A STUDY OF LONG AND SHORT SLEEPERS
Final comprehensive rept.
MASSACHUSETTS MENTAL HEALTH RESEARCH CORP BOSTON
Pagination or Media Count:
Adult males who always sleep less than six hours or more than nine hours per day were studied. Over 400 were screened smaller numbers had various psychological tests and psychiatric interviews, and finally 29, free of overt medical or psychiatric pathology, were studied in the laboratory for 8 nights each of all-night polygraphic recording. Psychologically the short sleepers were efficient, hard-working, and somewhat hypomanic. The long sleepers tended to be anxious, depressed, or withdrawn. The two groups spent an almost identical amount of time -- 75 minutes -- in deep slow-wave sleep stages 3-4, but the long sleepers had twice as much D-time REM-time. It is suggested that there are two separate sleep requirements, a requirement for stage 3-4 sleep which is relatively constant across persons, and a requirement for D-time which is related to the personality and life-style of the individual.
- Anatomy and Physiology