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1995 Fiscal Year Final Research Report Summary

Slective Brain Cooling in Hyperthermic Subjects and Its Inter-individual Difference

Research Project

Project/Area Number 06680125
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 体育学
Research InstitutionKANAZAWA COLLEGE OF ECONOMICS

Principal Investigator

HIRASHITA Masami  KANAZAWA COLLEGE OF ECONOMICS,ECONOMICS,PROFESSOR, 経済学部, 教授 (30102007)

Co-Investigator(Kenkyū-buntansha) IKEDA Yukio  KANAZAWA COLLEGE OF ECONOMICS,ECONOMICS,ASSISTANT PROFESSOR, 経済学部, 助教授 (90168146)
Project Period (FY) 1994 – 1995
KeywordsHyperthermia / Selective brain cooling / Sweat rate / Venous blood flow / Tympanic temperature / Esophagus temperature / Postural change / Heat stroke
Research Abstract

During hyperthermia, venous blood from the face and scalp flows into the intracranium through the ophthalmic and emissary veins, which is supposed to be an important response provoding selective brain cooling in humans. To understand a possible mechanism of this response, healthy male volunteers were subjected to either passive body warming or exercise, in a climatic chamber whose air temperature and relative humidity were 28゚C and 40%. During either passive body warming or exercise, forehead sweat rate and forehead skin blood flow started to increase shortly after the start of heat loading. A rather abrupt increase of venous flow through the opthalmic veins into the intracranium occurred significantly later than the increases on forehead sweat rate and skin blood flow. Tympanic temperature at this abrupt increase in ophthalmic venous flow did not differ between the test. Mean skin temperature at this flow increase was, however, significantly higher during passive body warming than in exercise. The abrupt increase of inward venous through the ophthalmic veins was not observed in nearly 20% of subjects. The reason for this inter-individual difference of this response is discussed.

  • Research Products

    (17 results)

All Other

All Publications (17 results)

  • [Publications] 田辺 実他: "高温環境下の姿勢変換による顔面の発汗量と皮膚血流量" 日生気誌. 31(1). 37-44 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 稲石 悟他: "マウスの寒冷暴露の体脂肪代謝に与えるβ遮断剤の効果" 金沢経済大学論集. 28(2). 121-134 (1994)

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      「研究成果報告書概要(和文)」より
  • [Publications] 田辺 実他: "運動時の手掌発汗量に及ぼす運動強度の影響" 発汗学. 1.2(1). 41-43 (1995)

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      「研究成果報告書概要(和文)」より
  • [Publications] 平下 政美: "運動時熱中症をおこす各種要因" 金沢経済大学雑誌"telos". 15. 7-15 (1995)

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      「研究成果報告書概要(和文)」より
  • [Publications] 平下 政美他: "高温環境下での長時間競技時の発汗量、飲水量および浸透圧の変化" 金沢経済大学雑誌"telos". 15. 37-43 (1995)

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      「研究成果報告書概要(和文)」より
  • [Publications] 永坂 鉄夫他: "Blood flow of human head skin in hyperthermia" Body Temperature and Metabolism. 149-152 (1995)

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      「研究成果報告書概要(和文)」より
  • [Publications] 平下 政美他: "幼小児の登園時における体温の変動と飲水量・発汗量" 金沢経済大学論集. 29(3). 75-85 (1996)

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      「研究成果報告書概要(和文)」より
  • [Publications] 丹羽 建市他: "運動時の環境温度と飲水量・発汗量及び体温に関する実態調査" 体力科学. 45(1). 151-158 (1996)

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      「研究成果報告書概要(和文)」より
  • [Publications] Tanabe M,Hirashita M,Hirai A and Nagasaka T.: "Changes in sweat rate and skin blood flow of the face by postural changes in a warm climate." Jpn.J.Biometeor.31. 37-44 (1994)

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      「研究成果報告書概要(欧文)」より
  • [Publications] Inaishi S,Yanagidaira T,Hirashita M.: "Effect of beta-blocker on the body fat metabolism during cold exposure in mice." Journal of Kanazawa College of economics.28 (1). 121-134 (1994)

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      「研究成果報告書概要(欧文)」より
  • [Publications] Tanabe M,Nagasaka T,Hirai A and Hirashita M.: "Effect of exercise intensities on palm sweating rate in humans." Japanese Journal of Perspiration Resaerch. 1・2 (1). 41-43 (1995)

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      「研究成果報告書概要(欧文)」より
  • [Publications] Hirashita M.: "Various factor of heat stroke during exercise." Research Institute for human and cultural scineces, Kanazawa college of economics.15. 7-15 (1995)

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      「研究成果報告書概要(欧文)」より
  • [Publications] Hirashita M,Ikeda Y.Nagasaka M,Miyaguchi A,Oomori S and Uketa S.: "Changes in sweating fluid inkake and osmotic pressure during athletic sports." Research Institute for human and cultural scineces, Kanazawa college of economics.15. 37-43 (1995)

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      「研究成果報告書概要(欧文)」より
  • [Publications] Magasaka T,Brinnel H,Tanabe T and Hirashita M.: "Blood flow of human head skin in hyperthermia." Body Temperature and Metabolism IPEC. Ine. 149-152 (1995)

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  • [Publications] Hirashita M,Ikeda U,Nagata M,Haruta A,Maeda Y and Ichikawa M.: "Body temperature changes and its relation to the amount of fluid intake and perspiration in children when entering kindergarten." Journal of Kanazawa College of economics.29 (3). 75-85 (1996)

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  • [Publications] Niwa K,Nakai S,Asayama M,Hirata K,Hanawa K,Ikawa S,Hirashita M,Sugawara M and Itou S.: "A survey of ambient temperature, drinking, sweating and body temperature." Jpn.J.Phys.Fitness Sports Med.45. 151-158 (1996)

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  • [Publications] Sakurada S,Shido O,Sugimoto N,Yoneda Y,Kaneko T,Nagasaka T and Hirashita M.: "Effect of aging on body core and ambient temperature at the onset of thermoregulatory responses in rats." Journal of Kanazawa College of economics.30 (1). 65-76 (1996)

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Published: 1999-03-09  

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