Sleep Propensity Free-Runs with the Temperature, Melatonin and Cortisol Rhythms in a Totally Blind Person | Zendy

Hiroki Nakagawa | Zendy; Robert L. Sack | Zendy; Alfred J. Lewy | Zendy

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Sleep Propensity Free-Runs with the Temperature, Melatonin and Cortisol Rhythms in a Totally Blind Person

Author(s) -

Hiroki Nakagawa,

Robert L. Sack,

Alfred J. Lewy

Publication year - 1992

Publication title -

sleep

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.222

H-Index - 207

eISSN - 1550-9109

pISSN - 0161-8105

DOI - 10.1093/sleep/15.4.330

Subject(s) - melatonin , circadian rhythm , rhythm , dark therapy , psychology , insomnia , sleep (system call) , free running sleep , sleep deprivation , endocrinology , medicine , psychiatry , circadian clock , light effects on circadian rhythm , computer science , operating system

In previous studies, we found that many totally blind people have free-running melatonin rhythms, but that free-running melatonin rhythms were not necessarily associated with periodic insomnia and daytime sleepiness. Thus, it was not clear if the circadian sleep propensity rhythm was free-running with the other circadian rhythms. In the present study, we report that the sleep propensity rhythm (as defined by an ultrashort sleep-wake schedule) free-ran with the melatonin, temperature and cortisol rhythms in a 44-year-old totally blind man even though he maintained a conventional sleep schedule and did not complain of clinically significant insomnia or excessive daytime sleepiness.

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