1
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Tsai CH, Chen TS, Lai MC, Huang CW. Unilateral non-lesional temporal lobe epilepsy presenting as isolated ictal vertigo: a case report. J Int Med Res 2023; 51:3000605231187801. [PMID: 37548224 PMCID: PMC10408343 DOI: 10.1177/03000605231187801] [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: 02/07/2023] [Accepted: 06/26/2023] [Indexed: 08/08/2023] Open
Abstract
Temporal lobe epilepsy is the most common focal epilepsy syndrome and has a broad spectrum of presentations. Nevertheless, isolated vestibular symptoms without other symptoms typical of temporal lobe seizures are relatively rare. Here, we report one female patient who suffered from chronic refractory vertigo and had inappropriate pharmacotherapy for several years. Eventually, epileptic vertigo and dizziness (ictal vertigo) were accurately diagnosed by detailed history taking and serial examinations assisted by sphenoid electroencephalography. Awareness of this unique syndrome is important in the diagnosis of patients with epileptic vertigo and dizziness.
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Affiliation(s)
- Chih-Hung Tsai
- Department of Neurology, National Taiwan University Hospital Yunlin Branch, Yunlin, Taiwan
| | - Tsang-Shan Chen
- Department of Neurology, Tainan Sin-Lau Hospital, Tainan, Taiwan
| | - Ming-Chi Lai
- Department of Pediatrics, Chi-Mei Medical Center, Tainan, Taiwan
| | - Chin-Wei Huang
- Department of Neurology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
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2
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Ierusalimsky NV, Karimova ED, Samotaeva IS, Luzin RV, Zinchuk MS, Rider FK, Guekht AB. [Structural brain changes in patients with temporal lobe epilepsy and comorbid depression]. Zh Nevrol Psikhiatr Im S S Korsakova 2023; 123:83-89. [PMID: 37796072 DOI: 10.17116/jnevro202312309183] [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] [Indexed: 10/06/2023]
Abstract
OBJECTIVE To assess the morphological features of the brain structures in patients with temporal lobe epilepsy and comorbid depression. MATERIAL AND METHODS From 1 January 2017 to 31 December 2020, we studied 80 patients with temporal lobe epilepsy (aged 18-60 years, 38 of whom had comorbid depression) and 48 healthy subjects of comparable age. Magnetic resonance imaging (MRI) of the brain was performed using the epilepsy protocol in a scanner with a magnetic field strength of 1.5 T. Focal temporal lobe epilepsy was diagnosed by neurologists (epileptologists) specialising in epilepsy according to the International League Against Epilepsy (ILAE) classification of epilepsy. Psychiatrists assessed the presence and severity of depressive disorders by clinical interview and by participants' scores on the Beck Depression Inventory (BDI-II). MRI data were processed using FreeSurfer 6.0 software to determine volumes of subcortical structures and thicknesses of cortical structures. At the group level, analysis of covariance with Holm-Bonferroni correction was used as the statistical method. RESULTS Morphometric analysis revealed a significant decrease in the volume of the thalamus bilaterally and the brain stem and an increase in the volume of the choroid plexus in the left hemisphere, as well as a significant decrease in the thickness of the entorhinal cortex, temporal pole and isthmus of the cingulate gyrus in the left hemisphere and middle temporal gyrus and inferior temporal gyrus in the right hemisphere in patients with epilepsy compared to healthy controls. No association was found between the presence of depression and significant structural changes on MRI. CONCLUSION The data obtained suggest an effect of temporal lobe epilepsy, but not comorbid depression, on the morphology of brain structures.
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Affiliation(s)
- N V Ierusalimsky
- Institute of Higher Nervous Activity and Neurophysiology, Moscow, Russia
- Scientific and Practical Psychoneurological Center, Moscow, Russia
| | - E D Karimova
- Institute of Higher Nervous Activity and Neurophysiology, Moscow, Russia
- Scientific and Practical Psychoneurological Center, Moscow, Russia
| | - I S Samotaeva
- Institute of Higher Nervous Activity and Neurophysiology, Moscow, Russia
- Scientific and Practical Psychoneurological Center, Moscow, Russia
| | - R V Luzin
- Scientific and Practical Psychoneurological Center, Moscow, Russia
| | - M S Zinchuk
- Scientific and Practical Psychoneurological Center, Moscow, Russia
| | - F K Rider
- Scientific and Practical Psychoneurological Center, Moscow, Russia
| | - A B Guekht
- Scientific and Practical Psychoneurological Center, Moscow, Russia
- Pirogov Russian National Research Medical University, Moscow, Russia
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3
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Sarbisheh I, Tapak L, Fallahi A, Fardmal J, Sadeghifar M, Nazemzadeh M, Mehvari Habibabadi J. Cortical thickness analysis in temporal lobe epilepsy using fully Bayesian spectral method in magnetic resonance imaging. BMC Med Imaging 2022; 22:222. [PMID: 36544100 PMCID: PMC9768883 DOI: 10.1186/s12880-022-00949-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Accepted: 12/14/2022] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Temporal lobe epilepsy (TLE) is the most common type of epilepsy associated with changes in the cerebral cortex throughout the brain. Magnetic resonance imaging (MRI) is widely used for detecting such anomalies; nevertheless, it produces spatially correlated data that cannot be considered by the usual statistical models. This study aimed to compare cortical thicknesses between patients with TLE and healthy controls by considering the spatial dependencies across different regions of the cerebral cortex in MRI. METHODS In this study, T1-weighted MRI was performed on 20 healthy controls and 33 TLE patients. Nineteen patients had a left TLE and 14 had a right TLE. Cortical thickness was measured for all individuals in 68 regions of the cerebral cortex based on images. Fully Bayesian spectral method was utilized to compare the cortical thickness of different brain regions between groups. Neural networks model was used to classify the patients using the identified regions. RESULTS For the left TLE patients, cortical thinning was observed in bilateral caudal anterior cingulate, lateral orbitofrontal (ipsilateral), the bilateral rostral anterior cingulate, frontal pole and temporal pole (ipsilateral), caudal middle frontal and rostral middle frontal (contralateral side). For the right TLE patients, cortical thinning was only observed in the entorhinal area (ipsilateral). The AUCs of the neural networks for classification of left and right TLE patients versus healthy controls were 0.939 and 1.000, respectively. CONCLUSION Alteration of cortical gray matter thickness was evidenced as common effect of epileptogenicity, as manifested by the patients in this study using the fully Bayesian spectral method by taking into account the complex structure of the data.
