Circadian Rhythm Directory

Circadian rhythm disorders are disruptions in a person's circadian rhythm -- a name given to the "internal body clock" that regulates the (approximately) 24-hour cycle of biological processes in animals and plants. Circadian rhythms are important in determining human sleeping patterns. When your body clock gets off schedule -- as can occur when traveling, working the night shift, or taking certain medications -- problems may develop that affect sleep. Follow the links below to find WebMD's comprehensive coverage about circadian rhythm disorder, what causes it, how to treat it, and much more.

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