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Temporal Order pp 279-280 | Cite as

Interaction between Two Circadian Clocks in the Rabbit and Their Main Input

  • A. C. Bobbert
  • D. J. Bruinvels
Conference paper
Part of the Springer Series in Synergetics book series (SSSYN, volume 29)

Abstract

It was previously shown [review in 1] for the rabbit that photosensitivity of the visual system fluctuates according to a block-shaped circadian rhythm. The time courses of this rhythm after exposure to 24 hrs light-dark alternations or to constant environmental circumstances strongly suggest that this rhythm is governed by a central circadian mechanism with the properties of a double-oscillator. These 2 oscillators may correspond with the Morning- and Evening type oscillators which have been described for hamsters and other rodents [2,3]. This raised the following questions: — does the rabbit show corresponding circadian changes in food intake? If so, is there any indication that this rhythm also is controlled by a double-oscillator? And, in case of the latter, how do these separate oscillators respond to entrainment by light-dark regimens or to constant photic circumstances?

Keywords

Circadian Clock Neural Oscillator Type Oscillator Circadian Pacemaker Circadian Change 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. 1.
    A.C. Bobbert and J. Brandenburg: “Characteristics of the Interaction Between the Central Circadian Mechanism and the Retina in Rabbits”. In Vertebrate Circadian Systems. Ed. by J. Aschoff, S. Daan and G. Groos. Springer Verlag Berlin-Heidelberg-New York, 52–61 (1982)Google Scholar
  2. 2.
    S. Daan and C. Berde: “Two Coupled Oscillators: Simulations of the Circadian Pacemaker in Mammalian Activity Rhythms”. J. Theor. Biol, 70, 297–313 (1978)CrossRefMathSciNetGoogle Scholar
  3. 3.
    M. Kawato and R. Suziki: “Two Coupled Neural Oscillators as a Model of the Circadian Pacemaker”. J. Theor. Biol., 86, 547–575 (1980)CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1985

Authors and Affiliations

  • A. C. Bobbert
    • 1
  • D. J. Bruinvels
    • 1
  1. 1.Department of Physiology and Physiological PhysicsUniversity of LeidenLeidenThe Netherlands

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