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Eriksson MH, Prentice F, Piper RJ, Wagstyl K, Adler S, Chari A, Booth J, Moeller F, Das K, Eltze C, Cooray G, Perez Caballero A, Menzies L, McTague A, Shavel-Jessop S, Tisdall MM, Cross JH, Martin Sanfilippo P, Baldeweg T. Long-term neuropsychological trajectories in children with epilepsy: does surgery halt decline? Brain 2024; 147:2791-2802. [PMID: 38643018 PMCID: PMC11292899 DOI: 10.1093/brain/awae121] [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: 11/11/2023] [Revised: 02/29/2024] [Accepted: 03/16/2024] [Indexed: 04/22/2024] Open
Abstract
Neuropsychological impairments are common in children with drug-resistant epilepsy. It has been proposed that epilepsy surgery might alleviate these impairments by providing seizure freedom; however, findings from prior studies have been inconsistent. We mapped long-term neuropsychological trajectories in children before and after undergoing epilepsy surgery, to measure the impact of disease course and surgery on functioning. We performed a retrospective cohort study of 882 children who had undergone epilepsy surgery at Great Ormond Street Hospital (1990-2018). We extracted patient information and neuropsychological functioning [obtained from IQ tests (domains: full-scale IQ, verbal IQ, performance IQ, working memory and processing speed) and tests of academic attainment (reading, spelling and numeracy)] and investigated changes in functioning using regression analyses. We identified 500 children (248 females) who had undergone epilepsy surgery [median age at surgery = 11.9 years, interquartile range = (7.8, 15.0)] and neuropsychological assessment. These children showed declines in all domains of neuropsychological functioning in the time leading up to surgery (all P-values ≤0.001; e.g. βFSIQ = -1.9, SEFSIQ = 0.3, PFSIQ < 0.001). Children lost on average one to four points per year, depending on the domain considered; 27%-43% declined by ≥10 points from their first to their last preoperative assessment. At the time of presurgical evaluation, most children (46%-60%) scored one or more standard deviations below the mean (<85) on the different neuropsychological domains; 37% of these met the threshold for intellectual disability (full-scale IQ < 70). On a group level, there was no change in performance from pre- to postoperative assessment on any of the domains (all P-values ≥0.128). However, children who became seizure free through surgery showed higher postoperative neuropsychological performance (e.g. rrb-FSIQ = 0.37, P < 0.001). These children continued to demonstrate improvements in neuropsychological functioning over the course of their long-term follow-up (e.g. βFSIQ = 0.9, SEFSIQ = 0.3, PFSIQ = 0.004). Children who had discontinued antiseizure medication treatment at 1-year follow-up showed an 8- to 13-point advantage in postoperative working memory, processing speed and numeracy, and greater improvements in verbal IQ, working memory, reading and spelling (all P-values ≤0.034) over the postoperative period compared with children who were seizure free and still receiving antiseizure medication. In conclusion, by providing seizure freedom and the opportunity for antiseizure medication cessation, epilepsy surgery might not only halt but reverse the downward trajectory that children with drug-resistant epilepsy display in neuropsychological functioning. To halt this decline as soon as possible or, potentially, to prevent it from occurring in the first place, children with focal epilepsy should be considered for epilepsy surgery as early as possible after diagnosis.
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Affiliation(s)
- Maria H Eriksson
- Developmental Neurosciences Research and Teaching Department, UCL Great Ormond Street Institute of Child Health, London, WC1N 1EH, UK
- Department of Neuropsychology, Great Ormond Street Hospital for Children, London, WC1N 3JH, UK
- Department of Neurology, Great Ormond Street Hospital for Children, London, WC1N 3JH, UK
| | - Freya Prentice
- Developmental Neurosciences Research and Teaching Department, UCL Great Ormond Street Institute of Child Health, London, WC1N 1EH, UK
- Department of Neuropsychology, Great Ormond Street Hospital for Children, London, WC1N 3JH, UK
| | - Rory J Piper
- Developmental Neurosciences Research and Teaching Department, UCL Great Ormond Street Institute of Child Health, London, WC1N 1EH, UK
- Department of Neurosurgery, Great Ormond Street Hospital for Children, London, WC1N 3JH, UK
| | - Konrad Wagstyl
- Department of Imaging Neuroscience, UCL Queen Square Institute of Neurology, London, WC1N 3BG, UK
| | - Sophie Adler
- Developmental Neurosciences Research and Teaching Department, UCL Great Ormond Street Institute of Child Health, London, WC1N 1EH, UK
| | - Aswin Chari
- Developmental Neurosciences Research and Teaching Department, UCL Great Ormond Street Institute of Child Health, London, WC1N 1EH, UK
- Department of Neurosurgery, Great Ormond Street Hospital for Children, London, WC1N 3JH, UK
| | - John Booth
- Data Research, Innovation and Virtual Environments Unit, Great Ormond Street Hospital for Children, London, WC1N 3JH, UK
| | - Friederike Moeller
- Department of Neurophysiology, Great Ormond Street Hospital for Children, London, WC1N 3JH, UK
| | - Krishna Das
- Department of Neurology, Great Ormond Street Hospital for Children, London, WC1N 3JH, UK
- Department of Neurophysiology, Great Ormond Street Hospital for Children, London, WC1N 3JH, UK
| | - Christin Eltze
- Department of Neurophysiology, Great Ormond Street Hospital for Children, London, WC1N 3JH, UK
| | - Gerald Cooray
- Department of Neurophysiology, Great Ormond Street Hospital for Children, London, WC1N 3JH, UK
- Department of Clinical Neuroscience, Karolinska Institutet, Solna 171 77, Sweden
| | - Ana Perez Caballero
- North Thames Genomic Laboratory Hub, Great Ormond Street Hospital for Children, London, WC1N 3JH, UK
| | - Lara Menzies
- Department of Clinical Genetics, Great Ormond Street Hospital for Children, London, WC1N 3JH, UK
| | - Amy McTague
- Developmental Neurosciences Research and Teaching Department, UCL Great Ormond Street Institute of Child Health, London, WC1N 1EH, UK
- Department of Clinical Genetics, Great Ormond Street Hospital for Children, London, WC1N 3JH, UK
| | - Sara Shavel-Jessop
- Developmental Neurosciences Research and Teaching Department, UCL Great Ormond Street Institute of Child Health, London, WC1N 1EH, UK
- Department of Neuropsychology, Great Ormond Street Hospital for Children, London, WC1N 3JH, UK
