Entrainment of the Human Circadian System by Light

@article{Duffy2005EntrainmentOT,
  title={Entrainment of the Human Circadian System by Light},
  author={J. F. Duffy and K. Wright},
  journal={Journal of Biological Rhythms},
  year={2005},
  volume={20},
  pages={326 - 338}
}
The periodic light-dark cycle is the dominant environmental synchronizer used by humans to entrain to the geophysical 24-h day. Entrainment is a fundamental property of circadian systems by which the period of the internal clock (τ) is synchronized to the period of the entraining stimuli (T cycle). An important aspect of entrainment in humans is the maintenance of an appropriate phase relationship between the circadian system, the timing of sleep and wakefulness, and environmental time (a.k.a… Expand
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