Pflügers Archiv

, Volume 382, Issue 3, pp 225–231 | Cite as

Thermogenesis and thermolysis during sleeping and waking in the rat

  • Bernard Roussel
  • Jacques Bittel
Heart, Circulation, Respiration and Blood; Environmental and Exercise Physiology


Thermogenesis (VO2), sensible heat loss and subcutaneous back temperature were recorded simultaneously during sleeping and waking in both intact and depilated rats at Ta ranging from 21–28°C.VO2 increased during wakefulness (W), decreased and plateaued during slow wave sleep (SWS) and then decreased 10% with each paradoxical sleep (PS) phase. Sensible heat loss, which represented about 90% of the heat production, increased and plateaued during SWS, decreased in W and generally rose abruptly (+40%) during PS. After removal of the fur the mean levels ofVO2 and sensible heat loss were increased by 30–50% and returned to normal values within two weeks, although their variations related to stages of sleep were unchanged.

These results concerning thermogenesis and thermolysis are in agreement with the variations of body temperature (brain excluded) during sleeping and waking.

Key words

Sleeping and waking Oxygen consumption Thermal exchanges 


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Copyright information

© Springer-Verlag 1979

Authors and Affiliations

  • Bernard Roussel
    • 1
  • Jacques Bittel
    • 1
  1. 1.Division de PhysiologieCentre de Recherches du Service de Santé des ArméesLyonFrance

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