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Affiliation(s)
- Iman Sarbisheh
- grid.411950.80000 0004 0611 9280Department of Biostatistics, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Leili Tapak
- grid.411950.80000 0004 0611 9280Department of Biostatistics, School of Public Health and Modeling of Noncommunicable Diseases Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Alireza Fallahi
- grid.411705.60000 0001 0166 0922Research Center for Molecular and Cellular Imaging, Advanced Medical Technologies and Instruments Institute (AMTII), Tehran University of Medical Sciences, Tehran, Iran ,grid.459564.f0000 0004 0482 9174Biomedical Engineering Department, Hamedan University of Technology, Hamedan, Iran
| | - Javad Fardmal
- grid.411950.80000 0004 0611 9280Department of Biostatistics, School of Public Health and Modeling of Noncommunicable Diseases Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Majid Sadeghifar
- grid.411807.b0000 0000 9828 9578Department of Statistics, Faculty of Science, Bu-Ali Sina University, Hamadan, Iran
| | - MohammadReza Nazemzadeh
- grid.411705.60000 0001 0166 0922Research Center for Molecular and Cellular Imaging, Advanced Medical Technologies and Instruments Institute (AMTII), Tehran University of Medical Sciences, Tehran, Iran ,grid.411705.60000 0001 0166 0922Physics and Biomedical Engineering Department, Tehran University of Medical Sciences, Tehran, Iran
| | - Jafar Mehvari Habibabadi
- grid.411036.10000 0001 1498 685XDepartment of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
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4
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McDonald CR. A journey with Steve Schachter as Editor-in-Chief: From first submission to fiber tract cover model. Epilepsy Behav 2022; 137:108807. [PMID: 36463038 DOI: 10.1016/j.yebeh.2022.108807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Accepted: 06/19/2022] [Indexed: 12/05/2022]
Affiliation(s)
- Carrie R McDonald
- Center for Multimodal Imaging and Genetics, University of California, San Diego, United States
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5
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Shen S, Dong Z, Zhang Q, Xiao J, Zhou D, Li J. The overlapping relationship among depression, anxiety, and somatic symptom disorder and its impact on the quality of life of people with epilepsy. Ther Adv Neurol Disord 2022; 15:17562864221138147. [PMID: 36518552 PMCID: PMC9742685 DOI: 10.1177/17562864221138147] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Accepted: 10/24/2022] [Indexed: 12/13/2022] Open
Abstract
Background: Emotional disorder is an important indicator for assessing the quality of life (QOL) of people with epilepsy (PWE). Depression, somatic symptom disorder (SSD) and anxiety are among the most frequently occurring mental disorders and overlap with each other. Objectives: This study examines the overlap of these three emotional disorders and their effects separately and in combination on the QOL of PWE. Design: Cross-sectional study. Data Sources and Methods: Adults attending our epilepsy clinic between 1 July 2020 and 1 May 2022 were consecutively enrolled. They were screened for depression, SSD, and anxiety by structured interviews, and demographic, epilepsy-related and QOL indicators were collected. Multivariate analysis, propensity score matching (PSM) and stratified analysis were used to explore the effects of their respective and combined effects on QOL. Results: Among the 749 patients, 189 patients (25%) were diagnosed with depression, 183 patients (24%) were diagnosed with SSD, and 157 patients (21%) were diagnosed with anxiety. The frequency of occurrence of each emotional disorder together with other emotional disorders was higher than the frequency of occurrence of an emotional disorder alone. Depression, SSD, and anxiety all had an independent effect on QOL of PWE ( p < 0.001). Depression had the greatest effect, followed by SSD, and then anxiety ( β: multivariate analysis, −11.0 versus –7.8 versus –6.5; PSM, −14.7 versus –9.4 versus –6.8). The QOL of PWE decreased more significantly with the increasing number of comorbid emotional disorders ( β: –12.1 versus –20.7 versus –23.0). Conclusion: It is necessary to screen for three emotional disorders, that is, depression, SSD, and anxiety, in PWE. Attention should be paid to people with multiple comorbid emotional disorders.
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Affiliation(s)
- Sisi Shen
- Department of Neurology, West China Hospital, Sichuan University, Chengdu, China
| | - Zaiquan Dong
- Mental Health Centre, West China Hospital, Sichuan University, Chengdu, China
| | - Qi Zhang
- Department of Neurology, West China Hospital, Sichuan University, Chengdu, China
| | - Jing Xiao
- Department of Neurology, West China Hospital, Sichuan University, Chengdu, China
| | - Dong Zhou
- Department of Neurology, West China Hospital, Sichuan University, No. 37 GuoXue Alley, Chengdu 610041, China
| | - Jinmei Li
- Department of Neurology, West China Hospital, Sichuan University, No. 37 GuoXue Alley, Chengdu 610041, China
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6
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Hermann BP, Struck AF, Busch RM, Reyes A, Kaestner E, McDonald CR. Neurobehavioural comorbidities of epilepsy: towards a network-based precision taxonomy. Nat Rev Neurol 2021; 17:731-746. [PMID: 34552218 PMCID: PMC8900353 DOI: 10.1038/s41582-021-00555-z] [Citation(s) in RCA: 58] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/10/2021] [Indexed: 02/06/2023]
Abstract
Cognitive and behavioural comorbidities are prevalent in childhood and adult epilepsies and impose a substantial human and economic burden. Over the past century, the classic approach to understanding the aetiology and course of these comorbidities has been through the prism of the medical taxonomy of epilepsy, including its causes, course, characteristics and syndromes. Although this 'lesion model' has long served as the organizing paradigm for the field, substantial challenges to this model have accumulated from diverse sources, including neuroimaging, neuropathology, neuropsychology and network science. Advances in patient stratification and phenotyping point towards a new taxonomy for the cognitive and behavioural comorbidities of epilepsy, which reflects the heterogeneity of their clinical presentation and raises the possibility of a precision medicine approach. As we discuss in this Review, these advances are informing the development of a revised aetiological paradigm that incorporates sophisticated neurobiological measures, genomics, comorbid disease, diversity and adversity, and resilience factors. We describe modifiable risk factors that could guide early identification, treatment and, ultimately, prevention of cognitive and broader neurobehavioural comorbidities in epilepsy and propose a road map to guide future research.
