EEG abnormality EEG with photoparoxysmal response 2010-07-11T08:10:17Z Photoparoxysmal response on EEG UMLS:C3552821 HP:0010852 In some patients, seizures can be provoked by specific external factors (reflex epilepsy), including flickering lights and patterns. These patients commonly show epileptiform discharges in the EEG when stimulated with flashing lights, black and white striped patterns and television. These evoked EEG abnormalities are called photoparoxysmal responses. EEG abnormalities (epileptiform discharges) evoked by flashing lights or black and white striped patterns. HP:0001330