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Article: Circadian rhythm sleep disorder
- Article from:
- Gale Encyclopedia of Mental Disorders
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Circadian rhythm sleep disorder
Definition
Circadian rhythm sleep disorder is a persistent or recurring pattern of sleep disruption resulting either from an altered sleep-wake schedule or an inequality between a person's natural sleep-wake cycle and the sleep-related demands placed on him or her. The term circadian rhythm refers to a person's internal sleep and wake-related rhythms that occur throughout a 24-hour period. The sleep disruption leads to
insomnia
or excessive sleepiness during the day, resulting in impaired functioning.
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