notably, there was also a language dominance (typical versus atypical) by resection type interaction. Specifically, for the typical language group, children with left lateral plus mesial resections (but not mesial sparing resections) showed postoperative verbal associative memory declines, whereas the opposite was true for the atypical language group. SIGNIFICANCE These data contribute to our growing understanding of verbal memory outcomes following TLE in childhood, with consideration of the extent of resection to mesial structures. Our findings also highlight the importance of language laterality when interpreting neuropsychological assessment findings and making predictions regarding risk of functional loss following surgery.
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Affiliation(s)
- Ashley N Danguecan
- Department of Psychology, The Hospital for Sick Children, 555 University Ave, Toronto, ON M5G 1X8, Canada.
| | - Mary Lou Smith
- Department of Psychology, The Hospital for Sick Children, 555 University Ave, Toronto, ON M5G 1X8, Canada; Department of Psychology, University of Toronto Mississauga, Mississauga, Canada; Neurosciences and Mental Health Program, The Hospital for Sick Children, Toronto, Canada.
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Parra-Díaz P, García-Casares N. Evaluación de la memoria en la epilepsia del lóbulo temporal para predecir sus cambios tras la cirugía. Una revisión sistemática. Neurologia 2019; 34:596-606. [DOI: 10.1016/j.nrl.2017.02.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Revised: 02/12/2017] [Accepted: 02/17/2017] [Indexed: 10/19/2022] Open
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Ljunggren S, Andersson‐Roswall L, Imberg H, Samuelsson H, Malmgren K. Predicting verbal memory decline following temporal lobe resection for epilepsy. Acta Neurol Scand 2019; 140:312-319. [PMID: 31273754 DOI: 10.1111/ane.13146] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Accepted: 06/26/2019] [Indexed: 11/30/2022]
Abstract
OBJECTIVES The aim of the study was to develop a prediction model for verbal memory decline after temporal lobe resection (TLR) for epilepsy. The model will be used in the preoperative counselling of patients to give individualized information about risk for verbal memory decline. MATERIALS AND METHODS A sample of 110 consecutive patients who underwent TLR for epilepsy at Sahlgrenska University Hospital between 1987 and 2011 constituted the basis for the prediction model. They had all gone through a formal neuropsychological assessment before surgery and 2 years after. Penalized regression and 20 × 10-fold cross-validation were used in order to build a reliable model for predicting individual risks. RESULTS The final model included four predictors: side of surgery; inclusion or not of the hippocampus in the resection; preoperative verbal memory function; and presence/absence of focal to bilateral tonic-clonic seizures (TCS) the last year prior to the presurgical investigation. The impact of a history of TCS is a new finding which we interpret as a sign of a more widespread network disease which influences neuropsychological function and the cognitive reserve. The model correctly identified 82% of patients with post-operative decline in verbal memory, and the overall accuracy was 70%-85% depending on choice of risk thresholds. CONCLUSIONS The model makes it possible to provide patients with individualized prediction regarding the risk of verbal memory decline following TLR. This will help them make more informed decisions regarding treatment, and it will also enable the epilepsy surgery team to prepare them better for the rehabilitation process.