| | - Martin M Tisdall
- Developmental Neurosciences Research and Teaching Department, UCL Great Ormond Street Institute of Child Health, London, WC1N 1EH, UK
- Department of Neurosurgery, Great Ormond Street Hospital for Children, London, WC1N 3JH, UK
| | - J Helen Cross
- Developmental Neurosciences Research and Teaching Department, UCL Great Ormond Street Institute of Child Health, London, WC1N 1EH, UK
- Department of Neurology, Great Ormond Street Hospital for Children, London, WC1N 3JH, UK
- Department of Neurosurgery, Great Ormond Street Hospital for Children, London, WC1N 3JH, UK
- Young Epilepsy, Lingfield, RH7 6PW, UK
| | - Patricia Martin Sanfilippo
- Developmental Neurosciences Research and Teaching Department, UCL Great Ormond Street Institute of Child Health, London, WC1N 1EH, UK
- Department of Neuropsychology, Great Ormond Street Hospital for Children, London, WC1N 3JH, UK
| | - Torsten Baldeweg
- Developmental Neurosciences Research and Teaching Department, UCL Great Ormond Street Institute of Child Health, London, WC1N 1EH, UK
- Department of Neuropsychology, Great Ormond Street Hospital for Children, London, WC1N 3JH, UK
- Department of Neurosurgery, Great Ormond Street Hospital for Children, London, WC1N 3JH, 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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Lu S, Chu M, Wang X, Wu Y, Hou Y, Liu A. Anterior temporal lobectomy improved mood status and quality of life in Chinese patients with mesial temporal lobe epilepsy: a single-arm cohort study. Chin Med J (Engl) 2023; 136:407-414. [PMID: 36867545 PMCID: PMC10106264 DOI: 10.1097/cm9.0000000000002094] [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: 07/06/2022] [Indexed: 03/04/2023] Open
Abstract
BACKGROUND Many studies have emphasized that selective resection of epileptic lesions in temoral lobe is associated with better preservation of cognition function; whether this applies to patients with refractory mesial temporal lobe epilepsy (MTLE) remains unknown. The objective of this study was to evaluate changes in cognitive functions, mood status, and quality of life after anterior temporal lobectomy in patients with refractory MTLE. METHODS This single-arm cohort study assessed cognitive function, mood status, and quality of life, as well as electroencephalography findings, in patients with refractory MTLE who underwent anterior temporal lobectomy at Xuanwu Hospital from January 2018 to March 2019. Pre- and post-operative characteristics were compared to evaluate the effects of surgery. RESULTS Anterior temporal lobectomy significantly reduced the frequencies of epileptiform discharges. The overall success rate of surgery was acceptable. Anterior temporal lobectomy did not result in significant changes in overall cognitive functions (P > 0.05), although changes in certain domains, including visuospatial ability, executive ability, and abstract thinking, were detected. Anterior temporal lobectomy resulted in improvements in anxiety and depression symptoms and quality of life. CONCLUSIONS Anterior temporal lobectomy reduced epileptiform discharges and incidence of post-operative seizures as well as resulted in improved mood status and quality of life without causing significant changes in cognitive function.
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Affiliation(s)
- Song Lu
- Department of Neurology, Xuanwu Hospital Capital Medical University, Beijing 100053, China
- Fuxing Hospital, Capital Medical University, Beijing 100069, China
| | - Min Chu
- Department of Neurology, Xuanwu Hospital Capital Medical University, Beijing 100053, China
| | - Xian Wang
- Department of Neurology, Xuanwu Hospital Capital Medical University, Beijing 100053, China
| | - Yating Wu
- Department of Neurology, Xuanwu Hospital Capital Medical University, Beijing 100053, China
| | - Yue Hou
- Department of Neurology, Xuanwu Hospital Capital Medical University, Beijing 100053, China
| | - Aihua Liu
- Department of Neurology, Xuanwu Hospital Capital Medical University, Beijing 100053, China
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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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Cross JH, Reilly C, Gutierrez Delicado E, Smith ML, Malmgren K. Epilepsy surgery for children and adolescents: evidence-based but underused. THE LANCET CHILD & ADOLESCENT HEALTH 2022; 6:484-494. [DOI: 10.1016/s2352-4642(22)00098-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 03/12/2022] [Accepted: 03/23/2022] [Indexed: 11/30/2022]
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Romanowski EF, McNamara N. Surgery for Intractable Epilepsy in Pediatrics, a Systematic Review of Outcomes other than Seizure Freedom. Semin Pediatr Neurol 2021; 39:100928. [PMID: 34620460 DOI: 10.1016/j.spen.2021.100928] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Revised: 08/23/2021] [Accepted: 08/27/2021] [Indexed: 11/25/2022]
Abstract
To perform a systematic review evaluating reported outcomes for epilepsy surgery in pediatric patients with pharmacoresistant epilepsy beyond seizure control, including impact on quality of life, behavioral, neurocognitive outcomes as well as complications, and death. We reviewed articles from both EMBASE and MEDLINE/PubMed articles that met formal criteria (patients ≤18 years, those with intractable epilepsy, at least 5 patients in the case series, published in peer-reviewed journal). Each reviewer independently reviewed the articles and those with discrepancies were discussed and consensus was reached. Out of a total of 536 abstracts obtained from EMBASE and MEDLINE/PubMed searches combined with additional cross-referencing, a total of 98 manuscripts ultimately met all inclusion criteria. The manuscripts were divided into 3 outcomes categories: Quality of Life (16), Cognitive Outcomes (60), and Deficits and Complications (50). Several papers fell into more than 1 category. These were separated by surgical types and evaluated. We found that overall reporting in all domains was variable and inconsistent amongst the different studies. This systematic review highlights the lack of completeness in reporting outcomes and complications involving pediatric epilepsy surgery and discordant results. This underscores the importance of multicenter systematic prospective data collection in pediatric patients who undergo pediatric epilepsy surgery.
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Affiliation(s)
| | - Nancy McNamara
- Division of Pediatric Neurology, University of Michigan, Ann Arbor, MI.
