Fig. 1
From: Interictal and Ictal MEG in presurgical evaluation for epilepsy surgery
Comparison of EEG, MEG and combined EEG/MEG (EMEG) localization with epileptic activity detected in invasive EEG. a Quantitative comparison of MEG/EEG source localization stereoelectroencephalography (SEEG) contacts. Square distance index and the percentage of dipoles closer than 10 mm for each SEEG contact. Values are given for EEG and MEG/EEG subaverages of 10 spikes. The point of time for source localization was at − 23 ms before spike peak. Dashed lines enclose SEEG contacts within the seizure onset zone [17]. The simultaneous MEG/EEG source localization was mostly (compared to EEG or MEG) congruent with the invasive SEEG-delineated seizure onset electrodes. b The position of SEEG depth electrodes in the investigated patient