Ictal EEG of Patient 1. (A) Initial 8-Hz rhythmic waves with Cz and C3 predominance (*1) were followed by 13-Hz rhythmic waves predominantly at Cz (*2), which then gradually changed to diffuse slow waves (*3). These rhythmic waves terminated as high-amplitude, diffuse, slow wave bursts with spikes over the bilateral frontal area. Motion artefacts due to postictal oral automatism were present on bilateral temporal traces (*4). (B) Ictal EEG of Patient 1 during the same series of clusters. The ictal rhythmic sequence was predominantly on the left side.