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Affiliation(s)
- Bruce P. Hermann
- Department of Neurology, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA.,
| | - Aaron F. Struck
- Department of Neurology, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA.,William S. Middleton Veterans Administration Hospital, Madison, WI, USA
| | - Robyn M. Busch
- Epilepsy Center and Department of Neurology, Neurological Institute, Cleveland Clinic, Cleveland, OH, USA.,Genomic Medicine Institute, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Anny Reyes
- Department of Psychiatry and Center for Multimodal Imaging and Genetics, University of California, San Diego, San Diego, CA, USA
| | - Erik Kaestner
- Department of Psychiatry and Center for Multimodal Imaging and Genetics, University of California, San Diego, San Diego, CA, USA
| | - Carrie R. McDonald
- Department of Psychiatry and Center for Multimodal Imaging and Genetics, University of California, San Diego, San Diego, CA, USA
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7
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Bragatti JA. Forced Normalization Revisited: New Concepts About a Paradoxical Phenomenon. Front Integr Neurosci 2021; 15:736248. [PMID: 34512281 PMCID: PMC8429494 DOI: 10.3389/fnint.2021.736248] [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: 07/04/2021] [Accepted: 08/02/2021] [Indexed: 11/17/2022] Open
Abstract
The phenomenon of Forced Normalization (FN) was first described by Landolt in 1953, who described the disappearance of epileptiform discharges in the EEG of patients with epilepsy, concomitant with the development of psychotic symptoms. Later, Tellenbach coined the term “alternative psychosis” referring specifically to the alternation between clinical phenomena. Finally, in 1991, Wolf observed a degenerative process involved in the phenomenon, which he called “paradoxical normalization.” Initially, FN was explained through experimental models in animals and the demonstration of the kindling phenomenon, in its electrical and pharmacological subdivisions. At this stage of research on the epileptic phenomenon, repetitive electrical stimuli applied to susceptible regions of the brain (hippocampus and amygdala) were considered to explain the pathophysiological basis of temporal lobe epileptogenesis. Likewise, through pharmacological manipulation, especially of dopaminergic circuits, psychiatric comorbidities began to find their basic mechanisms. With the development of new imaging techniques (EEG/fMRI), studies in the area started to focus on the functional connectivity (FC) of different brain regions with specific neuronal networks, which govern emotions. Thus, a series of evidence was produced relating the occurrence of epileptic discharges in the limbic system and their consequent coactivation and deactivation of these resting-state networks. However, there are still many controversies regarding the basic mechanisms of network alterations related to emotional control, which will need to be studied with a more homogeneous methodology, in order to try to explain this interesting neuropsychiatric phenomenon with greater accuracy.
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Affiliation(s)
- José Augusto Bragatti
- Clinical Neurophysiology Unit, Service of Neurology, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
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8
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Elkommos S, Mula M. A systematic review of neuroimaging studies of depression in adults with epilepsy. Epilepsy Behav 2021; 115:107695. [PMID: 33348194 DOI: 10.1016/j.yebeh.2020.107695] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 12/03/2020] [Accepted: 12/03/2020] [Indexed: 01/15/2023]
Abstract
OBJECTIVE Depression is a relatively common comorbidity in people with epilepsy with a lifetime history identified in 1 in 4 individuals. In this paper, we aimed to provide a systematic review of structural and functional brain region-specific group differences of adults with epilepsy and depression and to discuss existing evidence as compared to that in people with depression. METHODS We undertook a systematic review of neuroimaging studies of depression in adults with epilepsy through MEDLINE/PubMed, Embase and PsycInfo searches until June 2020. RESULTS A total of 44 studies were included in the qualitative synthesis: 21 on structural neuroimaging, 9 on functional, and 14 on pharmaco/metabolic neuroimaging. Almost all studies focused on temporal lobe epilepsy (TLE). Patterns of changes in the hippocampi and subcortical structures seem to be different from those reported in depression outside epilepsy. Cortical changes are grossly similar as well as the lack of any laterality effect. Serotonin dysfunction seems to be due to different mechanisms with reduced synaptic availability for depression in epilepsy as compared to reduced 5HT1 receptor density outside epilepsy. Depressive symptoms seem to correlate with a dysfunction in temporolimbic structures contralateral to the epileptogenic zone especially in patients with de novo postsurgical depression. CONCLUSIONS Depression, at least in TLE, seems to be associated with a different pattern of brain changes as compared to major depression, potentially supporting the notion of phenomenological peculiarities of depression in epilepsy.
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Affiliation(s)
- Samia Elkommos
- Atkinson Morley Regional Neuroscience Centre, St George's University Hospitals NHS Foundation Trust, London, United Kingdom
| | - Marco Mula
- Atkinson Morley Regional Neuroscience Centre, St George's University Hospitals NHS Foundation Trust, London, United Kingdom; Institute of Medical and Biomedical Education, St George's University of London, United Kingdom.
