Psychophysiological studies for influences of timing and interruption of sleep on body temperature rhythm.

本研究探讨了睡眠/觉醒时间对直肠温度昼夜节律的影响。本研究进行了两个实验：(1)在第二个睡眠周期或第四个睡眠周期中，不同的觉醒时长中断夜间睡眠。我们观察了它们对夜间体温和体温低谷位置的影响。结果表明：(1)在第二个睡眠周期或第四个睡眠周期中，不同的觉醒时间被不同的觉醒时间所干扰。睡眠中断后恢复睡眠时，体温迅速下降，与第一次入睡时一样。第二个睡眠周期和第四个睡眠周期中断后，体温急剧下降。中断之夜的体温节律往往比未中断之夜(基线之夜)出现得更早。当中断时间设置为40-60分钟时，观察到中断对体温的影响。(2)在昼夜节律的不同阶段引入8小时的睡眠。00：00~80：00，05：00~13：00 11：00~19：00，16：00~24：00，均按常规进行，观察睡眠对随后24小时无睡眠的体温节律峰期、波幅和波幅的影响。

This study investigated the influences of timing of sleep/wake on circadian rhythm of rectal temperature.Two experiments were performed in this study.(1) Nocturnal sleep was interrupted by various length of wakefulness in the second sleep cycle or theforth sleep cycle.We observed the influences on nocturnal body temperature and on the position of trough of body temperature.As the results, body temperature decreased repidly at the returning to sleep after sleep onterruption as same as at the first sleep inset.This steep fall of body temperature was observed after the interruption of both the second sleep cycle and the fourth sleep cycle.Trough of body temperature rhythm on the interrupted night tended to appear earlier than the uninterrupted night (baseline night).These dffects of interruption on body temperature were observed when the interruption length was set to 40-60 min.(2) Eight-hours of sleep were introduced to various phase of circadian body temperature rhythm.That is four kinds of phase ; 00 : 00-80 : 00,05 : 00-13 : 00 11 : 00-19 : 00,16 : 00-24 : 00.All the four conditions were under constant routine.And we observed the influence of the sleep on the acrophase, amplitude, and mesor of body temperature rhythm during the subsequent 24 hour without sleep.