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Kahana Levy N, Segalovsky J, Benifla M, Elkana O. Quantitative Meta-Analyses: Lateralization of Memory Functions Before and After Surgery in Children with Temporal Lobe Epilepsy. Neuropsychol Rev 2021; 31:535-568. [PMID: 33675457 DOI: 10.1007/s11065-020-09470-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Accepted: 11/29/2020] [Indexed: 11/26/2022]
Abstract
RATIONALE Memory deficits in children with epilepsy have been reported in some but not all studies assessing the effects of side of seizures and resection from the temporal lobe on cognitive performance. This meta-analysis provides a quantitative systematic review of previous studies on this issue. METHOD A critical review and meta-analysis of the literature on memory performance in children with Temporal Lobe Epilepsy (TLE) was conducted. Search identified 25 studies, 13 of which compared children with TLE to healthy age-matched controls and 12 of which compared children with TLE before and after surgery. RESULTS Heterogeneity of the comparisons of children with TLE to healthy controls impeded drawing definitive conclusions. However, in 55% of the studies, verbal memory in children with left TLE (LTLE) was impaired as compared to healthy controls. Verbal memory performance slightly declines after pediatric LTLE surgery, but nonverbal memory tasks are not affected. By contrast, verbal memory performance is not affected by pediatric right TLE (RTLE) surgery. CONCLUSIONS The findings suggest that side of the epileptogenic zone and resection from the temporal lobe affect verbal memory in children with LTLE. Right resection seems to be safe with respect to verbal memory performance.
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Affiliation(s)
- Naomi Kahana Levy
- Comprehensive Epilepsy Center, Rambam Health Care Campus, Haifa, Israel
| | - Jonathan Segalovsky
- School of Behavioral Sciences, Academic College of Tel Aviv-Jaffa, P.O.B. 8401, 61083, Tel-Aviv-Jaffa, Israel
| | - Mony Benifla
- Comprehensive Epilepsy Center, Rambam Health Care Campus, Haifa, Israel
| | - Odelia Elkana
- School of Behavioral Sciences, Academic College of Tel Aviv-Jaffa, P.O.B. 8401, 61083, Tel-Aviv-Jaffa, Israel.
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Abstract
Since the seminal work on the patient HM, who in his adulthood presented an acquired amnesic syndrome following the resection of the bilateral temporal lobe, other research has described several cases of isolated memory dysfunction in children. This chapter presents developmental and long-lasting memory disorders emerging from an organic or neurologic cause at birth or in infancy. More notably, we focus on developmental amnesic syndrome caused by neonatal bihippocampal damage and memory dysfunction caused by medial temporal developmental epilepsy. We describe these two pediatric populations and present the consequences of hippocampal/medial temporal lobe damage in the development of memory systems. We review episodic memory deficits in children with developmental amnesia and temporal lobe epilepsy and highlight their impact on new learning, personal memories, and independent life. Finally, we provide a brief overview of some of the insights and debates emerging from classic work and recent advances in the context of episodic memory dysfunction displayed by children with hippocampal/medial temporal lobe amnesia and propose new perspectives in child neuropsychology of memory, suggesting new avenues for more ecologic memory assessment and rehabilitation.
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Sakpichaisakul K, Byars AW, Horn PS, Aungaroon G, Greiner HM, Mangano FT, Holland KD, Arya R. Neuropsychological outcomes after pediatric epilepsy surgery: Role of electrical stimulation language mapping. Seizure 2020; 80:183-191. [PMID: 32604001 DOI: 10.1016/j.seizure.2020.06.029] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2020] [Revised: 06/22/2020] [Accepted: 06/24/2020] [Indexed: 01/06/2023] Open
Abstract
PURPOSE We studied the association between electrical stimulation mapping (ESM) with a visual naming task and post-operative neuropsychological outcomes after pediatric epilepsy surgery. METHODS Children who underwent epilepsy surgery, having pre- and 1-year post-surgery neuropsychological evaluation (NPE) available, were included. NPE scores were transformed using principal components (PC) analysis. The relationship between post-surgical PC scores, adjusted for pre-surgery PC scores, and ESM was analyzed. Clinical variables influencing this relationship were also sought. RESULTS One hundred and four children (89 patients >5 years-old, and 15 patients 3-5 years-old) were included. Among children >5 years-of-age, a significant effect of language ESM was observed on all 3 post-surgery PC scores adjusted for respective pre-surgery PC scores. Specifically, only 30 % patients who underwent language ESM had a decrease in PC1 scores ≥1-year after epilepsy surgery, compared to 68 % those who did not undergo language ESM (p = 0.001). Seizure outcomes, age at the time of surgery, predominant seizure type, and family history of epilepsy were other significant determinants of post-surgical PC scores including a change in PC scores from pre-surgery baseline. Combinations of pre-surgical variables were able to predict post-surgical PC scores with high specificity. In children aged 3-5 years, no significant effect of language ESM was seen on post-surgery PC scores adjusted for respective pre-surgery PC scores. CONCLUSIONS Speech/language ESM should be performed more widely in patients >5 years-of-age undergoing epilepsy surgery. Also, more efficient brain mapping techniques and language paradigms are needed for younger children.
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Affiliation(s)
- Kullasate Sakpichaisakul
- Comprehensive Epilepsy Center, Division of Neurology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA; Division of Neurology, Department of Pediatrics, Queen Sirikit National Institute of Child Health, College of Medicine, Rangsit University, Bangkok, Thailand
| | - Anna W Byars
- Comprehensive Epilepsy Center, Division of Neurology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA; Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Paul S Horn
- Comprehensive Epilepsy Center, Division of Neurology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA; Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Gewalin Aungaroon
- Comprehensive Epilepsy Center, Division of Neurology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA; Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Hansel M Greiner
- Comprehensive Epilepsy Center, Division of Neurology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA; Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Francesco T Mangano
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA; Division of Pediatric Neurosurgery, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Katherine D Holland
- Comprehensive Epilepsy Center, Division of Neurology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA; Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Ravindra Arya
- Comprehensive Epilepsy Center, Division of Neurology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA; Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA.
