| Project/Area Number |
08670091
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Environmental physiology (including Physical medicine and Nutritional physiology)
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| Research Institution | KOBE WOMEN'S UNIVERSITY |
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Principal Investigator |
HIRATA Kozo KOBE WOMEN'S UNIV., FACULTY OF HOME ECONOMICS,DEPT.ENVIRON.PHYSIOL., PROFESSOR, 家政学部, 教授 (70110624)
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| Co-Investigator(Kenkyū-buntansha) |
YOSHIDA Minako KOBE WOMEN'S UNIV., FACULTY OF HOME ECONOMICS,DEPT.ENVIRON.PHYSIOL., ASSISTANT, 家政学部, 助手 (00299083)
SUYAMA Tomoko KOBE WOMEN'S JUNIOR COLLEGE,ASSISTANT, 助手
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| Project Period (FY) |
1996 – 1997
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| Project Status |
Completed (Fiscal Year 1997)
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| Budget Amount *help |
¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 1997: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1996: ¥1,800,000 (Direct Cost: ¥1,800,000)
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| Keywords | HEAT-INDUCED VASOCONSTRICTION / LOCAL HEATING / CAPILLARY VESSEL / ARTERIOVENOUS ANASTOMOSES BLOOD FLOW / BODY HEAT CONTENT / 動静脈吻合 / 暑熱血管収縮反応 / 高体熱量 |
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| Research Abstract |
It is well known that thermal stimuli to the skin reflexively induce skin vasoconstriction or vasodilation through thermoregulatory center in the hypothalamus, and that the regulation of finger blood flow including arteriovenous anastomoses (AVA) is different from that of capillary blood flow in the ordinary skin.
To investigate the effects of local heating on skin capillary and AVA blood flow responses, twenty healthy female volunteers were measured finger or forearm skin blood flow (SBF) using laser-Doppler flowmeter in the three thermal conditions. 1)Finger SBF decreased during local feet-heating from 37ﾟC to 40ﾟC of water temperature (Tw) at an ambient temperature (Ta) of 24.0-26.5ﾟC.2)Finger SBF decreased for 15 min during local leg-heating from 28ﾟC to 41ﾟC of Tw at Ta of 25ﾟC.However, forearm SBF did not. 3)At Ta of 28ﾟC,finger and forearm SBFs did not decrease during local leg-heating from 35ﾟC to 41ﾟC of Tw.
These results showed that local skin heating in the feet or legs reflexively induced finger vasoconstriction, however not in the forearm skin. Therefore the target blood vessel for the heat-induced vasoconstriction is probably in the AVA vessel, not in the capillary of the skin.
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