Background:During the course of BECT, some patients increased the new formof attack or seizure frequency, some patients can have language barriers、abnormal behavior and cognitive impairment, the EEG shows abundance of spikeand waves in Rolandic areas, some patients of the discharge index in the non-rapideye movements (NREM) were more than85%, so called BECT variant. BECT variantof the form of attack,clinical charateristics,treatment and clinical featuresand congnitive impairment is significantly different f...