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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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Hoppe C, Porębska I, Beeres K, Sassen R, Kuczaty S, Gleissner U, Lendt M, Elger CE, Helmstaedter C. Parents' view of the cognitive outcome one year after pediatric epilepsy surgery. Epilepsy Behav 2019; 101:106552. [PMID: 31698257 DOI: 10.1016/j.yebeh.2019.106552] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 09/06/2019] [Accepted: 09/08/2019] [Indexed: 11/25/2022]
Abstract
OBJECTIVES The cognitive outcome of pediatric epilepsy surgery has mainly been examined on the basis of standardized tests. Here, we analyzed the outcome in six cognitive domains from the parents' view. METHODS Included were consecutive surgical pediatric patients whose parents filled-in a comprehensive questionnaire on cognitive problems in children and adolescents (Kognitive Probleme bei Kindern und Jugendlichen (KOPKIJ); Gleissner et al. 2006) at the preoperative baseline (T1) as well as twelve months thereafter (T2). All children also underwent standard neuropsychological assessments at T1 and T2. RESULTS Parents of 96 patients provided pre- and postoperative KOPKIJ data. Overall, 80% of the children became seizure-free at the follow-up. Group means indicated a strong positive effect of time on KOPKIJ and neuropsychological performance. We found postoperative improvements in five out of six cognitive domains (language, memory, executive functions, attention, school; unchanged: visuospatial abilities). Individually, improvements were twice as likely as declines. However, 33 patients (35%) experienced significant decline in at least one cognitive domain. Later onset of epilepsy resulted in better performance but had no effect on change scores. Seizure-free status, lower antiseizure drug load, and stronger drug reduction after surgery contributed to postoperative cognitive improvements as perceived by the parents; no other effects of clinical factors were obtained (e.g., localization/lateralization). Despite their similar outcome patterns, change scores as derived from parental ratings and neuropsychological assessment were not correlated. CONCLUSIONS Parents acknowledged the overall positive neurocognitive development after pediatric epilepsy surgery as previously shown by standardized tests. Seizure freedom and lower antiseizure drug load contributed to the beneficial cognitive outcome. Even if cognitive improvements outweighed declines, a risk for cognitive decline with impact on everyday functioning does exist.
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Affiliation(s)
- Christian Hoppe
- Department of Epileptology, University of Bonn Medical Centre, Venusberg-Campus 1, FRG-53127 Bonn, Germany.
| | - Izabela Porębska
- Department of Epileptology, University of Bonn Medical Centre, Venusberg-Campus 1, FRG-53127 Bonn, Germany
| | - Kassandra Beeres
- Department of Epileptology, University of Bonn Medical Centre, Venusberg-Campus 1, FRG-53127 Bonn, Germany
| | - Robert Sassen
- Department of Epileptology, University of Bonn Medical Centre, Venusberg-Campus 1, FRG-53127 Bonn, Germany
| | - Stefan Kuczaty
- Department of Epileptology, University of Bonn Medical Centre, Venusberg-Campus 1, FRG-53127 Bonn, Germany
| | - Ulrike Gleissner
- LVR-Klinik Bonn, Kinderneurologisches Zentrum, Waldenburger Ring 46, FRG-53119 Bonn, Germany
| | - Michael Lendt
- St. Mauritius Therapieklinik, Strümper Str. 111, FRG-40670 Meerbusch, Germany
| | - Christian E Elger
- Department of Epileptology, University of Bonn Medical Centre, Venusberg-Campus 1, FRG-53127 Bonn, Germany
| | - Christoph Helmstaedter
- Department of Epileptology, University of Bonn Medical Centre, Venusberg-Campus 1, FRG-53127 Bonn, Germany; St. Mauritius Therapieklinik, Strümper Str. 111, FRG-40670 Meerbusch, Germany
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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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Hamberger MJ, MacAllister WS, Seidel WT, Busch RM, Salinas CM, Klaas P, Smith ML. Noninvasive identification of seizure lateralization in children: Name that thing. Neurology 2019; 92:e1-e8. [PMID: 30518557 PMCID: PMC6336167 DOI: 10.1212/wnl.0000000000006691] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Accepted: 08/16/2018] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE With this prospective, observational study, we aimed to determine whether noninvasive language tasks, developed specifically for children, could reliably identify the hemisphere of seizure onset in pediatric epilepsy. METHODS Seventy-eight children with unilateral epilepsy (44 left), aged 6-15 years (mean age = 11.8, SD = 2.6), completed the Children's Auditory Naming and Visual Naming Tests, the Boston Naming Test, and other verbal and nonverbal tasks. Multivariate analysis of variance was used to compare test performance between left and right hemisphere epilepsy groups, and χ2 analyses and odds ratios were used to examine classification of left vs right hemisphere epilepsy for individual patients based on test performance. RESULTS Group comparisons revealed poorer auditory naming in children with left hemisphere epilepsy (p = 0.02), yet no significant differences on measures of visual naming, general intelligence, or other cognitive functions. Moreover, χ2 analyses using auditory naming cutoff scores to define intact vs impaired performance correctly classified seizure laterality in a significant proportion of children (p = 0.004). The odds of left hemisphere epilepsy were 4.2 times higher (95% confidence interval 1.4-11.7) than the odds of right hemisphere epilepsy with poor auditory naming performance. In the subset of patients with temporal lobe epilepsy (TLE), the odds of left TLE were 11.3 times higher (95% confidence interval 2.00-63.17) than the odds of right TLE with poor auditory naming performance. CONCLUSION Contrary to previous findings, naming performance can lateralize hemisphere of seizure onset in children with epilepsy, thereby assisting in the preoperative workup for pediatric epilepsy surgery.
