Cited by 261Sleep and Wakefulness ResearchCircadian rhythm and melatoninSleep and related disorders

The Temperature Dependence of Sleep

Open access
Harding, Edward C., Franks, Nicholas P., Wisden, William·2019·Frontiers in Neuroscience

Abstract

Mammals have evolved a range of behavioural and neurological mechanisms that coordinate cycles of thermoregulation and sleep. Whether diurnal or nocturnal, sleep onset and a reduction in core temperature occur together. Non-rapid eye movement (NREM) sleep episodes are also accompanied by core and brain cooling. Thermoregulatory behaviours, like nest building and curling up, accompany this circadian temperature decline in preparation for sleeping. This could be a matter of simply comfort as animals seek warmth to compensate for lower temperatures. However, in both humans and other mammals, direct skin warming can shorten sleep-latency and promote NREM sleep. We discuss the evidence that body cooling and sleep are more fundamentally connected and that thermoregulatory behaviours, prior to sleep, form warm microclimates that accelerate NREM directly through neuronal circuits. Paradoxically, this warmth might also induce vasodilation and body cooling. In this way, warmth seeking and nesting behaviour might enhance the circadian cycle by activating specific circuits that link NREM initiation to body cooling. We suggest that these circuits explain why NREM onset is most likely when core temperature is at its steepest rate of decline and why transitions to NREM are accompanied by a decrease in brain temperature. This connection may have implications for energy homeostasis and the function of sleep.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.3389/fnins.2019.00336

Cites

159 of 159 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Features of sleep-wake time series can directly capture insomnia-like patterns in sleep related to diabetes mellitus.

    “Similarly, features of sleep-wake time series can directly capture insomnia-like patterns in sleep related to DM6,34,43,44.”

    From Sleep and temperature data from wearable devices support noninvasive detection of diabetes mellitus in a large-scale, retrospective analysis (2026) · cites this paper as [34]

    The Introduction links insomnia to disruption of the body-cooling cycle, but does not discuss diabetes mellitus or features extracted from sleep-wake time series. Searches for diabetes, insomnia, and time series found no passage addressing whether such features capture diabetes-related insomnia-like patterns. (LLM, conf=0.75)

    Experimental — accuracy not yet measured
  • Within a night, the complexity of the distal body temperature time series is related to the autonomic nervous system's health during sleep.

    “Within a night, the complexity of the distal body temperature time series has been related to the autonomic nervous system’s (ANS) health during sleep6,34.”

    From Sleep and temperature data from wearable devices support noninvasive detection of diabetes mellitus in a large-scale, retrospective analysis (2026) · cites this paper as [34]

    The “Warm Bath Effect” section links distal-skin temperature and vasodilation to sleep initiation, but does not discuss the complexity of a within-night temperature time series or its relationship to ANS health. Searches for those specific concepts found no passage addressing the claimed relationship. (LLM, conf=0.74)

    Experimental — accuracy not yet measured
  • Greater DMN-cortical connectivity is associated with better sleep efficiency and total sleep time as measured by polysomnography.

    “Studies suggest associations between DMN connectivity and subsequent sleep quality as measured by polysomnography, with greater DMNcortical connectivity associated with be er sleep efficiency and total sleep time [37].”

    From Pre-Sleep Anxiety: Mechanisms and Therapeutic Approaches in Clinical Practice. (2026) · cites this paper as [37]

    The Introduction and the section ‘Why Link NREM Sleep and Body Cooling?’ discuss temperature, sleep transitions, and neuronal circuits; page numbers are unavailable in our copy. Searches for DMN connectivity, polysomnography, sleep efficiency, and total sleep time found no passage addressing the claimed association. (LLM, conf=0.76)

    Experimental — accuracy not yet measured
  • A hot bath prior to, but not immediately before, the sleep period is known to help with sleep initiation.

    “As a practical example, a hot bath (inducing vasodilation) prior to, but not immediately before the sleep period, is known to help with its initiation [9,52].”

    From Human thermal perception and time of day: A review (2021) · cites this paper as [9]

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Research works printed but not linked: 1

  1. Ma Y. Miracca G. Yu X. Harding E. C. Miao A. Yustos R. (2019). Galanin neurons in the hypothalamus link sleep homeostasis, body temperature and actions of the alpha2 adrenergic agonist dexmedetomidine. bioRxiv 10.1101/565747 · DOI

Cited by

Sorted by citations

Authors
Harding, E. C., Franks, N. P., & Wisden, W.
Affiliations
  • Imperial College London (GB)
  • UK Dementia Research Institute (GB)
Corresponding author
  • Franks, Nicholas P.
  • Wisden, William
Venue
Frontiers in Neuroscience
Published
2019-04-24
Volume
13
Pages
336-336
ISSN
1662-453X (ISSN-L)
OpenAlex
W2940903564
Cited by
261
References
159
Citations by year
2026: 53 · 2025: 48 · 2024: 40 · 2023: 38 · 2022: 30 · 2021: 28 · 2020: 17 · 2019: 7
FWCI
2.60
Type
journal article
Language
en
Open access
Locations
  • Frontiers in Neuroscience (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Spiral (Imperial College London) (submittedVersion, other-oa)
Funders
Wellcome Trust
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Sleep and Wakefulness Research
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and related disorders
Keywords
sleep, thermoregulation, core body temperature, brain cooling, circadian rhythm, behavioral thermoregulation, nest building, skin warming, sleep latency, vasodilation, energy homeostasis, sleep function

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review