Somatosensory evoked potentials and EEG findings in siblings of juvenile myoclonic epilepsy patients.

Purpose: In order to demonstrate cortical hyperexitability and to determine the efficacy of 'SEP of high amplitude (HASEP) in detecting asymptomatic relatives of JME patients, we evaluated the EEG findings and SEP in asymptomatic siblings of JME patients.

Methods: We analysed the EEG and SEP findings of 37 JME patients and 48 asymptomatic siblings of 27 patients and compared the results with healthy volunteers.

Results: Of 13 asymptomatic siblings with EEG abnormalities (27.

Auditory event-related potentials (P300) in partial and generalized epileptic patients.

We evaluated the P300 components of event-related potentials (ERP) in 64 cryptogenic partial epilepsy (CPE) patients, and 52 idiopathic generalized epilepsy (IGE) patients as well as in their age-matched control groups. The P200, N200 and P300 latencies recorded from Cz were significantly longer in CPE patients compared with those of their control group (P = 0.0371, P = 0.