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Affiliation(s)
- Sofia Ljunggren
- Department of Clinical Neuroscience, Institute of Neuroscience and Physiology Sahlgrenska Academy at the University of Gothenburg Gothenburg Sweden
| | - Lena Andersson‐Roswall
- Department of Clinical Neuroscience, Institute of Neuroscience and Physiology Sahlgrenska Academy at the University of Gothenburg Gothenburg Sweden
| | - Henrik Imberg
- Statistiska Konsultgruppen Gothenburg Sweden
- Department of Mathematical Sciences Chalmers University of Technology and the University of Gothenburg Gothenburg Sweden
| | - Hans Samuelsson
- Department of Clinical Neuroscience, Institute of Neuroscience and Physiology Sahlgrenska Academy at the University of Gothenburg Gothenburg Sweden
- Department of Psychology University of Gothenburg Gothenburg Sweden
| | - Kristina Malmgren
- Department of Clinical Neuroscience, Institute of Neuroscience and Physiology Sahlgrenska Academy at the University of Gothenburg Gothenburg Sweden
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Parra-Díaz P, García-Casares N. Memory assessment in patients with temporal lobe epilepsy to predict memory impairment after surgery: a systematic review. NEUROLOGÍA (ENGLISH EDITION) 2019. [DOI: 10.1016/j.nrleng.2017.02.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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Caciagli L, Wandschneider B, Xiao F, Vollmar C, Centeno M, Vos SB, Trimmel K, Sidhu MK, Thompson PJ, Winston GP, Duncan JS, Koepp MJ. Abnormal hippocampal structure and function in juvenile myoclonic epilepsy and unaffected siblings. Brain 2019; 142:2670-2687. [PMID: 31365054 PMCID: PMC6776114 DOI: 10.1093/brain/awz215] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Revised: 04/09/2019] [Accepted: 05/27/2019] [Indexed: 02/05/2023] Open
Abstract
Juvenile myoclonic epilepsy is the most common genetic generalized epilepsy syndrome, characterized by a complex polygenetic aetiology. Structural and functional MRI studies demonstrated mesial or lateral frontal cortical derangements and impaired fronto-cortico-subcortical connectivity in patients and their unaffected siblings. The presence of hippocampal abnormalities and associated memory deficits is controversial, and functional MRI studies in juvenile myoclonic epilepsy have not tested hippocampal activation. In this observational study, we implemented multi-modal MRI and neuropsychological data to investigate hippocampal structure and function in 37 patients with juvenile myoclonic epilepsy, 16 unaffected siblings and 20 healthy controls, comparable for age, gender, handedness and hemispheric dominance as assessed with language laterality indices. Automated hippocampal volumetry was complemented by validated qualitative and quantitative morphological criteria to detect hippocampal malrotation, assumed to represent a neurodevelopmental marker. Neuropsychological measures of verbal and visuo-spatial learning and an event-related verbal and visual memory functional MRI paradigm addressed mesiotemporal function. We detected a reduction of mean left hippocampal volume in patients and their siblings compared with controls (P < 0.01). Unilateral or bilateral hippocampal malrotation was identified in 51% of patients and 50% of siblings, against 15% of controls (P < 0.05). For bilateral hippocampi, quantitative markers of verticalization had significantly larger values in patients and siblings compared with controls (P < 0.05). In the patient subgroup, there was no relationship between structural measures and age at disease onset or degree of seizure control. No overt impairment of verbal and visual memory was identified with neuropsychological tests. Functional mapping highlighted atypical patterns of hippocampal activation, pointing to abnormal recruitment during verbal encoding in patients and their siblings [P < 0.05, familywise error (FWE)-corrected]. Subgroup analyses indicated distinct profiles of hypoactivation along the hippocampal long axis in juvenile myoclonic epilepsy patients with and without malrotation; patients with malrotation also exhibited reduced frontal recruitment for verbal memory, and more pronounced left posterior hippocampal involvement for visual memory. Linear models across the entire study cohort indicated significant associations between morphological markers of hippocampal positioning and hippocampal activation for verbal items (all P < 0.05, FWE-corrected). We demonstrate abnormalities of hippocampal volume, shape and positioning in patients with juvenile myoclonic epilepsy and their siblings, which are associated with reorganization of function and imply an underlying neurodevelopmental mechanism with expression during the prenatal stage. Co-segregation of abnormal hippocampal morphology in patients and their siblings is suggestive of a genetic imaging phenotype, independent of disease activity, and can be construed as a novel endophenotype of juvenile myoclonic epilepsy.