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Affiliation(s)
- Marla J Hamberger
- From the Department of Neurology (M.J.H.), Columbia University, New York; New York University (W.S.M.), NY; Tris Pharma, Inc. (W.T.S.), Monmouth Junction, NJ; Epilepsy Center (R.M.B.), and Department of Psychiatry and Psychology (P.K.), Cleveland Clinic, OH; Department of Psychology (C.M.S.), University of Florida Hospital for Children, Orlando; and Department of Psychology (M.L.S.), University of Toronto, Mississauga, Canada. W.S.M. is currently at Alberta Children's Hospital Research Institute, Canada. C.M.S. is currently at Space Coast Neuropsychology Center, Melbourne, FL.
| | - William S MacAllister
- From the Department of Neurology (M.J.H.), Columbia University, New York; New York University (W.S.M.), NY; Tris Pharma, Inc. (W.T.S.), Monmouth Junction, NJ; Epilepsy Center (R.M.B.), and Department of Psychiatry and Psychology (P.K.), Cleveland Clinic, OH; Department of Psychology (C.M.S.), University of Florida Hospital for Children, Orlando; and Department of Psychology (M.L.S.), University of Toronto, Mississauga, Canada. W.S.M. is currently at Alberta Children's Hospital Research Institute, Canada. C.M.S. is currently at Space Coast Neuropsychology Center, Melbourne, FL
| | - William T Seidel
- From the Department of Neurology (M.J.H.), Columbia University, New York; New York University (W.S.M.), NY; Tris Pharma, Inc. (W.T.S.), Monmouth Junction, NJ; Epilepsy Center (R.M.B.), and Department of Psychiatry and Psychology (P.K.), Cleveland Clinic, OH; Department of Psychology (C.M.S.), University of Florida Hospital for Children, Orlando; and Department of Psychology (M.L.S.), University of Toronto, Mississauga, Canada. W.S.M. is currently at Alberta Children's Hospital Research Institute, Canada. C.M.S. is currently at Space Coast Neuropsychology Center, Melbourne, FL
| | - Robyn M Busch
- From the Department of Neurology (M.J.H.), Columbia University, New York; New York University (W.S.M.), NY; Tris Pharma, Inc. (W.T.S.), Monmouth Junction, NJ; Epilepsy Center (R.M.B.), and Department of Psychiatry and Psychology (P.K.), Cleveland Clinic, OH; Department of Psychology (C.M.S.), University of Florida Hospital for Children, Orlando; and Department of Psychology (M.L.S.), University of Toronto, Mississauga, Canada. W.S.M. is currently at Alberta Children's Hospital Research Institute, Canada. C.M.S. is currently at Space Coast Neuropsychology Center, Melbourne, FL
| | - Christine M Salinas
- From the Department of Neurology (M.J.H.), Columbia University, New York; New York University (W.S.M.), NY; Tris Pharma, Inc. (W.T.S.), Monmouth Junction, NJ; Epilepsy Center (R.M.B.), and Department of Psychiatry and Psychology (P.K.), Cleveland Clinic, OH; Department of Psychology (C.M.S.), University of Florida Hospital for Children, Orlando; and Department of Psychology (M.L.S.), University of Toronto, Mississauga, Canada. W.S.M. is currently at Alberta Children's Hospital Research Institute, Canada. C.M.S. is currently at Space Coast Neuropsychology Center, Melbourne, FL
| | - Patricia Klaas
- From the Department of Neurology (M.J.H.), Columbia University, New York; New York University (W.S.M.), NY; Tris Pharma, Inc. (W.T.S.), Monmouth Junction, NJ; Epilepsy Center (R.M.B.), and Department of Psychiatry and Psychology (P.K.), Cleveland Clinic, OH; Department of Psychology (C.M.S.), University of Florida Hospital for Children, Orlando; and Department of Psychology (M.L.S.), University of Toronto, Mississauga, Canada. W.S.M. is currently at Alberta Children's Hospital Research Institute, Canada. C.M.S. is currently at Space Coast Neuropsychology Center, Melbourne, FL
| | - Mary Lou Smith
- From the Department of Neurology (M.J.H.), Columbia University, New York; New York University (W.S.M.), NY; Tris Pharma, Inc. (W.T.S.), Monmouth Junction, NJ; Epilepsy Center (R.M.B.), and Department of Psychiatry and Psychology (P.K.), Cleveland Clinic, OH; Department of Psychology (C.M.S.), University of Florida Hospital for Children, Orlando; and Department of Psychology (M.L.S.), University of Toronto, Mississauga, Canada. W.S.M. is currently at Alberta Children's Hospital Research Institute, Canada. C.M.S. is currently at Space Coast Neuropsychology Center, Melbourne, FL
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Evidence for degraded low frequency verbal concepts in left resected temporal lobe epilepsy patients. Neuropsychologia 2018; 114:88-100. [DOI: 10.1016/j.neuropsychologia.2018.04.020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Revised: 04/19/2018] [Accepted: 04/20/2018] [Indexed: 11/15/2022]
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Neuropsychological outcomes following paediatric temporal lobe surgery for epilepsies: Evidence from a systematic review. Seizure 2017; 52:89-116. [PMID: 29032016 DOI: 10.1016/j.seizure.2017.09.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Revised: 08/24/2017] [Accepted: 09/06/2017] [Indexed: 01/01/2023] Open
Abstract
OBJECTIVE The systematic review aimed to assess the neuropsychological outcomes of temporal lobe resections for epilepsy in children. Additional objectives included determining whether earlier age at surgery leads to better neuropsychological outcomes; the relationships between and predictors of these outcomes. METHODS Using advanced search terms, a systematic review of electronic databases was conducted, comprising MEDLINE, Embase, PsycINFO, Global Health, Web of Science and CINAHL. Included studies reported on outcome following neurosurgical treatment for epilepsy. Specifically, studies were included if they reported neuropsychological outcomes and were concerned only with temporal lobe resection. RESULTS 73 studies met inclusion criteria. For reported neuropsychological outcomes, the majority of participants remained stable after surgery; some declined and some improved. There was some evidence for increased material-specific memory deficits after temporal lobe surgery based on resection side, and more positive cognitive outcome for those with lower pre-surgical ability level. SIGNIFICANCE Retrieved evidence highlights the need for improvements to quality of methodology and reporting. Appropriately designed prospective multicentre trials should be conducted with adequate follow-up for long-term outcomes to be measured. Core outcome measures should be agreed between centres. This would permit higher quality evidence so that clinicians, young people and their families may make better informed decisions about whether or not to proceed with surgery and likely post-operative profile.
