Visual evoked potentials in epilepsy

In the literature. results of VEP studies in epi-lepsy appear tü be controversial. This picture is li-kely due tü the technique diverselv used and the re-latively small numbeı- of the patients groups. Pattern-reversal VEP are recorded in 24 patients with photosensitive (FS) discharges in EEG, and other 21 patients with epilepsy. VE? amplitudes show no dUlerences from those of normal control groups. P100 mean latency of non-fotosensitive group is not prolonged in the patients who are un-derınedication, nor is. it in the ones who have not been administered the drugs (valproic acide and carbamazepine) yet. The latency is founded to be normal in FS gı-o-ups. The impression that the effects of the drugs on VEP reflect dğyerently in this group is eliceted. it is considered that the results may indıcate dğferent pathogenetical mechanisirn in FS group.