Unverified50% confidenceFactExact time
The circadian rhythm is the body's approximately 24-hour physiological timing system, which relies on external environmental cues for continuous calibration, with light being the strongest calibration signal.
1
Sources
50%
Confidence
Long-term
Relevance
10/6/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedMorning light advances the biological clock, while evening light delays it; this time-dependent effect is described by the phase response curve (PRC).73% similarUnverifiedThe circadian rhythm is driven by the master clock located in the suprachiasmatic nucleus (SCN) of the hypothalamus, which is calibrated by light signals received through the retina.72% similar
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