1993 Volume 11 Issue 1 Pages 9-14
It is well-known that visual stimulation in terms of pattern reversal stimulation induces epileptic seizures in some patients. Cognitive function was tested in 5 patients with patternsensitive epilepsy during visual stimulation. Response time changed in relation to seizure discharges in EEG. If epileptogenic activity is the initial trigger of the functional change in the brain during visual stimulation, it will be accepted that all of the functional abnormalities of the brain have relationship to seizure discharges in EEG. However, the response errors increased in relation to the kind of stimulation rather than seizure discharges. It may be conjectured that the visual stimulation per segives rise to a functional change in the brain which does not depend on seizure discharges. It is conceivable that the functional change reduces the threshold of epileptogenic activity.
