Objective To investigate the cognitive function impairment from electrical status epilepticus duringsleep(ESES).Method To followup 25 benign childhood epilepsy with centro-temporal spikes(BECT)and ESES,25age and sex-matched BECTand without ESES were collected as control group.They were progressed intelligence testswith Wechsler Intelligence Scale for children-revised.Results There were significant differences on verbal intelligencequotient(VIQ) and performance intelligence quotien(PIQ) and full-scale intell...