Further observations on electrophysiological sleep patterns in schizophrenia

Electrophysiological studies of sleep patterns in a group of eighteen actively ill schizophrenic patients and ten non-schizophrenic control subjects yielded the following results: the schizophrenic patients required a significantly longer time to fall asleep and showed greater variability in the amount of sleep occurring prior to the onset of first dream than did the control subjects. Patients classified as hallucinating showed significantly higher density of eye-movement activity during their dream periods than non-hallucinating schizophrenic patients.