Combined facial heating and inhalation of hot air do not alter thermoeffector responses in humans

Jonathan E. Wingo, David A. Low, David M. Keller, Kenichi Kimura, Craig G. Crandall

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The influence of thermoreceptors in human facial skin on thermoeffector responses is equivocal; furthermore, the presence of thermoreceptors in the respiratory tract and their involvement in thermal homeostasis has not been elucidated. This study tested the hypothesis that hot air directed on the face and inhaled during whole body passive heat stress elicits an earlier onset and greater sensitivity of cutaneous vasodilation and sweating than that directed on an equal skin surface area away from the face. Six men and two women completed two trials separated by ~1 wk. Participants were passively heated (waterperfused suit; core temperature increase ~0.9°C) while hot air was directed on either the face or on the lower leg (counterbalanced). Skin blood flux (laser-Doppler flowmetry) and local sweat rate (capacitance hygrometry) were measured at the chest and one forearm. During hot-air heating, local temperatures of the cheek and leg were 38.4± 0.8°C and 38.8± 0.6°C, respectively (P = 0.18). Breathing hot air combined with facial heating did not affect mean body temperature onsets (P ± 0.97 and 0.27 for arm and chest sites, respectively) or slopes of cutaneous vasodilation (P = 0.49 and 0.43 for arm and chest sites, respectively), or the onsets (P = 0.89 and 0.94 for arm and chest sites, respectively), or slopes of sweating (P = 0.48 and 0.65 for arm and chest sites, respectively). Based on these findings, respiratory tract thermoreceptors, if present in humans, and selective facial skin heating do not modulate thermoeffector responses during passive heat stress.

Original languageEnglish (US)
Pages (from-to)R623-R627
JournalAmerican Journal of Physiology - Regulatory Integrative and Comparative Physiology
Volume309
Issue number5
DOIs
StatePublished - Sep 3 2015

Fingerprint

Heating
Inhalation
Thermoreceptors
Air
Thorax
Skin
Arm
Sweating
Hot Temperature
Vasodilation
Respiratory System
Leg
Laser-Doppler Flowmetry
Temperature
Sweat
Cheek
Body Temperature
Forearm
Respiration
Homeostasis

Keywords

  • Passive heat stress
  • Regional thermosensitivity
  • Skin blood flow
  • Sweat rate
  • Thermoregulation

ASJC Scopus subject areas

  • Physiology
  • Physiology (medical)

Cite this

Combined facial heating and inhalation of hot air do not alter thermoeffector responses in humans. / Wingo, Jonathan E.; Low, David A.; Keller, David M.; Kimura, Kenichi; Crandall, Craig G.

In: American Journal of Physiology - Regulatory Integrative and Comparative Physiology, Vol. 309, No. 5, 03.09.2015, p. R623-R627.

Research output: Contribution to journalArticle

@article{b2c110e51cd2436ea1dfafbb464064a0,
title = "Combined facial heating and inhalation of hot air do not alter thermoeffector responses in humans",
abstract = "The influence of thermoreceptors in human facial skin on thermoeffector responses is equivocal; furthermore, the presence of thermoreceptors in the respiratory tract and their involvement in thermal homeostasis has not been elucidated. This study tested the hypothesis that hot air directed on the face and inhaled during whole body passive heat stress elicits an earlier onset and greater sensitivity of cutaneous vasodilation and sweating than that directed on an equal skin surface area away from the face. Six men and two women completed two trials separated by ~1 wk. Participants were passively heated (waterperfused suit; core temperature increase ~0.9°C) while hot air was directed on either the face or on the lower leg (counterbalanced). Skin blood flux (laser-Doppler flowmetry) and local sweat rate (capacitance hygrometry) were measured at the chest and one forearm. During hot-air heating, local temperatures of the cheek and leg were 38.4± 0.8°C and 38.8± 0.6°C, respectively (P = 0.18). Breathing hot air combined with facial heating did not affect mean body temperature onsets (P ± 0.97 and 0.27 for arm and chest sites, respectively) or slopes of cutaneous vasodilation (P = 0.49 and 0.43 for arm and chest sites, respectively), or the onsets (P = 0.89 and 0.94 for arm and chest sites, respectively), or slopes of sweating (P = 0.48 and 0.65 for arm and chest sites, respectively). Based on these findings, respiratory tract thermoreceptors, if present in humans, and selective facial skin heating do not modulate thermoeffector responses during passive heat stress.",
keywords = "Passive heat stress, Regional thermosensitivity, Skin blood flow, Sweat rate, Thermoregulation",
author = "Wingo, {Jonathan E.} and Low, {David A.} and Keller, {David M.} and Kenichi Kimura and Crandall, {Craig G.}",
year = "2015",
month = "9",
day = "3",
doi = "10.1152/ajpregu.00018.2015",
language = "English (US)",
volume = "309",
pages = "R623--R627",
journal = "American Journal of Physiology - Heart and Circulatory Physiology",
issn = "0363-6135",
publisher = "American Physiological Society",
number = "5",

