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Title: Sex differences in age-related changes on peripheral warm and cold innocuous thermal sensitivity
Authors: Inoue, Yoshimitsu
Gerrett, Nicola
Ichinose-Kuwahara, Tomoko
Umino, Yasue
Kiuchi, Saeko
Amano, Tatsuro
Ueda, Hiroyuki
Havenith, George
Kondo, N.
Keywords: Sex
Thermal sensitivity
Regional differences
Issue Date: 2016
Publisher: © Elsevier
Citation: INOUE, Y. ... et al., 2016. Sex differences in age-related changes on peripheral warm and cold innocuous thermal sensitivity. Physiology and Behavior, 164 (Part A), pp. 86–92.
Abstract: Cutaneous thermal sensitivity to a warm and cold stimulus was compared amongst 12 older (OF, 65.2±1.0year) and 29 younger (YF, 21.6±0.2years) female participants, and 17 older (OM, 66.2±1.5years) and 13 younger (YM, 21.2±0.4years) male participants to examine the effects of ageing and sex. In a neutral condition (27.5°C, 50% RH) during rest, warm and cold thermal sensitivity was measured on eight body regions (forehead, chest, back, forearm, hand, thigh, calf, and foot). Using the method of limits, a thermal stimulator was applied to the skin at an adapting temperature and either increased or decreased at a constant rate (0.3°C/s) until the participants detected the temperature with a push button. Thermal sensitivity declined with ageing to both a cold (older: 1468.6±744.7W/m(2), younger: 869.8±654.7W/m(2), p<0.001) and warm (older: 2127.0±1208.3W/m(2), younger: 1301.7±1055.2W/m(2), p<0.001) innocuous stimulus. YF and OF were more sensitive than YM and OM to both a warm and cold stimulus (p<0.05). There was no interaction between age and sex suggesting that whilst thermal sensitivity decreases with age the decrease is similar between the sexes (p>0.05). There was an interaction between temperatures, age and location and it seemed that cold thermal sensitivity was more homogenous for young and older participants however warm thermal sensitivity was more heterogeneous especially in the younger participants (p<0.05). Although the pattern was not similar between ages or sexes it was evident that the forehead was the most sensitive region to a warm and cold stimulus. Interestingly the decline in sensitivity observed with ageing occurred for all locations but was attenuated at the forehead in both males and females (p>0.05).
Description: This paper was accepted for publication in the journal Physiology and Behavior and the definitive published version is available at http://dx.doi.org/10.1016/j.physbeh.2016.05.045.
Sponsor: This study was partly supported by a Grant-in-Aid for Scientific Research (grant nos. 16500435 and 20247035).
Version: Accepted for publication
DOI: 10.1016/j.physbeh.2016.05.045
URI: https://dspace.lboro.ac.uk/2134/21637
Publisher Link: http://dx.doi.org/10.1016/j.physbeh.2016.05.045
ISSN: 0031-9384
Appears in Collections:Published Articles (Design School)

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