(A) Elementary visual hallucinations as perceived and drawn by eight of the nine patients with IOEVH. First and second row from left to right: the illustrations.

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Presentation transcript:

(A) Elementary visual hallucinations as perceived and drawn by eight of the nine patients with IOEVH. First and second row from left to right: the illustrations of patients 1 to 6 are consecutively presented. (A) Elementary visual hallucinations as perceived and drawn by eight of the nine patients with IOEVH. First and second row from left to right: the illustrations of patients 1 to 6 are consecutively presented. Third row from left to right: the illustrations of patient 7 (left) and 8 at onset (middle) and just before progressing to loss of consciousness and GTCS (right). (B) From video-EEG recordings. First row: high amplitude occipital paroxysms from video-EEG of patient 3. They were immediately activated by closing the eyes and persisted as long as the eyes were closed. Opening the eyes immediately eliminated the occipital paroxysms for as long as the eyes were opened. The occipital paroxysms were similarly activated in conditions of elimination of fixation and central vision (darkness, vision through goggles covered with semitransparent tape) and inhibited in conditions that these were preserved (fixation off sensitivity). Second row: low amplitude, occipital fast rhythms intermixed with spikes from video-EEG of patient 6. These occurred immediately after closing the eyes. They did not persist during the remaining period that the eyes were closed. Contrary to the occipital paroxysms of patient 3, they were eliminated in darkness and the patient also had time locked occipital spikes induced by intermittent photic stimulation. C P Panayiotopoulos J Neurol Neurosurg Psychiatry 1999;66:536-540 ©1999 by BMJ Publishing Group Ltd