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.

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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). 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. . . Exp Neurobiol. 2016 Apr;25(2):93-101. http://dx.doi.org/10.5607/en.2016.25.2.93