Circadian rhythm sleep disorders related to an abnormal escape of the sleep-wake cycle
Abstract
In 1981 Weitzman and colleagues gave the first description of a new disorder, the delayed sleep phase syndrome (DSPS), after an extensive evaluation of a subgroup of insomniac patients at the Montefiore Hospital Medical Center [115]. They reported delayed sleep patterns in 30 out of 450 insomniac patients (7%) studied between 1976-1979. These patients were younger (33 ±14 y.o.) than the general population of insomniacs (46 ±15 y.o.) and were described as having extreme evening chronotypes. The sleep problems were often present for several years and frequently began during childhood. In 7 of these patients, the disturbed sleep pattern was reported to have started prior to the age of 10, though occurrence at other ages is also possible. In Weitzman’s study, no sex differences were reported although most subsequent accounts have stressed a male predominance of about 10:1. Since then, over 75 cases have been described [3, 29, 90].
Keywords
Sleep Onset Core Body Temperature Multiple Sleep Latency Test Sleep Schedule Exogenous MelatoninPreview
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References
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