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Perturbations of Next-Period Functions: Applications to Circadian Rhythms

Conference paper
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Part of the Springer Series in Synergetics book series (SSSYN, volume 39)

Abstract

A circadian rhythm is an oscillation within a living organism with a period of about 24 hours. When the organism is kept isolated under constant conditions the circadian oscillator works with its own free-running period. When the organism is exposed to physical clues of the time of day the circadian rhythm is gradually entrained and assumes a precise 24 hour period. If the entraining stimuli are withdrawn, the circadian oscillator reverts gradually to its free-running period. A single stimulus under otherwise constant conditions elicits a transient of gradually changing period. A phase shift of an entraining oscillation is followed by a gradual synchronization to the new phase [1,2].

Keywords

Phase Shift Circadian Rhythm Phase Response Period Doubling Bifurcation Circadian Oscillator 
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.

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References

  1. 1.
    E. Bünning: The Physiological Clock, (Springer, New York 1973)Google Scholar
  2. 2.
    J. Aschoff (editor): Biological Rhythms, Handbook of Behavioral Neurobiology, Vol. 4, (Plenum, New York 1981)Google Scholar
  3. 3.
    H. Degn: In Chemical Applications of Topology and Graph Theory, ed. by R.B. King, (Elsevier 1983)Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1988

Authors and Affiliations

  • H. Degn
    • 1
  1. 1.Institute of BiochemistryOdense UniversityOdense MDenmark

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