Fig. 3

Ictal phase electroencephalogram of patient 1. One clinical seizure was detected, which presented as a nauseous feeling and oropharyngeal automatism with impaired awareness, and the seizure lasted approximately 50 s second before sudden movement interruption of the patient, EEG showed widespread low voltage in the right leads, followed by rapid rhythmic changes with low amplitude in the right middle-posterior temporal region initially, and spreading to the right middle temporal region 2 s later. The amplitude increased and the frequency decreased gradually and then spread to adjacent leads, accompanied by electromyogram interference and motion artifacts