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9
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Morningstar M, Hung A, Mattson WI, Gedela S, Ostendorf AP, Nelson EE. Internalizing symptoms in intractable pediatric epilepsy: Structural and functional brain correlates. Epilepsy Behav 2020; 103:106845. [PMID: 31882324 DOI: 10.1016/j.yebeh.2019.106845] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 12/03/2019] [Accepted: 12/03/2019] [Indexed: 01/09/2023]
Abstract
Internalizing disorders (i.e., depression and anxiety) are common comorbidities in people with epilepsy. In adults with epilepsy, comorbid depression or anxiety is associated with worse seizure control and reduced quality of life, and may be linked to specific neural biomarkers. Less is known about brain correlates of internalizing symptoms in pediatric populations. In the current study, we performed a retrospective analysis of 45 youth between the ages of 6 and 18 years old with intractable epilepsy. Individuals were evaluated for internalizing symptoms on the Child Behavior Checklist (CBCL) and underwent magnetic resonance (MR) and fluorodeoxyglucose (FDG)-positron emission tomography (PET) imaging as part of the clinical evaluation for surgical treatment of epilepsy. Forty-two percent of patients experienced clinically significant internalizing symptoms based on parent report. Compared with individuals who scored in the normal range, youth with clinical levels of internalizing problems showed overall reductions in cortex volume, as well as widespread reductions in cortical thickness and functional activation in the bilateral occipital/parietal lobe, left temporal regions, and left inferior frontal cortex on MR and PET scans. There were no group differences in amygdala or hippocampus volumes, nor other patient- or illness-related variables such as age, sex, or the type, lateralization, or duration of epilepsy. Results suggest that high rates of internalizing disorders are present in youth with refractory epilepsy. Multifocal reductions in cortical thickness and function may be nonspecific risk factors for clinically meaningful internalizing symptoms in youth with chronic epilepsy. As such, the presence of broad cortical thinning and reduced glucose uptake upon radiological examination may warrant more focused clinical evaluation of psychological symptoms.
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Affiliation(s)
- Michele Morningstar
- Center for Biobehavioral Health, The Research Institute at Nationwide Children's Hospital, Columbus, OH, United States of America; Department of Pediatrics, The Ohio State University College of Medicine, Columbus, OH, United States of America.
| | - Andy Hung
- Center for Biobehavioral Health, The Research Institute at Nationwide Children's Hospital, Columbus, OH, United States of America
| | - Whitney I Mattson
- Center for Biobehavioral Health, The Research Institute at Nationwide Children's Hospital, Columbus, OH, United States of America
| | - Satyanarayana Gedela
- Department of Pediatrics and Neurology, Emory University College of Medicine, Atlanta, GA, United States of America
| | - Adam P Ostendorf
- Department of Pediatrics, The Ohio State University College of Medicine, Columbus, OH, United States of America; Department of Neurology, Nationwide Children's Hospital, Columbus, OH, United States of America
| | - Eric E Nelson
- Center for Biobehavioral Health, The Research Institute at Nationwide Children's Hospital, Columbus, OH, United States of America; Department of Pediatrics, The Ohio State University College of Medicine, Columbus, OH, United States of America
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10
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Nogueira MH, Pimentel da Silva LR, Vasques Moreira JC, de Rezende TJR, Zanão TA, de Campos BM, Yasuda CL, Cendes F. Major Depressive Disorder Associated With Reduced Cortical Thickness in Women With Temporal Lobe Epilepsy. Front Neurol 2020; 10:1398. [PMID: 32010051 PMCID: PMC6979005 DOI: 10.3389/fneur.2019.01398] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2019] [Accepted: 12/20/2019] [Indexed: 12/13/2022] Open
Abstract
Background: Major Depressive Disorder (MDD) is highly prevalent in patients with mesial temporal lobe epilepsy (MTLE), especially in women, carrying significant morbidity. This study aimed to investigate the cortical thickness (CT) abnormalities associated with MDD in women with MTLE and hippocampal atrophy (HA). Also, we investigated the impact of MDD upon the volumes of the hippocampus and amygdala in these patients. Methods: We included 50 women with MTLE and HA (20 left, LMTLE; 30 right, RMTLE), 41 healthy women in the control group, and 15 women with MDD without epilepsy. MTLE patients were subdivided into three groups: MTLE-without-MDD (23 MTLE patients without MDD), MTLE-mild-MDD (nine MTLE patients with mild symptoms of MDD), and MTLE-severe-MDD (18 MTLE patients with moderate to severe symptoms of MDD). The five groups were balanced for age (p = 0.56). All participants had high-resolution 3D T1-weighted images in a 3T scanner. We used FreeSurfer 6.0 for volumetry and CT parcellation. All participants were submitted to a clinical psychological evaluation through the Structured Clinical Interview for DSM-IV (SCID-IV) and completed the Beck Depression Inventory (BDI-II). Results: We identified a smaller ipsilateral amygdala volume (p = 0.04) in the MTLE-severe-MDD group when compared to the control group. Our results presented a reduced ipsilateral lateral orbitofrontal cortex (p = 0.02) in the MTLE-severe-MDD in comparison to the MTLE-mild-MDD group. We also identified a thinner ipsilateral fusiform gyrus (p < 0.01) in the MTLE-severe-MDD compared to both MTLE-without-MDD and control groups. A reduced CT of the contralateral superior frontal gyrus (p = 0.02) was observed in the MTLE-severe-MDD in comparison to the MTLE-mild-MDD group. Conclusions: The identification of areas with reduced CT and atrophy of the ipsilateral amygdala in women with MTLE and MDD suggest that the cortical thinning in the network of the paralimbic system is related to the co-occurrence and intensity of depressive symptoms in this group.
