Fig. 1. Electroencephalogram (EEG) of ictal and interictal state at pre-gamma knife radiosurgery (GKS), and at 30 months after GKS. At pre-GKS, ictal EEG demonstrated evolution from rhythmic delta wave to sharp wave in left temporal area, suggesting left temporal onset epilepsy (A). A spike and intermittent semi-rhythmic slow activity in left temporal area was shown in interictal EEG at pre-GKS (B). EEG performed at 30 months after GKS revealed no slow activity or epileptiform discharges, in accord with normal finding (C).
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