Fig. 1

(EEG results of case 1): a. Before treatment, interictal sleep VEEG showed that in seizure interval there were extensive 1.5-2.5 Hz, high amplitude slow spike slow waves and focal spinous slow waves in occipital or prefrontal region; b-c. Epileptic discharges could be seen in the seizure period before treated, considering eyelid myoclonus and atypical absence seizures (In the picture b, the child sitting on the bed with her head slightly tilted back and her eyes blinking; in the picture c, the child sitting on the bed with her eyes looking forward without obvious movement); d. After treatment, EEG during sleep proved no obvious epileptiform discharge. Electromyogram: a,b,c (on both deltoid muscles) & d (on both deltoid muscles and both quadriceps femoris muscles)