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Affiliation(s)
- Mateus Henrique Nogueira
- Laboratory of Neuroimaging, Department of Neurology, University of Campinas - UNICAMP, Campinas, Brazil.,The Brazilian Institute of Neuroscience and Neurotechnology - BRAINN, University of Campinas - UNICAMP, Campinas, Brazil
| | - Luciana Ramalho Pimentel da Silva
- Laboratory of Neuroimaging, Department of Neurology, University of Campinas - UNICAMP, Campinas, Brazil.,The Brazilian Institute of Neuroscience and Neurotechnology - BRAINN, University of Campinas - UNICAMP, Campinas, Brazil
| | - José Carlos Vasques Moreira
- Laboratory of Neuroimaging, Department of Neurology, University of Campinas - UNICAMP, Campinas, Brazil.,The Brazilian Institute of Neuroscience and Neurotechnology - BRAINN, University of Campinas - UNICAMP, Campinas, Brazil
| | - Thiago Junqueira Ribeiro de Rezende
- The Brazilian Institute of Neuroscience and Neurotechnology - BRAINN, University of Campinas - UNICAMP, Campinas, Brazil.,Laboratory of Medical Physics, University of Campinas - UNICAMP, Campinas, Brazil
| | - Tamires Araújo Zanão
- Laboratory of Neuroimaging, Department of Neurology, University of Campinas - UNICAMP, Campinas, Brazil.,The Brazilian Institute of Neuroscience and Neurotechnology - BRAINN, University of Campinas - UNICAMP, Campinas, Brazil
| | - Brunno Machado de Campos
- Laboratory of Neuroimaging, Department of Neurology, University of Campinas - UNICAMP, Campinas, Brazil.,The Brazilian Institute of Neuroscience and Neurotechnology - BRAINN, University of Campinas - UNICAMP, Campinas, Brazil
| | - Clarissa Lin Yasuda
- Laboratory of Neuroimaging, Department of Neurology, University of Campinas - UNICAMP, Campinas, Brazil.,The Brazilian Institute of Neuroscience and Neurotechnology - BRAINN, University of Campinas - UNICAMP, Campinas, Brazil
| | - Fernando Cendes
- Laboratory of Neuroimaging, Department of Neurology, University of Campinas - UNICAMP, Campinas, Brazil.,The Brazilian Institute of Neuroscience and Neurotechnology - BRAINN, University of Campinas - UNICAMP, Campinas, Brazil
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11
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Lin K, Stafstrom CE. Cognition, Behavior, and Psychosocial Effects of Seizures in the Developing Brain. Curr Top Behav Neurosci 2020; 55:3-15. [PMID: 33454920 DOI: 10.1007/7854_2020_189] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Epilepsy, a complex neurological disorder of recurrent seizures, is associated with significant impacts on the developing brain. Patients commonly face multiple comorbidities, including debilitating effects on cognition, behavior, and psychiatric outcomes. These conditions can be a source of great distress for patients that may even be greater than the burden of epilepsy itself. Here we investigate the relationship between seizures and the development of these comorbidities, specifically cognition, memory, learning, behavior, and psychiatric disorders. We first delineate the current research methodology in clinical and basic science that is employed to study the impact of epilepsy and seizures. We then explore neurobiological mechanisms underlying the development of seizures and cognitive and behavioral outcomes. Potential avenues of intervention to best support individuals and optimize their neurodevelopmental progress are also highlighted.
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Affiliation(s)
- Katerina Lin
- Division of Pediatric Neurology, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Carl E Stafstrom
- Division of Pediatric Neurology, The Johns Hopkins University School of Medicine, Baltimore, MD, USA.
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12
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Beghi E. Social functions and socioeconomic vulnerability in epilepsy. Epilepsy Behav 2019; 100:106363. [PMID: 31300385 DOI: 10.1016/j.yebeh.2019.05.051] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Accepted: 05/31/2019] [Indexed: 01/07/2023]
Abstract
Social functions are commonly impaired in people with epilepsy who are at increased risk of experiencing altered social cognition, communication problems, and interpersonal difficulties. Several factors are implicated, including developmental delay, seizure-related factors, somatic and psychiatric comorbidities, antiepileptic drugs (AEDs), and - not least - the effects of stigma. The variable interaction of all these factors can explain the differing pictures observed in the various epilepsy phenotypes but is also a source of interindividual variability depending on the strength of the effects of each factor on social cognition. This article is part of the Special Issue "Epilepsy and social cognition across the lifespan.
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Affiliation(s)
- Ettore Beghi
- Laboratory of Neurological Diseases, Department of Neuroscience, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Milan, Italy.
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13
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Butler T, Harvey P, Cardozo L, Zhu YS, Mosa A, Tanzi E, Pervez F. Epilepsy, depression, and growth hormone. Epilepsy Behav 2019; 94:297-300. [PMID: 30773449 PMCID: PMC7980784 DOI: 10.1016/j.yebeh.2019.01.022] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Revised: 01/14/2019] [Accepted: 01/19/2019] [Indexed: 11/16/2022]
Abstract
Depression affects a large proportion of patients with epilepsy, and is likely due in part to biological mechanism. Hormonal dysregulation due to the disruptive effects of seizures and interictal epileptiform discharges on the hypothalamic-pituitary-adrenal axis likely contributes to high rates of depression in epilepsy. This paper reviews the largely unexplored role of neuroendocrine factors in epilepsy-related depression, focusing on Growth Hormone (GH). While GH deficiency is traditionally considered a childhood disorder manifested by impaired skeletal growth, GH deficiency in adulthood is now recognized as a serious disorder characterized by impairments in multiple domains including mood and quality of life. Could high rates of depression in patients with epilepsy relate to subtle GH deficiency? Because GH replacement therapy has been shown to improve mood and quality of life in patients with GH deficiency, this emerging area may hold promise for patients suffering from epilepsy-related depression.
