In chronobiology, entrainment of a circadian system is the alignment of its own period and phase to the period and phase of an external rhythm. A common example is the entrainment of endogenous circadian rhythms (which, in mammals, are generated by the suprachiasmatic nuclei of the hypothalamus) to the daily light-dark cycle. Of the several possible cues, called zeitgeber (German for time-giver, synchronizer), which can contribute to entrainment, bright light is by far the most effective.
Entrainment is accomplished by altering the concentration of clock components, adjusting gene expression and protein stability.[1]
References
- ^ Toh, Kong Leong (August 2008). "Basic Science Review on Circadian Rhythm Biology and Circadian Sleep Disorders" (Review, Full Text, PDF). Annals Academy Med Singapore 37 (8): 662–8. http://www.annals.edu.sg/PDF/37VolNo8Aug2008/V37N8p662.pdf. Retrieved 2009-08-15.
References
- Pittendrigh CS (1981) Circadian systems: Entrainment. In Handbook Behavioral Neurobiology, Vol. 4. Biological Rhythms, J. Aschoff, ed. pp. 239-68, University of California Press, New-York.
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