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Sibilia V, Barba C, Metitieri T, Michelini G, Giordano F, Genitori L, Guerrini R. Cognitive outcome after epilepsy surgery in children: A controlled longitudinal study. Epilepsy Behav 2017; 73:23-30. [PMID: 28605630 DOI: 10.1016/j.yebeh.2017.03.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Revised: 03/03/2017] [Accepted: 03/04/2017] [Indexed: 11/30/2022]
Abstract
OBJECTIVE To analyze the determinants of cognitive outcome two years after surgery for drug-resistant epilepsy in a cohort of 31 children when compared to a control group of 14 surgical candidates who had yet to undergo surgery two years after the first neuropsychological assessment. METHODS Controlled longitudinal study including three evaluations of IQ (Intelligence Quotient) scores or GDQ (General Developmental Quotient) for each group depending on the patient's age: prior to surgery (T0), one year (T1) and two years (T2) after surgery for the surgical group; baseline (T0) and one year (T1) and 2years (T2) after the first evaluation for the control-group. At follow-up, 25 children (80%) of the surgical group were seizure free, while seizure outcome was unsatisfactory in the remaining six (20%). To analyze language, visuomotor skills, memory, reading, visual attention, and behavior, we selected 11 school age children in the surgical group and nine controls. We reported performance prior to (T0) and one year after surgery (T1). RESULTS There was a significant correlation between earlier age at seizure onset and lower IQ/GDQ at T0 (r=0.39; p=0.03) in the overall cohort. IQ/GDQ scores did not significantly differ between the surgical and control groups when analyzed at T0 and T2. However, they evolved differently with an improved developmental trajectory becoming identifiable only in the surgical group (F1,31=5.33 p=0.028; η2=0.15). There was also a significant increase of forward digit span (Z=2.33; p=0.02) and Rey recall scores (Z=1.97; p=0.049) in the surgical school age subgroup at T1 versus T0. SIGNIFICANCE We identified significantly different developmental trajectories in operated versus non- operated children with improved IQ/GDQ scores in operated children only. We also observed a significant increase of digit span scores and Rey recall scores a year after surgery. Further studies including larger samples with longer follow-ups are needed to confirm these preliminary findings.
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Affiliation(s)
- Valentina Sibilia
- Pediatric Neurology Unit and Laboratories, Children's Hospital A. Meyer-University of Florence, Viale Pieraccini 24, 50139 Florence, Italy
| | - Carmen Barba
- Pediatric Neurology Unit and Laboratories, Children's Hospital A. Meyer-University of Florence, Viale Pieraccini 24, 50139 Florence, Italy
| | - Tiziana Metitieri
- Pediatric Neurology Unit and Laboratories, Children's Hospital A. Meyer-University of Florence, Viale Pieraccini 24, 50139 Florence, Italy
| | - Giovanni Michelini
- Department of Neuroscience -University of Parma, Via Volturno 39, 43125, Parma, Italy
| | - Flavio Giordano
- Pediatric Neurosurgery Unit, Children's Hospital A. Meyer-University of Florence, Viale Pieraccini 24, 50139 Florence, Italy
| | - Lorenzo Genitori
- Pediatric Neurosurgery Unit, Children's Hospital A. Meyer-University of Florence, Viale Pieraccini 24, 50139 Florence, Italy
| | - Renzo Guerrini
- Pediatric Neurology Unit and Laboratories, Children's Hospital A. Meyer-University of Florence, Viale Pieraccini 24, 50139 Florence, Italy; IRCCS Stella Maris, Viale del Tirreno 331, 56128 Calambrone Pisa, Italy.
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Ravindra VM, Sweney MT, Bollo RJ. Recent developments in the surgical management of paediatric epilepsy. Arch Dis Child 2017; 102:760-766. [PMID: 28096104 DOI: 10.1136/archdischild-2016-311183] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Revised: 12/12/2016] [Accepted: 12/21/2016] [Indexed: 11/08/2022]
Abstract
Among the 1% of children affected by epilepsy, failure of pharmacological therapy and early age of seizure onset can lead to worse long-term cognitive outcomes, mental health disorders and impaired functional status. Surgical management often improves functional and cognitive outcomes in children with medically refractory epilepsy, especially when seizure remission is achieved. However, surgery remains underused in children with drug-resistant epilepsy, creating a large treatment gap. Several recent innovations have led to considerable improvement in surgical technique, including the recent development of minimally invasive diagnostic and therapeutic techniques such as stereotactic EEG, transcranial magnetic stimulation, MRI-guided laser ablation, as well as novel paradigms of neurostimulation. This article discusses the current landscape of surgical innovation in the management of paediatric epilepsy, leading to a paradigm shift towards minimally invasive therapy and closing the treatment gap in children suffering from drug-resistant seizures.
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Affiliation(s)
- Vijay M Ravindra
- Division of Pediatric Neurosurgery, Department of Neurosurgery, University of Utah School of Medicine, Primary Children's Hospital, Slat Lake City, Utah, USA
| | - Matthew T Sweney
- Division of Pediatric Neurology, Department of Pediatrics, University of Utah School of Medicine, Primary Children's Hospital, Salt Lake City, Utah, USA
| | - Robert J Bollo
- Division of Pediatric Neurosurgery, Department of Neurosurgery, University of Utah School of Medicine, Primary Children's Hospital, Slat Lake City, Utah, USA
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Lah S, Castles A, Smith ML. Reading in children with temporal lobe epilepsy: A systematic review. Epilepsy Behav 2017; 68:84-94. [PMID: 28131931 DOI: 10.1016/j.yebeh.2016.12.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2016] [Revised: 12/15/2016] [Accepted: 12/17/2016] [Indexed: 10/20/2022]
Abstract
OBJECTIVE Children with epilepsy have higher rates of reading difficulties compared to the general population. Reading difficulties are associated with lower academic attainments, higher school drop-out rates, greater risk of unemployment, lower income, and poorer adjustment. We examined the literature dealing with reading in children with the most common type of focal epilepsy, temporal lobe epilepsy (TLE), in relation to: presence of reading difficulties, contributing factors, and efficacy of treatments for reading difficulties. METHODS We searched databases (MEDLINE, EMBASE, PsycINFO and PubMed) for studies published before September 2016. Included studies (i) reported on a group of children with TLE, (ii) used a standardized reading test or included a control group, (iii) involved original research published in peer reviewed journals in the English language. RESULTS Of 2018 citations obtained through literature searches, six met inclusion criteria. Reading accuracy and/or reading comprehension were assessed using different tests. All but one study found statistical evidence of reading difficulties in children with TLE. Only two studies examined relations between cognitive deficits and reading. One found that memory contributed to reading accuracy and comprehension. Another found evidence of a small decline in reading accuracy, which was not associated with a decline in memory post-surgery. Several studies were underpowered, giving false negative findings and not allowing relations between epilepsy factors, underlying cognitive deficits, and reading to be adequately examined. No study examined efficacy of reading intervention in this patient population. SIGNIFICANCE We showed that reading difficulties that are present in children with TLE are under researched, yet they have significant functional consequences through childhood and into adulthood. There is an urgent need to identify risk factors and investigate efficacy of treatments for reading difficulties in children with TLE, as this will enable early identification and evidence-based treatment to be delivered in clinical practice.