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Affiliation(s)
- Tracy Butler
- Center for Brain Health, New York University School of Medicine, Department of Psychiatry, 145 East 32nd Street, New York, NY 10016, United States of America.
| | - Patrick Harvey
- Center for Brain Health, New York University School of Medicine, Department of Psychiatry, 145 East 32nd Street, New York, NY 10016, United States of America
| | - Lila Cardozo
- Center for Brain Health, New York University School of Medicine, Department of Psychiatry, 145 East 32nd Street, New York, NY 10016, United States of America
| | - Yuan-Shan Zhu
- Clinical and Translational Science Center, Weill Cornell Medicine, 1300 York Avenue, New York, NY 10065, United States of America
| | - Adam Mosa
- University of Toronto School of Medicine, Division of Plastic and Reconstructive Surgery, 149 College Street, 5th Floor, Suite 508, Toronto, Ontario M5T 1P5, Canada
| | - Emily Tanzi
- Center for Brain Health, New York University School of Medicine, Department of Psychiatry, 145 East 32nd Street, New York, NY 10016, United States of America
| | - Fahad Pervez
- Clinical and Translational Science Center, Weill Cornell Medicine, 1300 York Avenue, New York, NY 10065, United States of America
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14
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Lai C, Guo S, Cheng L, Wang W. A Comparative Study of Feature Selection Methods for the Discriminative Analysis of Temporal Lobe Epilepsy. Front Neurol 2017; 8:633. [PMID: 29375459 PMCID: PMC5770628 DOI: 10.3389/fneur.2017.00633] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Accepted: 11/13/2017] [Indexed: 01/09/2023] Open
Abstract
It is crucial to differentiate patients with temporal lobe epilepsy (TLE) from the healthy population and determine abnormal brain regions in TLE. The cortical features and changes can reveal the unique anatomical patterns of brain regions from structural magnetic resonance (MR) images. In this study, structural MR images from 41 patients with left TLE, 34 patients with right TLE, and 58 normal controls (NC) were acquired, and four kinds of cortical measures, namely cortical thickness, cortical surface area, gray matter volume (GMV), and mean curvature, were explored for discriminative analysis. Three feature selection methods including the independent sample t-test filtering, the sparse-constrained dimensionality reduction model (SCDRM), and the support vector machine-recursive feature elimination (SVM-RFE) were investigated to extract dominant features among the compared groups for classification using the support vector machine (SVM) classifier. The results showed that the SVM-RFE achieved the highest performance (most classifications with more than 84% accuracy), followed by the SCDRM, and the t-test. Especially, the surface area and GMV exhibited prominent discriminative ability, and the performance of the SVM was improved significantly when the four cortical measures were combined. Additionally, the dominant regions with higher classification weights were mainly located in the temporal and the frontal lobe, including the entorhinal cortex, rostral middle frontal, parahippocampal cortex, superior frontal, insula, and cuneus. This study concluded that the cortical features provided effective information for the recognition of abnormal anatomical patterns and the proposed methods had the potential to improve the clinical diagnosis of TLE.
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Affiliation(s)
- Chunren Lai
- Department of Biomedical Engineering, South China University of Technology, Guangzhou, China.,Department of Radiation Oncology, The People's Hospital of Gaozhou, Gaozhou, China
| | - Shengwen Guo
- Department of Biomedical Engineering, South China University of Technology, Guangzhou, China
| | - Lina Cheng
- Medical Imaging Center, Guangdong 999 Brain Hospital, Guangzhou, China
| | - Wensheng Wang
- Medical Imaging Center, Guangdong 999 Brain Hospital, Guangzhou, China
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15
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Prefrontal lobe structural integrity and trail making test, part B: converging findings from surface-based cortical thickness and voxel-based lesion symptom analyses. Brain Imaging Behav 2017; 10:675-85. [PMID: 26399235 DOI: 10.1007/s11682-015-9455-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Surface-based cortical thickness (CT) analyses are increasingly being used to investigate variations in brain morphology across the spectrum of brain health, from neurotypical to neuropathological. An outstanding question is whether individual differences in cortical morphology, such as regionally increased or decreased CT, are associated with domain-specific performance deficits in healthy adults. Since CT studies are correlational, they cannot establish causality between brain morphology and cognitive performance. A direct comparison with classic lesion methods is needed to determine whether the regional specificity of CT-cognition correlations is similar to that observed in patients with brain lesions. We address this question by comparing the neuroanatomical overlap of effects when 1) whole brain vertex-wise CT is tested as a correlate of performance variability on a commonly used neuropsychological test of executive function, Trailmaking Test Part B (TMT-B), in healthy adults and 2) voxel-based lesion-symptom mapping (VBLSM) is used to map lesion location to performance decrements on the same task in patients with frontal lobe lesions. We found that reduced performance on the TMT-B was associated with increased CT in bilateral prefrontal regions in healthy adults and that results spatially overlapped in the left dorsomedial prefrontal cortex with findings from the VBLSM analysis in patients with frontal brain lesions. Findings indicate that variations in the structural integrity of the left dorsomedial prefrontal lobe, ranging from individual CT differences in healthy adults to structural lesions in patients with neurological disorders, are associated with poor performance on the TMT-B. These converging results suggest that the left dorsomedial prefrontal region houses a critical region for the complex processing demands of TMT-B, which include visuomotor tracking, sequencing, and cognitive flexibility.
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16
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Tao K, Wang X. The comorbidity of epilepsy and depression: diagnosis and treatment. Expert Rev Neurother 2016; 16:1321-1333. [PMID: 27327645 DOI: 10.1080/14737175.2016.1204233] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Kaiyan Tao
- Chongqing Key Laboratory of Neurology, Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Xuefeng Wang
- Chongqing Key Laboratory of Neurology, Center of Epilepsy, Beijing Institute for Brain Disorders, Beijing, China
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
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17
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Stretton J, Pope RA, Winston GP, Sidhu MK, Symms M, Duncan JS, Koepp M, Thompson PJ, Foong J. Temporal lobe epilepsy and affective disorders: the role of the subgenual anterior cingulate cortex. J Neurol Neurosurg Psychiatry 2015; 86:144-51. [PMID: 24876189 PMCID: PMC4316913 DOI: 10.1136/jnnp-2013-306966] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
OBJECTIVE Reduced deactivation within the default mode network (DMN) is common in individuals with primary affective disorders relative to healthy volunteers (HVs). It is unknown whether similar network abnormalities are present in temporal lobe epilepsy (TLE) patients with a history of affective psychopathology. METHODS 17 TLE patients with a lifetime affective diagnosis, 31 TLE patients with no formal psychiatric history and 30 HVs were included. We used a visuo-spatial 'n-back' paradigm to compare working memory (WM) network activation between these groups. Post hoc analyses included voxel-based morphometry and diffusion tensor imaging. The Beck Depression Inventory-Fast Screen and Beck Anxiety Inventory were completed on the day of scanning. FINDINGS Each group activated the fronto-parietal WM networks and deactivated the typical DMN in response to increasing task demands. Group comparison revealed that TLE patients with lifetime affective morbidity showed significantly greater deactivation in subgenual anterior cingulate cortex (sACC) than either the TLE-only or the HVs (p<0.001). This effect persisted after covarying for current psychotropic medication and severity of current depressive/anxiety symptoms (all p<0.001). Correlational analysis revealed that this finding was not driven by differences in task performance. There were no significant differences in grey matter volume or structural connectivity between the TLE groups. CONCLUSIONS Our results provide novel evidence suggesting that affective psychopathology in TLE has a neurobiological correlate, and in this context the sACC performs differently compared with network activity in primary affective disorders.