}

TY - JOUR

T1 - Combined facial heating and inhalation of hot air do not alter thermoeffector responses in humans

AU - Wingo, Jonathan E.

AU - Low, David A.

AU - Keller, David M.

AU - Kimura, Kenichi

AU - Crandall, Craig G.

PY - 2015/9/3

Y1 - 2015/9/3

N2 - The influence of thermoreceptors in human facial skin on thermoeffector responses is equivocal; furthermore, the presence of thermoreceptors in the respiratory tract and their involvement in thermal homeostasis has not been elucidated. This study tested the hypothesis that hot air directed on the face and inhaled during whole body passive heat stress elicits an earlier onset and greater sensitivity of cutaneous vasodilation and sweating than that directed on an equal skin surface area away from the face. Six men and two women completed two trials separated by ~1 wk. Participants were passively heated (waterperfused suit; core temperature increase ~0.9°C) while hot air was directed on either the face or on the lower leg (counterbalanced). Skin blood flux (laser-Doppler flowmetry) and local sweat rate (capacitance hygrometry) were measured at the chest and one forearm. During hot-air heating, local temperatures of the cheek and leg were 38.4± 0.8°C and 38.8± 0.6°C, respectively (P = 0.18). Breathing hot air combined with facial heating did not affect mean body temperature onsets (P ± 0.97 and 0.27 for arm and chest sites, respectively) or slopes of cutaneous vasodilation (P = 0.49 and 0.43 for arm and chest sites, respectively), or the onsets (P = 0.89 and 0.94 for arm and chest sites, respectively), or slopes of sweating (P = 0.48 and 0.65 for arm and chest sites, respectively). Based on these findings, respiratory tract thermoreceptors, if present in humans, and selective facial skin heating do not modulate thermoeffector responses during passive heat stress.

AB - The influence of thermoreceptors in human facial skin on thermoeffector responses is equivocal; furthermore, the presence of thermoreceptors in the respiratory tract and their involvement in thermal homeostasis has not been elucidated. This study tested the hypothesis that hot air directed on the face and inhaled during whole body passive heat stress elicits an earlier onset and greater sensitivity of cutaneous vasodilation and sweating than that directed on an equal skin surface area away from the face. Six men and two women completed two trials separated by ~1 wk. Participants were passively heated (waterperfused suit; core temperature increase ~0.9°C) while hot air was directed on either the face or on the lower leg (counterbalanced). Skin blood flux (laser-Doppler flowmetry) and local sweat rate (capacitance hygrometry) were measured at the chest and one forearm. During hot-air heating, local temperatures of the cheek and leg were 38.4± 0.8°C and 38.8± 0.6°C, respectively (P = 0.18). Breathing hot air combined with facial heating did not affect mean body temperature onsets (P ± 0.97 and 0.27 for arm and chest sites, respectively) or slopes of cutaneous vasodilation (P = 0.49 and 0.43 for arm and chest sites, respectively), or the onsets (P = 0.89 and 0.94 for arm and chest sites, respectively), or slopes of sweating (P = 0.48 and 0.65 for arm and chest sites, respectively). Based on these findings, respiratory tract thermoreceptors, if present in humans, and selective facial skin heating do not modulate thermoeffector responses during passive heat stress.

KW - Passive heat stress

KW - Regional thermosensitivity

KW - Skin blood flow

KW - Sweat rate

KW - Thermoregulation

UR - http://www.scopus.com/inward/record.url?scp=84940660662&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84940660662&partnerID=8YFLogxK

U2 - 10.1152/ajpregu.00018.2015

DO - 10.1152/ajpregu.00018.2015

M3 - Article

C2 - 26157054

AN - SCOPUS:84940660662

VL - 309

SP - R623-R627

JO - American Journal of Physiology - Heart and Circulatory Physiology

JF - American Journal of Physiology - Heart and Circulatory Physiology

SN - 0363-6135

IS - 5

ER -