Sweating responses and body temperatures during nocturnal sleep in humans

Sagot, Jean‐Claude; Amoros, Claire; Candas, Victor; Libert, J. P.

doi:10.1152/ajpregu.1987.252.3.r462

Cited by 45 publications

(33 citation statements)

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“…This depression is commonly ascribed to the fact that thermoregulatory functions are severely inhibited during this sleep state. 21,44 A first hypothesis can nevertheless be proposed that involves interactions occurring between thermoregulatory, circadian and sleep processes. These interactions find expression in the circadian occurrence of Ti level minima and REMS propensity maxima, which are highly coupled at thermoneutrality.…”

Section: Discussionmentioning

confidence: 99%

Effects of a Nocturnal Environment Perceived as Warm on Subsequent Daytime Sleep in Humans

Dewasmes

Telliez

Muzet

2000

Sleep

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BED-TIME present alterations in their nocturnal sleep. Several adverse effects, which are known to reduce the subsequent vigilance level, have been determined, such as partial sleep deprivation and/or sleep fragmentation. Surprisingly, the influence of thermal stressors on subsequent daytime recovery sleep remains unknown, as only one such study has been made, 5 but it did not provide the magnitude of sleep changes. Moreover, the hypnic alterations provoked by thermal stressors may be enhanced by the unusual circadian placement and associated sleep deprivation.In the present study, we analyzed the daytime sleep patterns of individuals kept awake and exposed to a moderate warm stress during the preceding night. Because our interest was focused strictly on the influence of the thermal factor, we controlled the circadian placement and the duration of the diurnal sleep session, and thus also the sleepdeprived state of the volunteers participating in this study. MATERIALS AND METHODSSixteen young male subjects (20-25 years old) gave their informed consent to participate in the study, which had been approved by the local ethics committee. These volunteers were good sleepers, with sleeping habits intermediary between morning and evening types. 28 They had not been exposed and/or naturally adapted to a warm climate during the six months prior to the experiment.The subjects were randomly assigned to two equal independent groups (control and experimental) and were then studied in pairs. One pair was studied per week, with control pairs alternating with experimental pairs. Before starting the recordings, they were habituated to the experimental and sleep (00:00 -08:00) conditions for two successive nights and days. The habituation period was spent in a living room controlled in temperature. During the third night each subject went to an individual climatic (soundproof) chamber adjacent to the living room and was kept awake (23:00 -08:00). A light breakfast was served at 06:00 (<100kcal). Daytime sleep is usually shorter than nighttime sleep. In a previous experiment, thermally comparable to the present control condition, 10 subjects (also awake at night) slept ad lib (from 08:00) an average of 6.2hours (unpublished data). We thus limited the sleep duration in the present study to six hours (light switched off at 08:00). Throughout the experiment, subjects always slept partially Abstract: We studied the influence of a nocturnal environment perceived as warm on the subsequent daytime sleep of healthy human subjects (20-25 years old). From 00:00 to 8:00, they were kept awake and exposed to either a thermoneutral and comfortable (CN) or a warm and uncomfortable (EW) environment, as assessed by the predicted mean vote/percentage of persons dissatisfied questionnaire (PMV/PPD). The subjects then slept from 8:00 to 14:00 in a thermoneutral environment. Sleep was scored according to the Rechtschaffen and Kales criteria. Rectal temperature was recorded from 22:00 to the end of the sleep period. Compared to CN, a significant but mod...

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Section: Discussionmentioning

confidence: 99%

Effects of a Nocturnal Environment Perceived as Warm on Subsequent Daytime Sleep in Humans

Dewasmes

Telliez

Muzet

2000

Sleep

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“…NREM sleep is characterized by postural and motor quiescence, functional prevalence of the parasympathetic over the sympathetic activity, lowering of metabolic heat production (decrease in muscle tone and heart and breathing rates) and brain and body temperatures (vasodilation of heat exchangers, sweating) [28,29]. Thus, a moderately warm ambient temperature or a slight increase in core temperature promotes sleep: in this case, the onset of sleep is a synergic concomitant of thermoregulation in adaptation to the positive thermal load [12].…”

Section: Resultsmentioning

confidence: 99%

Influence of the Temperature Signal on Sleep in Mammals

Parmeggiani

2000

Neurosignals

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“…The active mc, changes were calculated minute by minute for each subject as reported elsewhere (Amoros et ul. 1986;Sagot et al 1987;Dewasmes et al 1994). A total inhibition of active sweating was assumed when mcs fell to 0.01 mg.min.…”

Section: Methodsmentioning

confidence: 99%

“…1977) or locally (Sagot 1987;Sagot et al 1987;Dewasmes et 01. 1994), sweating response depression also anticipates PS occurrence in humans.…”

Section: Changes In Sweating Levels Before Ps Occurrence (Pre-ps Period)mentioning

confidence: 99%

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A short‐term poikilothermic period occurs just after paradoxical sleep onset in humans: characterization changes in sweating effector activity

Dewasmes

Bothorel

Candas

et al. 1997

Journal of Sleep Research

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SUMMARYWe examined the changes in sudorific effector activity in five healthy young (21 -23 y) subjects just before, during and just after successive paradoxical sleep (PS) phases. Local sweat rates were evaluated minute by minute over the chest (mcs). Previous observations, showing that mLs levels dropped before paradoxical sleep onset was electrophysiologically scored, were confirmed. At the end of this period of m,, depression, which in the present study coincided with paradoxical sleep onset, we show for the first time a short period (3-7min) (period I) during which sweat production completely disappeared. A second period then followed (period II), at the very beginning of which mcs was re-elicited and thereafter increased in close correlation with paradoxical sleep duration. During period 11, the remaining inhibiting influences (maximal during period I) and their releases could be specified by the successive valleys (indicating mch inhibition) and peaks (indicating release of the mc5 inhibition) drawn by the minute by minute mc, changes. These inhibitions became weaker as paradoxical sleep advanced. Given the strategic position of period I (at paradoxical sleep onset) and the total m,, abolition therein observed, it may be assumed that this poikilothermic state is the re-emergence of the 'ancestral' mode of body temperature regulation. From a thermophysiological point of view, period I1 may be considered as more 'modern' and directly related to the extension of paradoxical sleep in humans. This extension could be underlain by the unique development of our cognitive and/ or learning functions.

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Sweating responses and body temperatures during nocturnal sleep in humans

Cited by 45 publications

References 0 publications

Effects of a Nocturnal Environment Perceived as Warm on Subsequent Daytime Sleep in Humans

Effects of a Nocturnal Environment Perceived as Warm on Subsequent Daytime Sleep in Humans

Influence of the Temperature Signal on Sleep in Mammals

A short‐term poikilothermic period occurs just after paradoxical sleep onset in humans: characterization changes in sweating effector activity

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