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Affiliation(s)
- J Stretton
- Epilepsy Society MRI Unit, Department of Clinical and Experimental Epilepsy, Institute of Neurology, University College London, London, UK MRC Cognition and Brain Science Unit, Cambridge, UK
| | - R A Pope
- Epilepsy Society MRI Unit, Department of Clinical and Experimental Epilepsy, Institute of Neurology, University College London, London, UK Clinical Psychopharmacology Unit, University College London, London, UK
| | - G P Winston
- Epilepsy Society MRI Unit, Department of Clinical and Experimental Epilepsy, Institute of Neurology, University College London, London, UK
| | - M K Sidhu
- Epilepsy Society MRI Unit, Department of Clinical and Experimental Epilepsy, Institute of Neurology, University College London, London, UK
| | - M Symms
- Epilepsy Society MRI Unit, Department of Clinical and Experimental Epilepsy, Institute of Neurology, University College London, London, UK
| | - J S Duncan
- Epilepsy Society MRI Unit, Department of Clinical and Experimental Epilepsy, Institute of Neurology, University College London, London, UK
| | - M Koepp
- Epilepsy Society MRI Unit, Department of Clinical and Experimental Epilepsy, Institute of Neurology, University College London, London, UK
| | - P J Thompson
- Epilepsy Society MRI Unit, Department of Clinical and Experimental Epilepsy, Institute of Neurology, University College London, London, UK
| | - J Foong
- Epilepsy Society MRI Unit, Department of Clinical and Experimental Epilepsy, Institute of Neurology, University College London, London, UK
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18
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Pittau F, Mégevand P, Sheybani L, Abela E, Grouiller F, Spinelli L, Michel CM, Seeck M, Vulliemoz S. Mapping epileptic activity: sources or networks for the clinicians? Front Neurol 2014; 5:218. [PMID: 25414692 PMCID: PMC4220689 DOI: 10.3389/fneur.2014.00218] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2014] [Accepted: 10/08/2014] [Indexed: 01/03/2023] Open
Abstract
Epileptic seizures of focal origin are classically considered to arise from a focal epileptogenic zone and then spread to other brain regions. This is a key concept for semiological electro-clinical correlations, localization of relevant structural lesions, and selection of patients for epilepsy surgery. Recent development in neuro-imaging and electro-physiology and combinations, thereof, have been validated as contributory tools for focus localization. In parallel, these techniques have revealed that widespread networks of brain regions, rather than a single epileptogenic region, are implicated in focal epileptic activity. Sophisticated multimodal imaging and analysis strategies of brain connectivity patterns have been developed to characterize the spatio-temporal relationships within these networks by combining the strength of both techniques to optimize spatial and temporal resolution with whole-brain coverage and directional connectivity. In this paper, we review the potential clinical contribution of these functional mapping techniques as well as invasive electrophysiology in human beings and animal models for characterizing network connectivity.
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Affiliation(s)
- Francesca Pittau
- EEG and Epilepsy Unit, Neurology Department, University Hospitals and Faculty of Medicine of Geneva , Geneva , Switzerland
| | - Pierre Mégevand
- Laboratory for Multimodal Human Brain Mapping, Hofstra North Shore LIJ School of Medicine , Manhasset, NY , USA
| | - Laurent Sheybani
- Functional Brain Mapping Laboratory, Department of Fundamental Neurosciences, University of Geneva , Geneva , Switzerland
| | - Eugenio Abela
- Support Center of Advanced Neuroimaging (SCAN), Institute for Diagnostic and Interventional Neuroradiology, University Hospital Inselspital , Bern , Switzerland
| | - Frédéric Grouiller
- Radiology Department, University Hospitals and Faculty of Medicine of Geneva , Geneva , Switzerland
| | - Laurent Spinelli
- EEG and Epilepsy Unit, Neurology Department, University Hospitals and Faculty of Medicine of Geneva , Geneva , Switzerland
| | - Christoph M Michel
- Functional Brain Mapping Laboratory, Department of Fundamental Neurosciences, University of Geneva , Geneva , Switzerland
| | - Margitta Seeck
- EEG and Epilepsy Unit, Neurology Department, University Hospitals and Faculty of Medicine of Geneva , Geneva , Switzerland
| | - Serge Vulliemoz
- EEG and Epilepsy Unit, Neurology Department, University Hospitals and Faculty of Medicine of Geneva , Geneva , Switzerland
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Kemmotsu N, Kucukboyaci NE, Cheng CE, Girard HM, Tecoma ES, Iragui VJ, McDonald CR. Alterations in functional connectivity between the hippocampus and prefrontal cortex as a correlate of depressive symptoms in temporal lobe epilepsy. Epilepsy Behav 2013; 29:552-9. [PMID: 24176688 PMCID: PMC3876964 DOI: 10.1016/j.yebeh.2013.09.039] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Revised: 09/05/2013] [Accepted: 09/29/2013] [Indexed: 11/18/2022]
Abstract
Depression is a common comorbidity in temporal lobe epilepsy (TLE) that is thought to have a neurobiological basis. This study investigated the functional connectivity (FC) of medial temporal networks in depression symptomatology of TLE and the relative contribution of structural versus FC measures. Volumetric MRI and functional connectivity MRI (fcMRI) were performed on nineteen patients with TLE and 20 controls. The hippocampi and amygdalae were selected as seeds, and five prefrontal and five cingulate regions of interest (ROIs) were selected as targets. Low-frequency blood-oxygen-level-dependent signals were isolated from fcMRI data, and ROIs with synchronous signal fluctuations with the seeds were identified. Depressive symptoms were measured by the Beck Depression Inventory-II. The patients with TLE showed greater ipsilateral hippocampal atrophy (HA) and reduced FC between the ipsilateral hippocampus and the ventral posterior cingulate cortex (vPCC). Neither HA nor hippocampal-vPCC FC asymmetry was a robust contributor to depressive symptoms. Rather, hippocampal-anterior prefrontal FC was a stronger contributor to depressive symptoms in left TLE (LTLE). Conversely, right amygdala FC was correlated with depressive symptoms in both patient groups, with a positive and negative correlation in LTLE and right TLE (RTLE), respectively. Frontolimbic network dysfunction is a strong contributor to levels of depressive symptoms in TLE and a better contributor than HA in LTLE. In addition, the right amygdala may play a role in depression symptomatology regardless of the side of the epileptogenic focus. These findings may inform the treatment of depressive symptoms in TLE and inspire future research to help guide surgical planning.
