Sleep research can be divided into two eras around the work of Aserinsky and Kleitman (1953, 1955), and Dement and Kleitman (1957), who discovered rapid eye movement during sleep, now referred to as REM sleep, which revitalized research in this area.


Sleep Stage Sleep Onset Sleep Latency Total Sleep Time Sleep Efficiency 
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Copyright information

© Springer Science+Business Media New York 1991

Authors and Affiliations

  • Warren W. Tryon
    • 1
  1. 1.Fordham UniversityBronxUSA

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