Photically Evoked Potentials (PEPs) in Brain Disorders

Abstract

Photically evoked potentials (PEPs) led from the occipital area were recorded from 37 patients of cerebral disorder. These included 11 grand mal epilepsies, 8 petit mal and psychomotor epilepsies, 16 brain tumors and 12 cerebrovascular disorders. The patterns of PEPs consisted of a small initial deflection and the following waves alternating the polarity from the 1st to the 7th successively in order. In epilepsy the culmination time (CT) of each component tended to be shortened and the amplitude tended to be larger than normals. In vascular lesion and brain tumor, the CT tended to delay.