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Affiliation(s)
- Suncica Lah
- Department of Psychology, University of Sydney, Sydney, NSW, Australia; ARC Centre of Excellence in Cognition and Its Disorders, Australia.
| | - Anne Castles
- ARC Centre of Excellence in Cognition and Its Disorders, Australia
| | - Mary Lou Smith
- ARC Centre of Excellence in Cognition and Its Disorders, Australia; Department of Psychology, University of Toronto Mississauga, Mississauga, ON, Canada; Neuroscience and Mental Health Program, Hospital for Sick Children, Toronto, ON, Canada
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Law N, Benifla M, Rutka J, Smith ML. Verbal memory after temporal lobe epilepsy surgery in children: Do only mesial structures matter? Epilepsia 2016; 58:291-299. [PMID: 28012164 DOI: 10.1111/epi.13635] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/08/2016] [Indexed: 12/11/2022]
Abstract
OBJECTIVE Previous findings have been mixed regarding verbal memory outcome after left temporal lobectomy in children, and there are few studies comparing verbal memory change after lateral versus mesial temporal lobe resections. We compared verbal memory outcome associated with sparing or including the mesial structures in children who underwent left or right temporal lobe resection. We also investigated predictors of postsurgical verbal memory change. METHODS We retrospectively assessed verbal memory change approximately 1 year after unilateral temporal lobe epilepsy surgery using a list learning task. Participants included 23 children who underwent temporal lobe surgery with sparing of the mesial structures (13 left), and 40 children who had a temporal lobectomy that included resection of mesial structures (22 left). RESULTS Children who underwent resection from the left lateral and mesial temporal lobe were the only group to show decline in verbal memory. Furthermore, when we considered language representation in the left temporal resection group, patients with left language representation and spared mesial structures showed essentially no change in verbal memory from preoperative to follow-up, whereas those with left language representation and excised mesial structures showed a decline. Postoperative seizure status had no effect on verbal memory change in children after left temporal lobe surgery. Finally, we found that patients with intact preoperative verbal memory experienced a significant decline compared to those with below average preoperative verbal memory. SIGNIFICANCE Our findings provide evidence of significant risk factors for verbal memory decline in children, specific to left mesial temporal lobe epilepsy. Children who undergo left temporal lobe surgery that includes mesial structures may be most vulnerable for verbal memory decline, especially when language representation is localized to the left hemisphere and when preoperative verbal memory is intact.
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Affiliation(s)
- Nicole Law
- Department of Psychology, University of Toronto, Toronto, Ontario, Canada.,Department of Psychology, Hospital for Sick Children, Toronto, Ontario, Canada.,Program in Neurosciences and Mental Health, Hospital for Sick Children, Toronto, Ontario, Canada
| | - Mony Benifla
- Department of Neurosurgery, Hadassah Medical Center, Jerusalem, Israel
| | - James Rutka
- Division of Neurosurgery, Department of Surgery, University of Toronto, Toronto, Ontario, Canada
| | - Mary Lou Smith
- Department of Psychology, University of Toronto, Toronto, Ontario, Canada.,Department of Psychology, Hospital for Sick Children, Toronto, Ontario, Canada.,Program in Neurosciences and Mental Health, Hospital for Sick Children, Toronto, Ontario, Canada
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Puka K, Smith ML. Predictors of language skills in the long term after pediatric epilepsy surgery. Epilepsy Behav 2016; 63:1-8. [PMID: 27538014 DOI: 10.1016/j.yebeh.2016.07.031] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Revised: 07/18/2016] [Accepted: 07/24/2016] [Indexed: 10/21/2022]
Abstract
OBJECTIVE The objective of this study was to evaluate language skills in a heterogeneous cohort of patients who underwent or were considered for epilepsy surgery in childhood 4-11years earlier. The few existing studies that have evaluated cognitive function in the long term after surgery have examined intelligence and memory. METHOD Participants were 97 patients, of whom 61 underwent surgery. They completed standardized tests of picture naming, vocabulary, letter fluency, semantic fluency and intelligence at baseline and, on average, 7years later. RESULTS Among all patient groups, scores across language tasks were similar at baseline and follow-up. Language skills were largely independent of surgical status but were associated with seizure control. Seizure freedom and/or a longer proportion of life without seizures were associated with higher scores across all language tasks at follow-up. However, few patients showed meaningful improvements or deterioration at the individual level. Older age at epilepsy onset, higher IQ, and higher baseline scores were associated with higher follow-up scores on all language tasks. Localization and lateralization of epileptogenic foci and language lateralization were associated with higher scores on some language tasks at follow-up. Most of these variables were also predictive of change in scores over time on some of the language tasks. SIGNIFICANCE Language skills largely remained similar at baseline and follow-up. Seizure freedom was associated with a modest advantage at the group level, and no significant change at the individual level, suggesting an abnormal neural substrate or epileptic activity prior to seizure control may hinder the long-term capacity for improvement, even in the absence of seizure activity.
