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Circadian Rhythms

Circadian rhythms are the 24-hour cycles of physical and mental changes that are driven by your body's "biological clock." They are influenced both by things inside your body and by things in your environment, especially light. Your circadian rhythms affect your sleep-wake cycle, your body temperature, and other important body functions.

ByHealthwise Staff
Primary Medical ReviewerKathleen Romito, MD - Family Medicine
Specialist Medical ReviewerAlfred Lewy, MD, PhD - Psychiatry
Last RevisedMarch 14, 2013

WebMD Medical Reference from Healthwise

Last Updated: March 14, 2013
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