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Cited by 32Sleep and Wakefulness ResearchSleep and related disordersSleep and Work-Related Fatigue

Effects of Body Heating During Sleep Interruption

Bunnell, David E., Horvath, Steven M.·1985·Sleep
DOI 10.1093/sleep/8.3.274
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Abstract

This study assessed the effects that elevating body temperature had on sleep structure in the third and fourth sleep cycles, cycles typically characterized by a high propensity for REM sleep and diminished levels of delta amplitude and incidence. The sleep of eight women and two men was interrupted for 30 min on each of 3 consecutive nights following an undisturbed adaptation night. The subjects were awakened each night following the end of the second REM sleep period. On 2 nights, subjects were immersed to midthorax in water at either 34 degrees C (TW condition) or 41 degrees C (HW condition) for 20 min. A third interruption without immersion (NW condition) was performed to provide a second type of baseline condition. The HW condition induced a mean tympanic temperature rise of 2.5 degrees C, that returned to baseline levels in approximately 60 min. Analysis of sleep patterns focused on the two sleep cycles following interruption. The mean of the two baseline conditions (TW + NW/2) was compared with the HW condition. Sleep onset latency, REM latency, REM duration, and eye movement activity in REM were unaffected by heating. Heating evoked increases in both total NREM and slow wave sleep, though these increases were delayed until the second cycle following sleep onset (i.e., appearing in the fourth, but not the third, NREM period). These were paralleled by increases in two objective measures of delta activity: integrated slow-wave amplitude (33% increase) and slow-wave density (10% increase).

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Crossref · 10.1093/sleep/8.3.274

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  • This sleep enhancement seems to occur mostly when the heat stress is annihilated, i.e., core temperature is no longer elevated, while skin temperature is still somewhat increased due to the overshoot in heat dissipation.

    “It is important to note that this sleep enhancement seems to occur mostly when the heat stress is annihilated, i.e., core temperature is no longer elevated, while skin temperature is still somewhat increased due to the overshoot in heat dissipation [10, 11, 20, 23–25, 40, 41, 44, 45, 76].”

    From Sleep, vigilance, and thermosensitivity (2012) · cites this paper as [11]

  • Body heating activates heat dissipation for a duration that outlasts the heat stress, and consequently may keep skin blood flow higher for a few hours.

    “Body heating activates heat dissipation for a duration that outlasts the heat stress, and consequently may keep skin blood flow higher for a few hours.”

    From Sleep, vigilance, and thermosensitivity (2012) · cites this paper as [11]

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Research works printed but not linked: 2

  1. Maloletnev VI, Chachanaschvilli MG. Changes in sleep structure after rapid weight reduction in steam bath. Bull Acad Sci Georg SSR 1979;96:690-2.
  2. Hartmann EL. The functions of sleep. New Haven: Yale University Press, 1979;106-11.

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Authors
Bunnell, D. E., & Horvath, S. M.
Affiliations
University of California, Santa Barbara (US)
Corresponding author
Bunnell, David E.
ORCID
Bunnell, David E.
Venue
Sleep
Publisher
Oxford University Press (OUP)
Published
1985-09
Volume
8
Issue
3
Pages
274-282
ISSN
  • 0161-8105 (ISSN-L)
  • 1550-9109
DOI
10.1093/sleep/8.3.274
OpenAlex
W2418155292
Cited by
32
References
18
Citations by year
2018: 1 · 2013: 2
FWCI
0.82
Type
journal article
Language
en
Open access
closed
Locations
  • SLEEP (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Sleep and Wakefulness Research
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and related disorders
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and Work-Related Fatigue
Keywords
body heating, sleep disruption, REM sleep, slow-wave sleep, NREM sleep, delta oscillations, sleep architecture, water immersion, tympanic temperature, eye movements, sleep latency
MeSH terms
Adult, Body Temperature, Circadian Rhythm, Eye Movements, Female, Hot Temperature, Humans, Male, Reaction Time, Sleep, Sleep, REM

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