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  • Title: Circadian rhythm sleep disorders and phototherapy.
    Author: Fahey CD, Zee PC.
    Journal: Psychiatr Clin North Am; 2006 Dec; 29(4):989-1007; abstract ix. PubMed ID: 17118278.
    Abstract:
    Circadian rhythm sleep disorders are characterized by a desynchronization between the timing of the intrinsic circadian clock and the extrinsic light-dark and social/activity cycles resulting in symptoms of excessive sleepiness and insomnia. This article explores the six recognized circadian rhythm sleep disorders: delayed sleep phase syndrome, advanced sleep phase syndrome, non-24-hour sleep-wake syndrome, irregular sleep-wake pattern, shift work sleep syndrome, and time zone change syndrome. Additionally discussed are the therapeutic roles of synchronizing agents, such as light and melatonin.
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