Abstract
Though some scholars including Gibbses studied about the variation of sleep spindle, few payed attention to its frequency. On the other hand, until now, many investigations were reported about the EEG abnormality of atypical psychosis, but few of them were studied on its sleep EEG. Recently, we had a chance of recording sleep EEG of a case of atypical psychosis. Her EEG finding was interesting for spindles of disproportionate frequency to its sleep stage during clinical acute period. Then, we present a part of her EEG and some considerations.
