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Circadian rhythm sleep disorders: An update

Research paper by Bhavneesh Sharma, Steven Feinsilver

Indexed on: 05 May '09Published on: 05 May '09Published in: Sleep and Biological Rhythms



Abstract

The primary symptom of circadian rhythm sleep disorders (CRSDs) is the inability to sleep during the desired sleep time. CRSDs are divided into two broad classes: (i) disorders not related to forced alterations of the sleep-wake schedule or light-dark cycle (including advanced sleep phase disorder [ASPD], delayed sleep phase disorder [DSPD], non-entrained type [NET], and irregular sleep-wake rhythm [ISWR]); and (ii) disorders related to forced alterations of the sleep-wake schedule or light-dark cycle (including shift work sleep disorder [SWSD], jet lag disorder [JLD], and CRSDs related to diseases and medications). DSPD and ASPD are the common primary circadian rhythm disorders. We discuss the recent developments in the pathogenesis, diagnosis, and management of CRSDs.