Open AccessSpectral analysis of sleep electroencephalography in rotating three-shift work.
Author(s) -
T Åkerstedt,
Göran Kecklund,
Anders Knutsson
Publication year - 1991
Publication title -
scandinavian journal of work, environment and health
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.621
H-Index - 103
eISSN - 1795-990X
pISSN - 0355-3140
DOI - 10.5271/sjweh.1694
Subject(s) - morning , sleep (system call) , evening , slow wave sleep , non rapid eye movement sleep , audiology , electroencephalography , sleep spindle , k complex , psychology , sleep stages , sleep deprivation , circadian rhythm , shift work , rapid eye movement sleep , polysomnography , medicine , psychiatry , neuroscience , physics , astronomy , computer science , operating system
Fourteen male rotating three-shift workers were subjected to 24-h ambulatory polysomnographic recording in connection with morning, afternoon, and night shift work (at home and at work). Total sleep time, stage 2, rapid-eye-movement sleep, and slow-wave sleep (stages 3 + 4) were significantly reduced during sleep in connection with the night and morning shifts. Other visually scored sleep parameters and slow-wave energy (spectral power density integrated across sleep) were not affected. The content of the sleep cycles did not differ between shifts. The sleep before the morning shift was characterized by subjectively increased difficulties of sleep initiation and sleep termination, as well as by insufficient recuperation. The night shift was characterized by increased subjective difficulties of maintaining sleep, but also by increased ease of sleep initiation. It was concluded that both morning and evening shifts interfered with sleep, although no effects of sleep deprivation were found.