Electroencephalographic studies were carried out on 30 patients with "illusions of memory": 29 had unilateral discharges in the temporal lobe and one had bilateral discharges in the temporal lobes. Eighteen patients showed focal discharges in the left temporal lobe and 11 in the right temporal lobe. In 21 patients the electroencephalogram showed subcortical discharges and in 9 cases focal cortical discharges.