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Time-related Changes in Sleep-Wake Pattern as Correlates of Controlled Shift Work Rotating Directions

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Authors
Kim, Hyun-Sook; Jeong, Do-Un
Issue Date
1993-12
Publisher
Seoul National University College of Medicine
Citation
Seoul J Med, Vol.34 No.4, pp. 301-309
Keywords
Shift workCounterclockwise rotationClockwise rotationRise timeRetire timeTotal sleep time
Abstract
In order to elaborate the sleep-wake pattern changes manifested during
controlled shift working of counterclockwise and clockwise rotations, eleven subjects
were studied. A baseline sleep survey during uncontrolled shift working using a sleep
questionnaire revealed that day and night shifts were found to have less total sleep
time compared with evening and off duties, with delayed retire time in the evening
shifts and advanced rise time in the day shifts. In analyses of data from controlled shift
work schedules of opposite directions, difference in rise time appeared to be a crucial
factor determining the total sleep time. This finding is compatible with the theory that
rise time is one of the most powerful factors in resetting the biological clock. Retire
time seemed to be determined more by the subjects' sleep habits and/or the socioenvironmental
stimuli. Off-duty allocation was found to be an important variable in
sleep-wake pattern modulation in shift working.
ISSN
0582-6802
Language
English
URI
https://hdl.handle.net/10371/5543
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College of Medicine/School of Medicine (의과대학/대학원)Dept. of Medicine (의학과)The Seoul Journal of MedicineThe Seoul Journal of Medicine Vol. 34 No.4 (1993)
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