Influence of the Temperature Signal on Sleep in Mammals

Parmeggiani, Pier Luigi

doi:10.1159/000014651

Cited by 10 publications

(5 citation statements)

References 26 publications

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“…This would suggest that there is a threshold of temperature beyond which sleep is either drastically reduced or altogether eliminated. This is supported by several studies (e.g., [70][71][72]), which found that alterations of ambient temperature tend to affect the timing and periodicity of sleep, while altering temperature far outside the thermal neutral zone can affect sleep duration as well. A study in bats found that when ambient temperatures exceeded 35 • C, no sleep was observed [73].…”

Section: Lights-offsupporting

confidence: 53%

The Effects of Commercially-Relevant Disturbances on Sleep Behaviour in Laying Hens

Putyora,

Brocklehurst,

Sandilands

2023

Animals

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Ensuring the welfare of commercially kept animals is a legal and ethical responsibility. Sleep behaviour can be sensitive to environmental perturbations and may be useful in assessing welfare state. The objective of this study was to use behavioural and electrophysiological (EEG) measures to observe the effects of 24 h stressors followed by periods of no stressors on laying hen sleep behaviour, and to investigate the use of sleep behaviour as a means of welfare assessment in commercial poultry. Ten laying hens surgically implanted with EEG devices to record their brain activity over four batches were used. Hens were subjected to undisturbed, disturbed and recovery periods for 24 h. Disturbed periods consisted of either feed deprivation, increased ambient temperature (28 °C) or simulated footpad pain via injection of Freund’s adjuvant into the footpad. Sleep state was scored using behaviour data from infrared cameras and EEG data. Over all periods, hens engaged in both SWS (average 60%) and REM sleep (average 12%) during the lights-off period. Feed deprivation and footpad pain had little to no effect on sleep states, while increased ambient temperature significantly reduced REM sleep (to near elimination, p < 0.001) and SWS (p = 0.017). During the lights-on period, footpad pain increased the proportion of time spent resting (p = 0.008) and in SWS (p < 0.001), with feed deprivation or increased ambient temperature (p > 0.05) having no effect. Increasing ambient temperatures are likely to affect sleep and welfare in commercially-kept laying hens in the face of global climate change.

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Section: Lights-offsupporting

confidence: 53%

The Effects of Commercially-Relevant Disturbances on Sleep Behaviour in Laying Hens

Putyora,

Brocklehurst,

Sandilands

2023

Animals

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“…Both animal and human studies have demonstrated disturbed sleep with thermal manipulations that activate heat or cold stress mechanisms (20,40). Thus, beyond the physiological range that we applied, a further increase in skin temperature is likely to disturb sleep-onset mechanisms rather than facilitate it at some point.…”

Section: Discussionmentioning

confidence: 94%

Cutaneous warming promotes sleep onset

Raymann

Swaab²,

Someren³

2005

American Journal of Physiology-Regulatory, Integrative and Comp

147

136

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Sleep occurs in close relation to changes in body temperature. Both the monophasic sleep period in humans and the polyphasic sleep periods in rodents tend to be initiated when core body temperature is declining. This decline is mainly due to an increase in skin blood flow and consequently skin warming and heat loss. We have proposed that these intrinsically occurring changes in core and skin temperatures could modulate neuronal activity in sleep-regulating brain areas (Van Someren EJW, Chronobiol Int 17: 313-54, 2000). We here provide results compatible with this hypothesis. We obtained 144 sleep-onset latencies while directly manipulating core and skin temperatures within the comfortable range in eight healthy subjects under controlled conditions. The induction of a proximal skin temperature difference of only 0.78 +/- 0.03 degrees C (mean +/- SE) around a mean of 35.13 +/- 0.11 degrees C changed sleep-onset latency by 26%, i.e., by 3.09 minutes [95% confidence interval (CI), 1.91 to 4.28] around a mean of 11.85 min (CI, 9.74 to 14.41), with faster sleep onsets when the proximal skin was warmed. The reduction in sleep-onset latency occurred despite a small but significant decrease in subjective comfort during proximal skin warming. The induction of changes in core temperature (delta = 0.20 +/- 0.02 degrees C) and distal skin temperature (delta = 0.74 +/- 0.05 degrees C) were ineffective. Previous studies have demonstrated correlations between skin temperature and sleep-onset latency. Also, sleep disruption by ambient temperatures that activate thermoregulatory defense mechanisms has been shown. The present study is the first to experimentally demonstrate a causal contribution to sleep-onset latency of skin temperature manipulations within the normal nocturnal fluctuation range. Circadian and sleep-appetitive behavior-induced variations in skin temperature might act as an input signal to sleep-regulating systems.

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“…En los análisis post hoc, solamente la fase N3 tuvo diferencias significativas con las otras fases de sueño en ambos ciclos NMOR-MOR, lo que sugiere que esta fase contribuye con la diferenciación de la respuesta termorreguladora. Además, durante el sueño MOR la regulación de la temperatura está ausente, 22,24,25 con tal ausencia de los mecanismos reguladores de la temperatura los mamíferos se comportarían como animales poiquilotermos. 26 Sin embargo, los estudios que sustentan la falta de regulación de la temperatura en el sueño MOR se han realizado principalmente en mamíferos no humanos.…”

Section: Discussionunclassified

Evaluación de la actividad termorreguladora y cardiovascular durante el sueño

Salgado

Ayala‐Guerrero

2022

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La actividad termorreguladora y cardiovascular presentan ritmicidad circadiana asociada con el ciclo vigilia-sueño. El uso de la polisomnografía (PSG) ha facilitado el estudio de la temperatura corporal y actividad cardiovascular tanto durante el sueño con movimientos oculares rápidos (MOR) como del sueño sin MOR (NMOR). Sin embargo, existen pocos estudios que han evaluado la temperatura corporal y actividad cardiovascular a lo largo de los ciclos NMOR-MOR. El objetivo de este estudio fue evaluar las características de la temperatura periférica y variabilidad de la frecuencia cardiaca durante los ciclos NMOR-MOR. Se realizaron estudios de PSG en 15 participantes sanos donde se analizaron la temperatura periférica, la arritmia sinusal respiratoria (ASR) y la frecuencia baja (FB). Los análisis estadísticos muestran que en la temperatura periférica hubo diferencias significativas entre las diferentes fases de sueño, mientras que los valores de la ASR y la FB variaron significativamente tanto entre las diferentes fases de sueño como entre los ciclos NMOR-MOR. Se ha descrito que la respuesta termorreguladora es diferente entre el sueño NMOR y MOR, en este estudio se observaron diferencias significativas en la temperatura periférica entre las fases de sueño N2, N3 y MOR. Estos resultados resaltan diferencias en los mecanismos reguladores de la temperatura y de la actividad cardiovascular cuando se considera la ciclicidad del sueño NMOR y MOR.

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Influence of the Temperature Signal on Sleep in Mammals

Abstract: The influence of the temperature signal on sleep may be considered physiologically specific if it entails thermoreceptor activation. Experimental evidence shows that sleep time peaks at neutral ambient temperature.

Cited by 10 publications

References 26 publications

The Effects of Commercially-Relevant Disturbances on Sleep Behaviour in Laying Hens

The Effects of Commercially-Relevant Disturbances on Sleep Behaviour in Laying Hens

Cutaneous warming promotes sleep onset

Evaluación de la actividad termorreguladora y cardiovascular durante el sueño

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