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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Analysis of Interictal Epileptiform Discharges in Mesial Temporal Lobe Epilepsy Using Quantitative EEG and Neuroimaging

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Author(s):
Fujisao, Elaine Keiko [1] ; Alves, Karen Fernanda [1] ; Rezende, Thais O. P. [1] ; Betting, Luiz Eduardo [1]
Total Authors: 4
Affiliation:
[1] UNESP Univ Estadual Paulista, Fac Med Botucatu, Dept Neurol Psiquiat & Psicol, Botucatu, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: FRONTIERS IN NEUROLOGY; v. 11, NOV 26 2020.
Web of Science Citations: 0
Abstract

Objective: Investigate areas of correlation between gray matter volumes by MRI and interictal EEG source maps in subtypes of mesial temporal lobe epilepsy (MTLE). Method: 71 patients and 36 controls underwent 3T MRI and and routine EEG was performed. Voxel-based morphometry (VBM) was used for gray matter analysis and analysis of interictal discharge sources for quantitative EEG. Voxel-wise correlation analysis was conducted between the gray matter and EEG source maps in MTLE subtypes. Results: The claustrum was the main structure involved in the individual source analysis. Twelve patients had bilateral HA, VBM showed bilateral hippocampal. Twenty-one patients had right HA, VBM showed right hippocampal and thalamic atrophy and negatively correlated involving the right inferior frontal gyrus and insula. Twenty-two patients had left HA, VBM showed left hippocampal atrophy and negatively correlated involving the left temporal lobe and insula. Sixteen patients had MTLE without HA, VBM showed middle cingulate gyrus atrophy and were negatively correlated involving extra-temporal regions, the main one located in postcentral gyrus. Conclusions: Negative correlations between gray matter volumes and EEG source imaging. Neuroanatomical generators of interictal discharges are heterogeneous and vary according to MTLE subtype. Significance: These findings suggest different pathophysiological mechanisms among patients with different subtypes of MTLE. (AU)

FAPESP's process: 16/17914-3 - Effect of antiepileptic drugs and of epileptiform discharges in the functional connectivity of patients with juvenile myoclonic epilepsy
Grantee:Luiz Eduardo Gomes Garcia Betting
Support Opportunities: Regular Research Grants