RAPID DECLINE IN BODY-TEMPERATURE BEFORE SLEEP - FLUFFING THE PHYSIOLOGICAL PILLOW
RAPID DECLINE IN BODY-TEMPERATURE BEFORE SLEEP - FLUFFING THE PHYSIOLOGICAL PILLOW
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DOI：
10.3109/07420529409055899
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发表时间：
1994-04-01
影响因子：
2.8
通讯作者：
BROUGHTON, RJ
中科院分区：
文献类型：
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作者：
CAMPBELL, SS;BROUGHTON, RJ
为了进一步阐明夜间体温下降与夜间睡眠开始时间之间的时间关系，采用了一种新的身体核心温度分析方法。研究对象为10名健康老年受试者，他们在实验室居住期间和自行选择的就寝时间和起床时间的核心体温和脑电睡眠记录。然后为每个体温数据集生成变化率曲线，显示在整个记录期内体温从一分钟到另一分钟下降(或增加)的相对幅度。确定最大下降率(MROD)发生的时间，并将该时间与受试者自行选择的就寝时间和随后的脑电定义的睡眠开始时间进行比较。在10名受试者中，有8人的体温曲线在决定退休之前很久(平均41分钟)就出现了最大降幅。入睡后1小时内觉醒次数与上床时间和入睡时间呈显著正相关(r(S)=0.70；p<；0.04)。也就是说，MROD距离就寝时间或睡眠开始时间越近，在睡眠开始后的第一个小时内清醒的情况就越少。研究结果表明，睡眠开始的过程最有可能发生在体温以最大速度下降的时候，并且在体温周期的这个阶段最成功地完成。
A novel approach to the analysis of body core temperature was employed in an effort to further clarify the temporal relationship between the nightly decline in body temperature and the timing of the onset of nocturnal sleep. Core body temperature and EEG sleep recordings were obtained from 10 healthy elderly subjects while they lived in the laboratory and self-selected bedtimes and wake-up times. A rate-of-change curve was then generated for each temperature data set, showing the relative magnitude by which body core temperature declined (or increased) from minute to minute across the recording period. The time at which the maximum rate of decline (MROD) occurred was determined, and this time was compared with subjects' self-selected bedtimes and with subsequent EEG-defined sleep onsets. Eight of the 10 subjects' body temperature curves showed a maximum rate of decline well before (mean 41 min) the decision was made to retire. There was a significant positive correlation between the amount of wakefulness within the first hour after initial sleep onset and MROD relative to both bedtime and sleep onset (r(s) = 0.70; p < 0.04). That is, the closer MROD occurred to either bedtime or sleep onset, the less wakefulness there was within the first hour after sleep onset. The findings indicate that the process of sleep initiation is most likely to occur when body temperature is declining at its maximum rate and is most successfully accomplished at this phase of the temperature cycle.