, Volume 29, Issue 1, pp 53–64 | Cite as

Seasonal variations in sleep-wake cycle inMicrocebus murinus

  • V. Barre
  • A. Petter-Rousseaux


Seasonal variations in the sleep-wake cycle of four captiveMicrocebus murinus were studied, using electroencephalography. TheMicrocebus were maintained under artificial light which reproduced the day-night cycle at the latitude of Paris, France (49°).

Microcebus spends from three fourths to two thirds of the 24-hr cycle in sleep phase from September to January, whereas sleep phase constitutes only a half of the daily cycle in summer. The REM-S duration is relatively constant throughout the year, although being notably lengthened in September.

Quiet wakefulness constitutes the major part of the time spent awake during the first part of the annual rest season (October to December). These patterns are similar to those seen during the prehibernation state in hibernating mammals.

Key Words

Microcebus Sleep-wake cycle Diurnal rhythm Annual rhythm 


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Copyright information

© Japan Monkey Centre 1988

Authors and Affiliations

  • V. Barre
    • 1
  • A. Petter-Rousseaux
    • 1
  1. 1.C.N.R.S., U.A. 041137, Laboratoire d'Anatomie Comparée, Muséum National d'Histoire NaturelleParisFrance

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