Article Figures & Data
Figures
- Fig 1.
Left MTLE (patient 6). A, Scalp EEG (average reference montage) and IC-factor coding for the interictal spike with left temporal maximum. B, PA BOLD signal cluster in the left hippocampus head. C, If one applies the FAV criterion, BOLD signal correlates encompass the left hippocampal formation (diagnostic cluster) and parts of the epileptic network in MTLE, including the ipsilateral insula, frontal operculum, and fronto-orbital and temporo-occipital brain areas. D, The FWE approach discloses additional bilateral BOLD signal clusters not identified in B and C.
- Fig 2.
Right frontal lobe epilepsy and frontal focal cortical dysplasia (patient 12). A, Scalp EEG (average reference montage) and IC-factor coding for the interictal spike with right frontal maximum. B, Misleading localization of the PA in the right inferior parietal lobule (crosshair). C, FAV delineates a BOLD signal cluster matching the right frontal focal cortical dysplasia/SOZ (crosshair). D, The widespread BOLD signal correlates obtained by the FWE were not of use in planning of invasive EEG recordings. E, BOLD time course of the right frontal SOZ (red, in a percentage of signal change). Time course of the independent component factor derived from the EEG data after convolution with the hemodynamic response function representing the epileptic activity (black).
Tables
Concordance of electroclinical data and the EEG/fMRI analysis in MTLE
No. MTLE OP/Engel Class EEG/fMRI: PA FWE FAV 1 R Yes/Ia + + + 2 R Yes/Ia + − (bilat) + 3 R Yes/Ia − (PrG L) − (no) + 4 R No − (ACgG L) + + 5 R Yes/Ia No IEDs 6 L No + + + 7 R Yes/II + + + 8 R Yes/IV No IEDs 9 R Yes/Ia − (PCgG R) + + 10 R Yes/Ia + + + -
Note:—R indicates right; L, left; Op, operation; bilat, bilateral; + indicates unilateral BOLD signal cluster in the epileptogenic hippocampal formation; −, no or bilateral BOLD cluster in the hippocampal formation; PCgG, posterior cingulate gyrus; PrG, precentral gyrus; ACgC, anterior cingulate gyrus. For PA in brackets the localization of the PA cluster.
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