不眠と疲労
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概要
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There are usually many experiences that the sleep is very important to recover the fatigue. In recent times, various industries are developing more and more which maintain 24 hours operation. As a result, workers having more chances to work at night. The investigation about the relation between fatigue and the insufficient sleep was experimentally designed. The flicker test was done on office work and the flicker value was found to be declined in the next morning after all-night working. In a petroleum manufacturing factory, the flicker value declined most severely at work of nightshift, in comparison with day-shift and evening-shift, and the decline of flicker value became more severe day by day. These facts mean that the insufficient sleep influences the brain functions making to decline its the level. And the variations of flicker value by insufficient sleep should be considered on the basis of physiological diurnal fluctuation of functions, that is to say 24 hours rhythm. The investigation was planned as follows (I) subjects: 5 students, (2) duration of sleep: 2,4,6, and 8 hours, (3) time to go to bed: 22:00 o'clock, (4) functions tested: sublingual temperature, pulse rate, flicker value, and subjective drowsiness, (5) follow up after awake until evening. Ranking of the levels of function at 8:00 to 10:00 o'clock after various duration of sleep showed that after 0 or 2 hours' sleep the level is lower compared with 4,6, or 8 hours' sleep and that the ascending of the sublingual temperature after meal is higher with sufficient sleep. Further results could be summarized as follows: (1) With insufficient sleep, ascending of functions is the next morining is disturbed, and descending of functions continues until next evening. (2) If dietetic descending of sublingual temperature is detectable, it means descending of replacement. (3) Subjective drowsiness on the next day means the semisleeping condition. (4) This semisleeping condition is a situation of insufficient efficiency and sleeping. (5) This situation is fatiugue that is carried over to the next day. This condition means of insufficient changing of the higher level of functions at daytime to the lower at night.
- 社団法人日本産業衛生学会の論文