non 24 sleep disorder

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non 24 sleep disorder2016-11-11T12:42:36+00:00

non 24 sleep disorder

SLEEP DISORDERS

Definition A chronic circadian rhythm sleep disorder, defined* as insomnia or excessive sleepiness related to abnormal synchronisation between the 24-hour light–dark cycle and the endogenous circadian rhythms of sleep and wake propensity

*In the International Classification of Sleep Disorders Diagnostic and Coding Manual

Comment Most individuals with non-24 are blind, and become symptomatic when their non-entrained (free-running) endogenous circadian rhythm (clock) drifts out of alignment with a desired or conventional sleep–wake schedule. Non-24 disorder debilitates because it is incompatible with most social and professional obligations. It can also occur in sighted people; nobody knows why.

Synonyms Circadian rhythm sleep disorder—free-running type, circadian rhythm sleep disorder—nonentrained type, free running disorder, hypernychthemeral disorder, non 24, non-24-hour circadian rhythm disorder, non-24-hour sleep–wake disorder

Reference http://en.wikipedia.org/wiki/Non-24-hour_sleep%E2%80%93wake_disorder

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