Cutaneous thermal thresholds of tropical indigenes residing in Japan
Cutaneous thermal thresholds of tropical indigenes residing in Japan
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DOI：
10.1016/j.jtherbio.2011.08.002
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发表时间：
2011-10-01
影响因子：
2.7
通讯作者：
Tochihara, Yutaka
中科院分区：
文献类型：
--
作者：
Lee, Joo-Young;Bakri, Ilham;Tochihara, Yutaka
本研究的目的是研究居住在温带气候的热带土著人的皮肤热感觉的不适应。在热带地区出生和长大，但在日本居住了5-61个月的热带土著（n= 13）与温带土著（n=11）一起参加了本研究。使用由珀尔帖元件和按钮开关控制的热刺激器，在12个身体区域测量他们的皮肤热阈值，以感受温暖、凉爽、炎热和寒冷。当受试者从中性热状态感知到“微热”、“微冷”、“热”或“冷”的感觉时，他们就按下按钮开关。结果表明：(1)热带土著居民在日本停留时间与皮肤热阈值无显著相关；(2)热带植物对暖、热、冷、凉的感觉敏感度分别比温带植物低3.3、3.5、4.2和7.3℃（P < 0.05）；(3)热带土著居民的冷热感觉阈间区要比温带土著居民宽。结果表明，尽管热带土著居民在温带气候中居住长达61个月，但他们的皮肤热阈值的热适应性质仍然保持不变，这表明他们对温暖和寒冷的感知比温带土著居民更迟钝。(C) 2011 Elsevier Ltd.版权所有。
The purpose of this study was to examine the deacclimatization of the cutaneous thermal sensations of tropical indigenes residing in temperate climates. Tropical indigenes (n = 13) who were born and raised in tropics but had resided in Japan for 5-61 months participated in this study, along with temperate indigenes (n=11). Their cutaneous thermal thresholds for warm, cool, hot, and cold sensations were measured in 12 body regions using a thermal stimulator controlled by a Peltier element and a push button switch. Subjects pressed the button-switch as soon as they perceived a feeling of being 'slightly warm', 'slightly cool', 'hot', or 'cold' from a neutral thermal state. Our results showed that: (1) among the tropical indigenes, no significant relationship was found between the duration of their stay in Japan and their cutaneous thermal thresholds; (2) the tropical indigenes were, on average, 3.3, 3.5, 4.2, and 7.3 degrees C less sensitive to warm, hot, cool, and cold sensations, respectively, than the temperate indigenes (P < 0.05); and (3) the inter-threshold sensory zones between cutaneous warmth and coolness, and hot and cold sensations were wider among the tropical indigenes than among the temperate indigenes. It was concluded that the nature of the heat acclimatization of the cutaneous thermal thresholds for the tropical indigenes was retained despite their residence in a temperate climate for up to 61 months, indicating that they had more blunted perceptions of both warming and cooling than the temperate indigenes. (C) 2011 Elsevier Ltd. All rights reserved.