November 1975

REM Phase Deprivation and Schizophrenia II

Author Affiliations

From the Department of Psychiatry, Stanford University School of Medicine and the Palo Alto Veterans Administration Hospital, Calif. Dr Azumi is now with the Tokyo University School of Medicine. Dr Pivik was a National Institute of Mental Health Biosciences Predoctoral Fellow, Stanford University.

Arch Gen Psychiatry. 1975;32(11):1431-1436. doi:10.1001/archpsyc.1975.01760290099012

• Nine schizophrenic patients with active symptomatology were compared with seven patient controls in their response to two nights of rapid eye movement (REM) sleep deprivation. The control subjects demonstrate "normal" increases in total REM and percentage REM time increase on recovery nights compared to base line nights. The schizophrenic subjects differ substantially from the control subjects in both these measurements and show no perceptible change from base line nights on recovery nights.

The effects of medication, anxiety, sleep loss, ceiling effects, and intensity change were not considered adequate to account for the above results. However, many questions, such as the specificity of this rebound failure to the schizophrenic patients and the possibility of a sleep disturbance factor operating independently of psychiatric diagnosis, remain to be answered.