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Affiliation(s)
- Nobuko Kemmotsu
- University of California San Diego Multimodal Imaging Laboratory, 8950 Villa La Jolla Dr., Suite C101, La Jolla, CA 92037, USA; Department of Psychiatry, University of California, San Diego, CA, USA.
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20
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Cataldi M, Avoli M, de Villers-Sidani E. Resting state networks in temporal lobe epilepsy. Epilepsia 2013; 54:2048-59. [PMID: 24117098 DOI: 10.1111/epi.12400] [Citation(s) in RCA: 132] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/30/2013] [Indexed: 12/17/2022]
Abstract
Temporal lobe epilepsy (TLE) is typically described as a neurologic disorder affecting a cerebral network comprising the hippocampus proper and several anatomically related extrahippocampal regions. A new level of complexity was recently added to the study of this disorder by the evidence that TLE also appears to chronically alter the activity of several brain-wide neural networks involved in the control of higher order brain functions and not traditionally linked to epilepsy. Recently developed brain imaging techniques such as functional magnetic resonance imaging (fMRI) analysis of resting state connectivity, have greatly contributed to these observations by allowing the precise characterization of several brain networks with distinct functional signatures in the resting brain, and therefore also known as "resting state networks." These significant advances in imaging represent an opportunity to investigate the still elusive origins of the disabling cognitive and psychiatric manifestations of TLE, and could have important implications for its pathophysiology and, perhaps, its therapy. Herein we review recent studies in this field by focusing on resting state networks that have been implicated in the pathophysiology of psychiatric disorders and cognitive impairment in patients with epilepsy: the default mode network, the attention network, and the reward/emotion network.
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Affiliation(s)
- Mauro Cataldi
- Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatologic Sciences, Federico II University of Naples, Naples, Italy
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21
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Valente KDR, Busatto Filho G. Depression and temporal lobe epilepsy represent an epiphenomenon sharing similar neural networks: clinical and brain structural evidences. ARQUIVOS DE NEURO-PSIQUIATRIA 2013; 71:183-90. [DOI: 10.1590/s0004-282x2013000300011] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2012] [Indexed: 11/22/2022]
Abstract
The relationship between depression and epilepsy has been known since ancient times, however, to date, it is not fully understood. The prevalence of psychiatric disorders in persons with epilepsy is high compared to general population. It is assumed that the rate of depression ranges from 20 to 55% in patients with refractory epilepsy, especially considering those with temporal lobe epilepsy caused by mesial temporal sclerosis. Temporal lobe epilepsy is a good biological model to understand the common structural basis between depression and epilepsy. Interestingly, mesial temporal lobe epilepsy and depression share a similar neurocircuitry involving: temporal lobes with hippocampus, amygdala and entorhinal and neocortical cortex; the frontal lobes with cingulate gyrus; subcortical structures, such as basal ganglia and thalamus; and the connecting pathways. We provide clinical and brain structural evidences that depression and epilepsy represent an epiphenomenon sharing similar neural networks.
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Abstract
Children with epilepsy are at risk for behavioral and cognitive comorbidities. Potential etiologies can be assessed in part by neuroimaging. Functional magnetic resonance imaging (MRI) has a major role in presurgical evaluation and prediction of postoperative outcome by mapping of language and memory. Structural MRI and functional MRI have shown changes in children and adolescents with attention deficit hyperactivity disorder and disruptive behavior, common comorbidities in children with epilepsy. Neuroimaging has the potential for significantly increasing understanding of the basis of cognitive and behavioral problems in children with epilepsy.
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Abstract
Epilepsy is a common neurological disorder that is complicated by psychiatric, cognitive, and social comorbidities that have become a major target of concern and investigation in view of their adverse effect on the course and quality of life. In this report we define the specific psychiatric, cognitive, and social comorbidities of paediatric and adult epilepsy, their epidemiology, and real life effects; examine the relation between epilepsy syndromes and the risk of neurobehavioural comorbidities; address the lifespan effect of epilepsy on brain neurodevelopment and brain ageing and the risk of neurobehavioural comorbidities; consider the overarching effect of broader brain disorders on both epilepsy and neurobehavioural comorbidities; examine directions of causality and the contribution of selected epilepsy-related characteristics; and outline clinic-friendly screening approaches for these problems and recommended pharmacological, behavioural, and educational interventions.
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Affiliation(s)
- Jack J. Lin
- Department of Neurology, University of California at Irvine, Irvine, California, USA
| | - Marco Mula
- Amedeo Avogadro University, Novara, Italy
| | - Bruce P. Hermann
- Department of Neurology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
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