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Affiliation(s)
- Lorenzo Caciagli
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, Queen Square, London, UK
- MRI Unit, Epilepsy Society, Chalfont St Peter, Buckinghamshire, UK
| | - Britta Wandschneider
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, Queen Square, London, UK
- MRI Unit, Epilepsy Society, Chalfont St Peter, Buckinghamshire, UK
| | - Fenglai Xiao
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, Queen Square, London, UK
- MRI Unit, Epilepsy Society, Chalfont St Peter, Buckinghamshire, UK
- Department of Neurology, West China Hospital of Sichuan University, Chengdu, Sichuan, China
| | - Christian Vollmar
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, Queen Square, London, UK
- MRI Unit, Epilepsy Society, Chalfont St Peter, Buckinghamshire, UK
- Department of Neurology, Ludwig-Maximilians-Universität, Marchioninistrasse 15, Munich, Germany
| | - Maria Centeno
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, Queen Square, London, UK
- MRI Unit, Epilepsy Society, Chalfont St Peter, Buckinghamshire, UK
| | - Sjoerd B Vos
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, Queen Square, London, UK
- MRI Unit, Epilepsy Society, Chalfont St Peter, Buckinghamshire, UK
- Wellcome/EPSRC Centre for Interventional and Surgical Sciences, University College London, London, UK
- Centre for Medical Image Computing, University College London, London, UK
| | - Karin Trimmel
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, Queen Square, London, UK
- MRI Unit, Epilepsy Society, Chalfont St Peter, Buckinghamshire, UK
- Department of Neurology, Medical University of Vienna, Vienna, Austria
| | - Meneka K Sidhu
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, Queen Square, London, UK
- MRI Unit, Epilepsy Society, Chalfont St Peter, Buckinghamshire, UK
| | - Pamela J Thompson
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, Queen Square, London, UK
- MRI Unit, Epilepsy Society, Chalfont St Peter, Buckinghamshire, UK
| | - Gavin P Winston
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, Queen Square, London, UK
- MRI Unit, Epilepsy Society, Chalfont St Peter, Buckinghamshire, UK
- Department of Medicine, Division of Neurology, Queen’s University, Kingston, Ontario, Canada
| | - John S Duncan
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, Queen Square, London, UK
- MRI Unit, Epilepsy Society, Chalfont St Peter, Buckinghamshire, UK
| | - Matthias J Koepp
- Department of Clinical and Experimental Epilepsy, UCL Queen Square Institute of Neurology, Queen Square, London, UK
- MRI Unit, Epilepsy Society, Chalfont St Peter, Buckinghamshire, UK
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Sveikata L, Kavan N, Pegna AJ, Seeck M, Assal F, Momjian S, Schaller K, Vulliemoz S. Postoperative memory prognosis in temporal lobe epilepsy surgery: The contribution of postictal memory. Epilepsia 2019; 60:1639-1649. [PMID: 31329286 DOI: 10.1111/epi.16281] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 06/13/2019] [Accepted: 06/18/2019] [Indexed: 11/27/2022]
Abstract
OBJECTIVE The prediction of verbal memory decline after temporal lobe epilepsy (TLE) surgery remains difficult at an individual level. We evaluated the prognostic value of postictal memory testing in predicting the postoperative verbal memory function. METHODS Sixty-three consecutive patients were included in the analysis who underwent TLE surgery at our center with preoperative interictal/postictal and postoperative memory testing. Verbal memory was evaluated using the Rey Auditory Verbal Learning Test (RAVLT). We used reliable change indices with 90% confidence interval (90% RCIs) to evaluate a significant postoperative memory decline. The sensitivity (Sn), specificity (Sp), positive predictive value (PPV), negative predictive value (NPV), area under the curve (AUC), and accuracy (ACC) were calculated. The analysis was performed for all TLE patients and for the subgroup with hippocampal sclerosis (HS). RESULTS Left-TLE patients (n = 31) had lower verbal memory scores on RAVLT than right-TLE at 3 months (57% vs 78%) and 12 months (53% vs 78%) after surgery. The 90% RCI was estimated to be a loss of 4 out of 15 items. The predictive value was Sn = 42%, Sp = 84%, PPV = 39%, NPV = 86%, AUC = 0.630, and ACC = 76% to predict a verbal memory decline in the whole group (n = 63). In HS patients (n = 41), the postictal verbal memory test had Sn = 50%, Sp = 88%, PPV = 50%, NPV = 88%, AUC = 0.689, and ACC = 81% to predict a significant postoperative decline. SIGNIFICANCE Postictal memory is a noninvasive bedside memory test that can help predict the postoperative verbal memory decline in patients with HS with an overall accuracy of 81%.
