Circadian rhythm sleep disorders.

Mar 24, 2010The Indian journal of medical research

Sleep problems linked to disrupted body clock rhythms

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Abstract

Circadian rhythm sleep disorders are common, particularly affecting adolescents and the elderly.

Delayed sleep phase is typical in adolescents, while advanced sleep phase is frequent in the elderly.
Nine possible diagnoses of circadian rhythm sleep disorders are of clinical interest.
Individuals who are blind or work night/rotating shifts may be more susceptible to these disorders.
Light serves as the main cue for synchronizing the biological clock.

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Circadian rhythm sleep disorders are common conditions manifested as misalignment between the sleep period and the physical/social 24-h environmental cycle. Delayed sleep phase (typical in adolescents) and advanced sleep phase (frequent in the elderly), situations in which the sleep period is displaced to a later or earlier time, respectively, are the two most prevalent circadian rhythm sleep disorders. There are, however, nine possible diagnoses of clinical interest. Since light is the main cue used in synchronizing the biological clock, blind individuals and night-shift/rotating-shift workers are more prone to develop circadian rhythm sleep disorders. In this article, the circadian rhythm syndromes included in the new International Classification of Sleep Disorders are reviewed as well as the most recent guidelines for diagnosis and treatment.

Circadian rhythm sleep disorders.

Abstract

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