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Träfflista för sökning "WFRF:(Kecklund G) srt2:(1991-1994)"

Sökning: WFRF:(Kecklund G) > (1991-1994)

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1.
  • Åkerstedt, T, et al. (författare)
  • Manifest sleepiness and the spectral content of the EEG during shift work
  • 1991
  • Ingår i: Sleep. - 0161-8105 .- 1550-9109. ; 14:3, s. 221-225
  • Tidskriftsartikel (refereegranskat)abstract
    • Twenty-five three-shift workers in a process industry were subjected to ambulatory polysomnography during one afternoon and one night shift. The electroencephalographic (EEG) recordings were analyzed with spectral analysis. Subjective sleepiness increased during the night work but did not reach an extreme level. Five subjects fell asleep during night work and the involuntary naps were preceded by a few minutes of increased alpha (8-11.9 Hz) power density. Alpha and theta activity occurred in very short bursts. The hourly mean EEG alpha power density increased significantly but moderately during the night shift and correlated with subjective ratings of sleepiness. Theta power density (4-7.9 Hz) did not increase during the night shift, nor did it correlate with subjective sleepiness. It was suggested that the shift workers could prevent much of the polysomnographic manifestations of sleepiness by various types of activity (including succumbing to sleep). It was also suggested that averaging power density values across long time periods might not be an optimal strategy for detection of sleepiness, but rather some method of emphasizing the occurrence of alpha or theta bursts.
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2.
  • Åkerstedt, T, et al. (författare)
  • Spectral analysis of sleep electroencephalography in rotation three-shift work
  • 1991
  • Ingår i: Scandinavian Journal of Work, Environment & Health. - 0355-3140. ; 17:5, s. 330-336
  • Tidskriftsartikel (refereegranskat)abstract
    • 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.
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  • Resultat 1-2 av 2
Typ av publikation
tidskriftsartikel (2)
Typ av innehåll
refereegranskat (2)
Författare/redaktör
Kecklund, G (2)
Knutsson, Anders (2)
Åkerstedt, T (2)
Lärosäte
Mittuniversitetet (2)
Språk
Engelska (2)
Forskningsämne (UKÄ/SCB)
Medicin och hälsovetenskap (2)
År
1991 (2)

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