Figure 1.

Serial electroencephalographies of the patient without sedation. (A) Recording on day 2 showed background rhythm was taken place by abnormal diffuse low-voltage fast-activities, when patient was alert but with psychiatric symptoms. (B) Recording on day 11 revealed aberrant universal delta activity, when patient was in coma. (C) Recording on day 34 (8^th day after teratoma removal) demonstrated the return of background alpha rhythm with few theta activity, when the patient's conscious was recovered without oral-facial dyskinesias or extremities convulsions. (D) Recording on day 44 (18^th day after teratoma removal) showed a normal alpha activity. The calibration marks represent 1 second and 100 μV.