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Affiliation(s)
- Lukas Sveikata
- Division of Neurology, Department of Clinical Neurosciences, Geneva University Hospitals and Faculty of Medicine, Geneva, Switzerland
| | - Nicole Kavan
- Neuropsychology Unit, Department of Clinical Neurosciences, Geneva University Hospitals and Faculty of Medicine, Geneva, Switzerland
| | - Alan J Pegna
- Neuropsychology Unit, Department of Clinical Neurosciences, Geneva University Hospitals and Faculty of Medicine, Geneva, Switzerland.,School of Psychology, University of Queensland, Brisbane, Queensland, Australia
| | - Margitta Seeck
- Division of Neurology, Department of Clinical Neurosciences, Geneva University Hospitals and Faculty of Medicine, Geneva, Switzerland
| | - Frederic Assal
- Division of Neurology, Department of Clinical Neurosciences, Geneva University Hospitals and Faculty of Medicine, Geneva, Switzerland
| | - Shahan Momjian
- Division of Neurosurgery, Department of Clinical Neurosciences, Geneva University Hospitals and Faculty of Medicine, Geneva, Switzerland
| | - Karl Schaller
- Division of Neurosurgery, Department of Clinical Neurosciences, Geneva University Hospitals and Faculty of Medicine, Geneva, Switzerland
| | - Serge Vulliemoz
- Division of Neurology, Department of Clinical Neurosciences, Geneva University Hospitals and Faculty of Medicine, Geneva, Switzerland
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50
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Elverman KH, Resch ZJ, Quasney EE, Sabsevitz DS, Binder JR, Swanson SJ. Temporal lobe epilepsy is associated with distinct cognitive phenotypes. Epilepsy Behav 2019; 96:61-68. [PMID: 31077942 DOI: 10.1016/j.yebeh.2019.04.015] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 04/09/2019] [Accepted: 04/10/2019] [Indexed: 10/26/2022]
Abstract
Neuropsychological assessment is critical for understanding the impact of seizures on cognition and informing treatment decisions. While focus is often placed on examining groups based on seizure type/epilepsy syndrome, an alternate approach emphasizes empirically derived groups based solely on cognitive performance. This approach has been used to identify cognitive phenotypes in temporal lobe epilepsy (TLE). The current study sought to replicate prior work by Hermann and colleagues (2007) and identify cognitive phenotypes in a separate, larger cohort of 185 patients with TLE (92 left TLE, 93 right TLE). Cluster analysis revealed 3- and 4-cluster solutions, with clusters differentiated primarily by overall level of performance in the 3-cluster solution (Low, Middle, and High performance) and by more varying cognitive phenotypes in the 4-cluster solution (Globally Low, Low Executive Functioning/Speed, Low Language/Memory, and Globally High). Differences in cognitive performance as well as demographic and clinical seizure variables are presented. A greater proportion of the patients with left TLE were captured by Cluster 3 (Low Language/Memory) than by the other 3 clusters, though this cluster captured only approximately one-third of the overall group with left TLE. Consistent with prior findings, executive functioning and speed emerged as additional domains of interest in this sample of patients with TLE. The current results extend prior work examining cognitive phenotypes in TLE and highlight the importance of identifying the comprehensive range of potential cognitive profiles in TLE.
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Affiliation(s)
- Kathleen H Elverman
- Medical College of Wisconsin, Department of Neurology, United States of America
| | - Zachary J Resch
- Rosalind Franklin University of Medicine and Science, United States of America
| | - Erin E Quasney
- Medical College of Wisconsin, Department of Neurology, United States of America
| | - David S Sabsevitz
- Medical College of Wisconsin, Department of Neurology, United States of America
| | - Jeffrey R Binder
- Medical College of Wisconsin, Department of Neurology, United States of America
| | - Sara J Swanson
- Medical College of Wisconsin, Department of Neurology, United States of America.
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