Body temperature and sleep.
Level 5 - mechanism / opinion, no new human data
Narrative review synthesizing physiological and mechanistic pathways with no new human trial or empirical data
PubMed 30454599 · doi:10.1016/B978-0-444-63912-7.00020-5
What was done
This narrative review summarizes mammalian and human physiological literature on the coupling between circadian rhythms, sleep-wake states, and body temperature regulation, highlighting autonomic, thermoeffector, and hypothalamic pathways.
What was found
The abstract reports no numerical data or effect sizes. It describes established physiological mechanisms: core body temperature decreases during sleep due to behavioral quiescence, reduced muscle tone, and autonomic changes; peripheral vasodilation leads to increased distal skin temperature facilitating heat loss at sleep onset; thermoregulatory defense mechanisms differ between NREM and REM sleep; and warm-sensitive neurons in the preoptic/anterior hypothalamus exhibit spontaneous activation during sleep onset and NREM sleep compared with wakefulness.
Why it matters
It outlines the neurobiological and autonomic architecture integrating sleep regulation with thermoregulatory control, explaining the physiology of distal heat shedding during sleep onset.
Limits
As a narrative review, it presents no original empirical data, quantitative metrics, or systematic search methodology. Specific human sample characteristics, environmental conditions, and clinical implications are not detailed in the abstract.
Cited by
- supports In order to fall asleep and stay deeply asleep, human core body temperature must decrease by approximately 1 to 3 degrees Fahrenheit.
- supports In order to fall asleep and stay deeply asleep, core body temperature must decrease by about 1 to 3 degrees, and must increase by about 1 to 3 degrees to wake up feeling refreshed.