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Cited by 87Thermoregulation and physiological responsesCircadian rhythm and melatoninCardiovascular and exercise physiology

Circadian variation in peripheral blood flow in relation to core temperature at rest

Smolander, Juhani, H�rm�, Mikko, Lindgvist, Ari, Kolari, Pertti, Laitinen, Lauri A.·1993·European Journal of Applied Physiology and Occupational Physiology
DOI 10.1007/bf00376666
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Abstract

The aim of the present study was to examine the circadian variation in skin blood flow and its relationship to the rhythm of rectal temperature. Eight young men were confined to continuous bed rest for 24 h in a thermoneutral environment. Rectal temperature, oxygen consumption, and peripheral blood flow (laser-Doppler flowmetry and plethysmography) were measured at intervals of 2 h, except at 2400 hours and 0600 hours. According to the cosinor-method, the mean rectal temperature displayed a statistically significant circadian variation with a minimum at 0400 hours. A significant circadian rhythm was also observed in total finger blood flow, finger laser-Doppler flow, and forearm laser-Doppler flow, but not in total forearm blood flow and forehead laser-Doppler flow. The rhythms of rectal temperature and extremity skin blood flow were phased differently, i.e. the decrease in rectal temperature was preceded by an increase in extremity skin blood flow with an average of 4-h time difference. The results would support the idea that circadian rhythm of core temperature is, at least in part, regulated by variation in extremity skin blood flow.

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Crossref · 10.1007/bf00376666

Cites

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  • Changes in thermoregulatory effectors contribute to modification of core body and distal skin temperatures and affect sleep and waking behavior.

    “These changes in thermoregulatory effectors in turn contribute to the modification of core body and distal skin temperatures [4–6] and affect sleep and waking behavior [7,8].”

    From Human thermal perception and time of day: A review (2021) · cites this paper as [4]

  • The maximal value in distal skin temperature is reached shortly before the core body temperature minimum, which is observed around 04:00 in the morning.

    “Furthermore, the maximal value in distal skin temperature is reached shortly before the core body temperature minimum which is observed around 04:00 in the morning [4–6].”

    From Human thermal perception and time of day: A review (2021) · cites this paper as [4]

  • The daily rhythm in core body and skin temperatures is due to circadian variation in heat production and heat loss, in particular the nocturnal increase in heat loss from the extremities leading to increased distal skin temperatures.

    “The daily rhythm in core body and skin temperatures is due to the circadian variation in heat production and heat loss and, in particular, the nocturnal increase in heat loss from the extremities, which leads to an increase in distal skin temperatures [1,4,50].”

    From Human thermal perception and time of day: A review (2021) · cites this paper as [4]

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Authors
Smolander, J., H�rm�, M., Lindgvist, A., Kolari, P., & Laitinen, L. A.
Affiliations
  • Finnish Institute of Occupational Health (FI)
  • Finnish Defence Forces (FI)
Venue
European Journal of Applied Physiology and Occupational Physiology
Publisher
Springer Science and Business Media LLC
Published
1993-08
Volume
67
Issue
2
Pages
192-196
ISSN
  • 0020-9376 (ISSN-L)
  • 0301-5548
  • 1439-6327
DOI
10.1007/bf00376666
OpenAlex
W1966147053
Cited by
87
References
22
Citations by year
2026: 4 · 2025: 5 · 2024: 2 · 2023: 5 · 2022: 1 · 2021: 9 · 2020: 4 · 2019: 4 · 2017: 2 · 2016: 4 · 2015: 1 · 2014: 4 · 2013: 1 · 2012: 2
FWCI
0.87
Type
journal article
Language
en
Open access
closed
Licence
www.springer.com/tdm (tdm)
Locations
  • European Journal of Applied Physiology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Physiology › Thermoregulation and physiological responses
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Health Sciences › Medicine › Complementary and alternative medicine › Cardiovascular and exercise physiology
Keywords
circadian rhythm, skin blood flow, core body temperature, rectal temperature, peripheral blood flow, finger blood flow, forearm blood flow, thermoregulation, bed rest, thermoneutrality, oxygen consumption
MeSH terms
Adult, Blood Pressure, Body Temperature, Circadian Rhythm, Fingers, Forearm, Forehead, Humans, Male, Oxygen Consumption, Plethysmography, Regional Blood Flow, Rest, Skin, Laser-Doppler Flowmetry

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