期刊
BIOLOGICAL RHYTHM RESEARCH
卷 53, 期 6, 页码 897-907出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/09291016.2020.1802160
关键词
Ambulatory monitoring; peripheral temperature; sleep stage; timing of sleep
The interaction between the main circadian clock and the homeostatic sleep process forms a time-sensitive window for easy falling asleep in the evening, which is influenced by thermoregulation. Changes in skin and core body temperatures before sleep onset may directly affect sleep regulation. A study found that wrist skin temperatures increased by an average of 0.6 degrees Celsius in the 10 minutes before sleep onset and could be tracked reliably over time.
The interactions of the principal circadian clock with the homeostatic sleep process create the time-sensitive window for easy falling asleep in the evening, which is affected by a thermoregulatory process. It has been hypothesized that the changes in skin and core body temperatures before the sleep onset might play a direct role in sleep regulation. To determine this time window, we recorded from 20 healthy participants (11 women and 9 men), aged 26-58 years, one overnight own-home ambulatory polysomnography and measured continuously wrist skin temperature with a wrist-worn accelerometer containing a skin temperature thermometer. Wrist skin temperatures which were read out from the thermometer of the accelerometers were modeled using linear mixed models, and the linear effect of time before the sleep onset on wrist temperature was analyzed using a mixed model with the sex and age as the covariates. We found that wrist skin temperatures increased on average by 0.6 degrees (of Celcius) in 10 min prior to the sleep onset and could be tracked robustly along a slope of time (p = 0.004). Our current findings may be useful in further characterizing the window of time and its boundaries for easy falling asleep.
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