Circadian effects of light no brighter than moonlight.

@article{Evans2007CircadianEO,
  title={Circadian effects of light no brighter than moonlight.},
  author={Jennifer A Evans and Jeffrey Elliott and Michael R. Gorman},
  journal={Journal of biological rhythms},
  year={2007},
  volume={22 4},
  pages={356-67}
}
In mammals, light entrains endogenous circadian pacemakers by inducing daily phase shifts via a photoreceptor mechanism recently discovered in retinal ganglion cells. Light that is comparable in intensity to moonlight is generally ineffective at inducing phase shifts or suppressing melatonin secretion, which has prompted the view that circadian photic sensitivity has been titrated so that the central pacemaker is unaffected by natural nighttime illumination. However, the authors have shown in… CONTINUE READING

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