Clocks in the Wild: Entrainment to Natural Light
Stronger light serves as a stronger cue for circadian timing. If we assume that light information is integrated over time, the duration of light exposure itself can influence the strength of the time cue (called a zeitgeber). Extending this concept, the authors speculate that life in the Arctic Circle experiences weaker entrainment by the light-dark cycle compared to life at the equator.
There are two critical yet open questions to consider. First, Figure 4 suggests that winter is a more challenging season for circadian entrainment in Berlin compared to Taipei. Is there experimental evidence to support this? Second, Figure 7 indicates that the period distribution and the phase of entrainment (i.e., chronotype) exhibit the same skewness. Does this align with the experimentally observed skewness of chronotype in humans?
Circadian Clocks: Mastering Your Body’s Natural Rhythm
Circadian Clocks: Mastering Your Body’s Natural Rhythm
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