Sleeplessness and Circadian Rhythm Disorder
What are circadian rhythm disorders?
A person's circadian rhythm is an internal biological clock that regulates a variety of biological processes according to an approximate 24-hour period. Most of a person's body systems demonstrate circadian variations. The body systems with the most prominent circadian variations are the sleep-wake cycle, the temperature regulation system, and the endocrine system.
The malfunctioning of a person's circadian system, or biological clock, causes circadian rhythm disorders. The circadian rhythm disorder related to the sleep-wake cycle can be categorized into the following 2 main groups:
Medically Reviewed by a Doctor on 6/27/2016
Mary E Cataletto, MD
Gila Hertz, PhD, ABSM
Selim R Benbadis, MD
Mary L Windle, PharmD
Stephen Berman, MD, PhD
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