Figure 3. Electroencephalogram of Patient 3 showing nonconvulsive status epilepticus. (A) Generalized spike-and-wave discharges with a frequency of 2.5-3.5 Hz appeared simultaneously over both hemispheres (arrow), although the seizure may have originated from a focus in one frontal lobe. (B) The seizure persisted for about 36 minutes during which the patient was confused and disoriented with verbal output limited to one- or two-word responses.