COMPARISON BETWEEN AUTORHYTHMOMETRIC METHODS AND A BASELINE MEASUREMENT OF CIRCADIAN RHYTHMS IN NIGHT-WORKERS
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概要
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Usually, the control of circadian functions in subjects who continue active behavior is rather complicated by so-called masking effects arising from reactive changes of the respective functions to the individual activity cycle, meal cycle, etc. In order to minimize those disturbing masking effects, 8 subjects were controlled in a special climatized and noise-protected chamber where they remained on bedrest for 24 hr, receiving a low-protein diet and sleeping at their convenience. The results were compared with autorhythmometric measurements taken from identical subjects performing certain activity schedules one day before or after the chamber control. All investigations were done within a period of 3 weeks of continuous night work and another 3 weeks of day work. The results show drastic differences in rectal temperature and heart rate between both methods of circadian rhythm control. It is concluded that masking effects play an important role in the hitherto contradictory evaluation of circadian adaptation to night and shift work. Differences in speed and quality of adaption were found between so-called morning and evening types by means of baseline measurement.
- 人類働態学会の論文
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