PSEUDOEPILEPTIFORM EEG PATTERNS DURING PSEUDOSEIZURES

Seven seizures, recorded from three patients, showed electrographic findings suggestive of epileptic seizures. However, careful analysis of the EEGs revealed multiple phase reversals and electrical field inconsistencies. Time-synchronized video recording confirmed that the patterns represented movement artifacts due to the patients shaking their heads, upper extremities, or bodies with secondary movement of electrodes, electrode wires, or electrode boxes. This series of patients highlights the importance of careful analysis of the data in the differentiation of psychogenic from epileptic seizures.