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Affiliation(s)
- Klajdi Puka
- Department of Psychology, The Hospital for Sick Children, Toronto, Canada
| | - Mary Lou Smith
- Department of Psychology, The Hospital for Sick Children, Toronto, 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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Puka K, Smith ML. Academic skills in the long term after epilepsy surgery in childhood. Epilepsy Behav 2016; 62:97-103. [PMID: 27450313 DOI: 10.1016/j.yebeh.2016.06.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Revised: 06/03/2016] [Accepted: 06/04/2016] [Indexed: 11/30/2022]
Abstract
OBJECTIVE We evaluated the progression of academic skills in a cohort of patients who underwent, or were considered for, epilepsy surgery in childhood, four to eleven years before. The few existing studies that have evaluated cognitive function in the long term after surgery have examined intelligence and memory. METHOD Participants were 97 patients with childhood-onset intractable epilepsy; 61 had undergone resective epilepsy surgery. Participants completed standardized tests of reading, spelling, arithmetic, and intelligence at baseline and, on average, 7years after. Surgical patients were additionally assessed one year postsurgery. RESULTS At baseline and long-term follow-up, 61% and 69% of patients, respectively, scored at least one standard deviation below normative data in at least one academic domain. Evaluation of change over time while controlling for IQ showed that arithmetic scores were lower at long-term follow-up in comparison with those at baseline among all patient groups, whereas reading and spelling scores remained unchanged. Few advantages were associated with seizure control. Multiple regression analyses found that older age at surgery, cessation of antiepileptic medications, improved IQ, and low baseline scores were independently associated with improvement in some academic domains among all patient groups. CONCLUSION We found that arithmetic scores were lower at long-term follow-up, suggesting a lack of ongoing development or deterioration in skills. Reading and spelling scores remained stable suggesting that patients made gains in abilities at a rate expected for their increase in age; this finding contrasts with recent short-term outcome studies identifying significantly lower scores over time in these areas.
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Affiliation(s)
- Klajdi Puka
- Department of Psychology, The Hospital for Sick Children, Toronto, Canada
| | - Mary Lou Smith
- Department of Psychology, The Hospital for Sick Children, Toronto, 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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Abstract
In the approximately 1% of children affected by epilepsy, pharmacoresistance and early age of seizure onset are strongly correlated with poor cognitive outcomes, depression, anxiety, developmental delay, and impaired activities of daily living. These children often require multiple surgical procedures, including invasive diagnostic procedures with intracranial electrodes to identify the seizure-onset zone. The recent development of minimally invasive surgical techniques, including stereotactic electroencephalography (SEEG) and MRI-guided laser interstitial thermal therapy (MRgLITT), and new applications of neurostimulation, such as responsive neurostimulation (RNS), are quickly changing the landscape of the surgical management of pediatric epilepsy. In this review, the authors discuss these various technologies, their current applications, and limitations in the treatment of pediatric drug-resistant epilepsy, as well as areas for future research. The development of minimally invasive diagnostic and ablative surgical techniques together with new paradigms in neurostimulation hold vast potential to improve the efficacy and reduce the morbidity of the surgical management of children with drug-resistant epilepsy.
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Affiliation(s)
- Michael Karsy
- 1 Department of Neurosurgery, Clinical Neurosciences Center, University of Utah, Salt Lake City, USA ; 2 Division of Neurosurgery, University of Vermont, Burlington, USA ; 3 Division of Pediatric Neurosurgery, Primary Children's Hospital, Salt Lake City, USA
| | - Jian Guan
- 1 Department of Neurosurgery, Clinical Neurosciences Center, University of Utah, Salt Lake City, USA ; 2 Division of Neurosurgery, University of Vermont, Burlington, USA ; 3 Division of Pediatric Neurosurgery, Primary Children's Hospital, Salt Lake City, USA
| | - Katrina Ducis
- 1 Department of Neurosurgery, Clinical Neurosciences Center, University of Utah, Salt Lake City, USA ; 2 Division of Neurosurgery, University of Vermont, Burlington, USA ; 3 Division of Pediatric Neurosurgery, Primary Children's Hospital, Salt Lake City, USA
| | - Robert J Bollo
- 1 Department of Neurosurgery, Clinical Neurosciences Center, University of Utah, Salt Lake City, USA ; 2 Division of Neurosurgery, University of Vermont, Burlington, USA ; 3 Division of Pediatric Neurosurgery, Primary Children's Hospital, Salt Lake City, USA
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Puka K, Khattab M, Kerr EN, Smith ML. Academic achievement one year after resective epilepsy surgery in children. Epilepsy Behav 2015; 47:1-5. [PMID: 25988982 DOI: 10.1016/j.yebeh.2015.04.062] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Revised: 04/23/2015] [Accepted: 04/25/2015] [Indexed: 10/23/2022]
Abstract
PURPOSE Few studies have examined the academic functioning of children following pediatric epilepsy surgery. Although intellectual functioning has been more thoroughly investigated, children with epilepsy may experience additional difficulties with academic skills. This study examined the academic outcomes of a cohort of children who underwent pediatric epilepsy surgery on an average 1.2 (standard deviation [SD]: 0.3) years prior. METHODS Participants were 136 children (mean age: 14.3 years, [SD]: 3.7 years) who had undergone resective epilepsy surgery. Academic functioning was assessed presurgery and postsurgery using standardized tests of reading, reading comprehension, arithmetic, and spelling. RESULTS At baseline, 65% of the children displayed low achievement (1 SD below test mean), and 28% had underachievement (1 SD below baseline IQ) in at least one academic domain. Examining change over time revealed that reading, numeral operations, and spelling significantly declined among all patients; seizure freedom at follow-up (attained in 64% of the patients) did not influence this relationship. Reading comprehension and IQ remained unchanged. Similar findings were found when examining patients with a baseline IQ of ≥ 70 and when controlling for IQ. Regression analyses revealed that after controlling for IQ, demographic and seizure-related variables were not significantly associated with academic achievement at follow-up. CONCLUSIONS Results show baseline academic difficulties and deteriorations following surgery that go beyond IQ. Further investigations are required to determine whether the observed deteriorations result from the development of the child, the course of the disorder, or the epilepsy surgery itself. Long-term studies are warranted to identify the progression of academic achievement and whether the observed deteriorations represent a temporal disruption in function.
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Affiliation(s)
- Klajdi Puka
- Department of Psychology, The Hospital for Sick Children, 555 University Ave, Toronto, ON M5G 1X8, Canada
| | - Maryam Khattab
- Department of Psychology, University of Toronto Mississauga, 3359 Mississauga Rd, Mississauga, ON L5L 1C6, Canada
| | - Elizabeth N Kerr
- 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, 3359 Mississauga Rd, Mississauga, ON L5L 1C6, Canada; Neurosciences and Mental Health Program, The Hospital for Sick Children, 555 University Ave, Toronto, ON M5G 1X8, Canada.
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