Body Movements During Sleep After Sleep Loss


  • This study was supported, in part, by National Science Foundation Grant No. GB-14829 to the California State University, San Diego, Foundation (Drs. L. C. Johnson and A. Lubin), and by Department of the Navy, Bureau of Medicine and Surgey, under Task No. MF12524-9008DA5G. The opinions or assertions contained herein are the private ones of the authors and are not to be construed as official or as reflecting the views of the Navy Department.

  • Dr. Muzet is now at Centre d'Etudes Bioclimatiques du C.N.R.S., Strasbourg, France.

Address requests for reprints to: P. Naitoh, Ph.D., Navy Medical Neuropsychiatric Research Unit, San Diego, California 92152.


Following 4 baseline nights, 7 Ss were deprived of REM sleep for 3 nights and 7 were deprived of stage 4 sleep. Both groups were then deprived of total sleep for 1 night and then allowed 2 nights of uninterrupted recovery sleep. Compared to baseline nights, on the first recovery night the number of body movements was significantly reduced in all sleep stages and for total sleep. On the second recovery night, the number of movements was back to baseline level. The increased amount of slow-wave sleep (stages 3 and 4) during recovery sleep was not the primary reason for the reduced body motility.