Seizures that cause loss of consciousness (LOC) can be classified as e
pileptic or nonepileptic based on evaluation of ictal semiology and an
alysis of changes in EEG events, recorded with continuous scalp EEG an
d video monitoring, We report 3 patients who had hippocampal electrogr
aphic seizures documented with intracranial EEG recording with no acco
mpanying scalp EEG change immediately preceding psychogenic unresponsi
veness. Each patient also had complex partial seizures (CPS) originati
ng in the hippocampus. Some individuals can have complex interactions
of epileptic and nonepileptic seizures.