• This research was accomplished at the U. S. Naval Hospital, San Diego, and was supported in part by National Science Foundation Grants GB-922 and GB-3961 to the San Diego State College Foundation, and by the Bureau of Medicine and Surgery, Department of the Navy, under Research Task MR005.12-2304. The opinions and assertions contained herein are the private ones of the writers, and are not to be construed as official, or as reflecting the views of the Navy Department or the Naval service at large.

  • The assistance of Kay Van Kirk, Tom Bateman, Marion Austin, and Randy Gardner is gratefully acknowledged.

Address requests for reprints to: Dr. Laverne C. Johnson, Neuropsychiatric Research, Bldg. 36-4, U. S. Naval Hospital, San Diego, California 92134.


Spontaneous electrodermal activity (EDA) (galvanic skin response [GSR] and skin potential response [SPR]) was recorded during daytime sleep and nighttime sleep. During all sleep, spontaneous EDA occurred most frequently during stages 3 and 4 (slow wave sleep) and least frequently during stage 1 (rapid eye movement [REM] and non-REM). This pattern was consistent over 3 nights of sleep. There was no relation between waking and sleeping spontaneous EDA. The spontaneous EDA during slow wave sleep significantly exceeded that during waking. During sleep, spontaneous SPRs often occurred without spontaneous GSRs.