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Thermogenic and psychogenic sweating in humans: Identifying eccrine glandular recruitment patterns from glabrous and non-glabrous skin surfaces

Journal Article


Abstract


  • In this experiment, psychogenic (mental arithmetic), thermogenic (mean body temperature elevation of 0.6 °C)and combined thermo-psychogenic treatments were used to explore eccrine sweat-gland recruitment from glabrous (volar hand and forehead)and non-glabrous skin surfaces (chest). It was hypothesised that each treatment would activate the same glands, and that glandular activity would be intermittent. Nine individuals participated in a single trial with normothermic and mildly hyperthermic phases. When normothermic, a 10-min arithmetical challenge was administered, during which sudomotor activity was recorded. Following passive heating and thermal clamping, sweating responses were again evaluated (10 min). A second arithmetical challenge (10 min)was administered during clamped hyperthermia, with its sudorific impact recorded. The activity of individual sweat glands was recorded at 60-s intervals, using precisely positioned, and uniformly applied, starch-iodide papers. Those imprints were digitised and analysed. Peak activity typically occurred during the thermo-psychogenic treatment, revealing physiologically active densities of 128 (volar hand), 165 (forehead)and 77 glands.cm −2 (chest). Except for the hand (46%), glands uniquely activated by one treatment were consistently <10% of the total glands identified. Glandular activations were most commonly of an intermittent nature, particularly during the thermogenic treatment. Accordingly, we accepted the hypothesis that psychogenic, thermogenic and thermo-psychogenic stimuli activate the same sweat glands in both the glabrous and non-glabrous regions. In addition, this investigation has provided detailed descriptions of the intermittent nature of sweat-gland activity, revealing that a consistent proportion of the physiologically active glands are recruited during these thermal and non-thermal stimuli.

UOW Authors


  •   Schwarck, Janne (external author)
  •   Burdon, Catriona A. (external author)
  •   Taylor, Elizabeth A. (external author)
  •   Peoples, Gregory
  •   Machado-Moreira, Christiano (external author)
  •   Taylor, Nigel A.S.. (external author)

Publication Date


  • 2019

Citation


  • Schwarck, J. B., Burdon, C. A., Taylor, E. A., Peoples, G. E., Machado-Moreira, C. A. & Taylor, N. A. S. (2019). Thermogenic and psychogenic sweating in humans: Identifying eccrine glandular recruitment patterns from glabrous and non-glabrous skin surfaces. Journal of Thermal Biology, 82 242-251.

Scopus Eid


  • 2-s2.0-85065240313

Number Of Pages


  • 9

Start Page


  • 242

End Page


  • 251

Volume


  • 82

Place Of Publication


  • United Kingdom

Abstract


  • In this experiment, psychogenic (mental arithmetic), thermogenic (mean body temperature elevation of 0.6 °C)and combined thermo-psychogenic treatments were used to explore eccrine sweat-gland recruitment from glabrous (volar hand and forehead)and non-glabrous skin surfaces (chest). It was hypothesised that each treatment would activate the same glands, and that glandular activity would be intermittent. Nine individuals participated in a single trial with normothermic and mildly hyperthermic phases. When normothermic, a 10-min arithmetical challenge was administered, during which sudomotor activity was recorded. Following passive heating and thermal clamping, sweating responses were again evaluated (10 min). A second arithmetical challenge (10 min)was administered during clamped hyperthermia, with its sudorific impact recorded. The activity of individual sweat glands was recorded at 60-s intervals, using precisely positioned, and uniformly applied, starch-iodide papers. Those imprints were digitised and analysed. Peak activity typically occurred during the thermo-psychogenic treatment, revealing physiologically active densities of 128 (volar hand), 165 (forehead)and 77 glands.cm −2 (chest). Except for the hand (46%), glands uniquely activated by one treatment were consistently <10% of the total glands identified. Glandular activations were most commonly of an intermittent nature, particularly during the thermogenic treatment. Accordingly, we accepted the hypothesis that psychogenic, thermogenic and thermo-psychogenic stimuli activate the same sweat glands in both the glabrous and non-glabrous regions. In addition, this investigation has provided detailed descriptions of the intermittent nature of sweat-gland activity, revealing that a consistent proportion of the physiologically active glands are recruited during these thermal and non-thermal stimuli.

UOW Authors


  •   Schwarck, Janne (external author)
  •   Burdon, Catriona A. (external author)
  •   Taylor, Elizabeth A. (external author)
  •   Peoples, Gregory
  •   Machado-Moreira, Christiano (external author)
  •   Taylor, Nigel A.S.. (external author)

Publication Date


  • 2019

Citation


  • Schwarck, J. B., Burdon, C. A., Taylor, E. A., Peoples, G. E., Machado-Moreira, C. A. & Taylor, N. A. S. (2019). Thermogenic and psychogenic sweating in humans: Identifying eccrine glandular recruitment patterns from glabrous and non-glabrous skin surfaces. Journal of Thermal Biology, 82 242-251.

Scopus Eid


  • 2-s2.0-85065240313

Number Of Pages


  • 9

Start Page


  • 242

End Page


  • 251

Volume


  • 82

Place Of Publication


  • United Kingdom