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The Influence of the Fear Induced Procedure on the Concentration of Brain Catecholamines.

Research Project

Project/Area Number 63570934
Research Category

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

Allocation TypeSingle-year Grants
Research Field 外科・放射線系歯学
Research InstitutionTokyo Medical and Dental University

Principal Investigator

KATAKURA Nobuo (1990)  Tokyo Medical and Dental Univ. Faculty of dentistry, Department of Dental Anesthesiology, Instructor, 歯学部, 助手 (20185804)

島田 晶彦 (1989)  東京医科歯科大学, 歯学部, 助手 (40170948)

深山 治久 (1988)  東京医科歯科大学, 歯学部, 助手 (20189921)

Co-Investigator(Kenkyū-buntansha) 片倉 伸郎  東京医科歯科大学, 歯学部, 助手 (20185804)
嶋田 昌彦  東京医科歯科大学, 歯学部, 助手 (40170948)
Project Period (FY) 1988 – 1990
Project Status Completed (Fiscal Year 1990)
Budget Amount *help
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1990: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1989: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1988: ¥1,000,000 (Direct Cost: ¥1,000,000)
KeywordsThalamic defense area / Defense reaction / Trigemino-autonomic refle / Trigemino-vagal reflex / Trigemino-sympathetic reflex / 三叉・自律神経反射 / 三叉・迷走神経反射 / 三叉・交感神経反射 / 恐怖 / 脳内 / カテコ-ルアミン / ド-パミン / ノルエピネフリン / エピネフリン / カテコルアミン / ドパミン / 学習
Research Abstract

Effects of stimulation of the hypothalamus that is thought to control emotional and behavioral patterns, eg fear, on the trigemino-autonomic reflex were studied in chloralose-anesthetized cats. The exact place of stimulation was the hypothalamic defense area, stimulation of which induced aggressive responses called defense reaction, such as mydriasis, increased blood pressure and tachycardia. The reflex discharges were recorded from the cervical vagel nerve, and the cardiac branch of the vagal nerve in response to electrical stimulation of the inferior alveolar nerve. The discharge in the cardiac branch of the vagal nerve evoked by the inferior alveolar nerve stimulation was completely abolished by transection of the cervical spinal cord, while it was not affected by section of the cervical vagal nerve. Thus the trigemino-autonomic reflex in the cardiac branch of the vagal nerve wholly consisted of the sympathetic nerve discharge (trigemino-sympathetic reflex), in contrast to that recorded form the cervical vagal nerve(trigemino-vagal reflex). The following results were obtained.
1) The trigemino-vagal reflex was depressed by repetitive stimulation of the hypothalamic defense area. The threshold was below that for inducing cardiovascular changes. Short train pulse applied to the hypothalamic defense area suppressed the trigemino-vagal reflex for about 200ms with a peak at about 40ms. It is suggested that the hypothalamic effect on the trigemino-vagal reflex was centrally induced and not the secondary effect of cardiovascular changes.
2) The trigemino-sympathetic reflex showed no definite changes in response to repetitive stimulation of the hypethalamic defense area.
These results support the notion that the trigemino-autonomic reflex is centrally intergraded to suit the cardiovascular system to the needs of the organism in defense reaction.

Report

(4 results)
  • 1990 Annual Research Report   Final Research Report Summary
  • 1989 Annual Research Report
  • 1988 Annual Research Report
  • Research Products

    (5 results)

All Other

All Publications (5 results)

  • [Publications] 小長谷 光: "三叉・自律神経反射に対する視床下部防衛領域刺激の効果" 日本歯科麻酔学会雑誌. 19. 38-50 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Katakura, Nobuo: "Effects of Stimulation of Hypothalamic Defense Area on Trigemino-autonomic Reflex in Cats" J. Jap. Dent. Soc. Anesthesiol.19-1. 38-50 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 小長谷 光: "三叉・自律神経反射に対する視床下部防衛領域刺激の効果" 日本歯科麻酔学会雑誌. 19. 38-58 (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] 嶋田晶彦: "笑気および電気刺激の内因性モルヒネ様物質に及ぼす影響" 日本歯科麻酔学会雑誌. 11. 441-449 (1983)

    • Related Report
      1989 Annual Research Report
  • [Publications] 深山治久: 日本歯科麻酔学会雑誌. 12. 450-458 (1984)

    • Related Report
      1988 Annual Research Report

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Published: 1988-04-01   Modified: 2016-04-21  

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