Different laws govern motor activity in sleep than in wakefulness

  • J. J. M. Askenasy
  • M. D. Yahr
Full Papers


A wide range of elementary and complex motor activities are known to occur during sleep, but very little is known about the basic physiologic condition of the skeletal muscle during sleep. The present study provides evidence that a minute electric random activity constitutes the basic physiologic condition of the skeletal muscles during sleep. During the NonREM stages of each sleep cycle a regression of the continuous random minute activity occurs, followed by a sudden increase of the isolated motor unit action potentials during REM sleep. Particular structural features of the anterior tibial (AT) muscle make it the most active skeletal muscle during sleep. During wakefulness, at rest, the random muscle activity disappears.


Anterior tibial muscle electric muscle events isolated motor unit action potentials bursts of motor unit action potentials continuous random NonREM regressive gradient 


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Copyright information

© Springer-Verlag 1990

Authors and Affiliations

  • J. J. M. Askenasy
    • 1
  • M. D. Yahr
    • 2
  1. 1.Sleep Research Institute, Sheba Medical Center, Sackler School of MedicineTel-Aviv UniversityIsrael
  2. 2.Mount Sinai School of MedicineNew York UniversityUSA

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