Photosensitive partial seizures.

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  • 光過敏性部分発作

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We report five children (1 boy, 4 girls) with photosensitive partial seizures. They had recurrent partial seizures which were induced by environmental light or stroboscopic test. The onset ranged from 3 to 12 years, and no one had the abnormality of the psychomotor development and neurological finding, except for the seizures. On the interictal EEGs, photoconvulsive responses were observed in all and focal spikes in 3. The ictal EEG was recorded during photic stimulation in two patients. In both of them, rhythmic spikes started in the occipitl area. The other three children had visual seizures represented by visual loss or flickering light on the sight, which were followed by generalized motor seizures, adversive seizures, vertigo and eye lids flutter. The clinicoelectrical features observed in our case seem to suggest that the abnormal discharges may originate only from the occipital area in photosensitive partial seizures, which was also mentioned by Jasper.

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