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Paraventricular nucleus as a third system of cortical activation

Research Project

Project/Area Number 14570070
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Environmental physiology (including Physical medicine and Nutritional physiology)
Research InstitutionToho University

Principal Investigator

ARITA Hideho  Toho University, School of Medicine, Department of Physiology, Professor, 医学部, 教授 (20075576)

Co-Investigator(Kenkyū-buntansha) SEKI Yoshinari  Toho University School of Medicine, School of Medicine, Department of Physiology, Lecturer, 医学部, 助手 (10366479)
FUMOTO Masaki  Toho University School of Medicine, School of Medicine, Department of Physiology, Lecturer, 医学部, 助手 (40339180)
SATO-SUZUKI Ikuko  Toho University, School of Medicine, Department of Physiology, Assistant Professor, 医学部, 講師 (50297678)
NAKATANI Yasuji  Toho University School of Medicine, School of Medicine, Department of Physiology, Lecturer, 医学部, 助手 (80366492)
Project Period (FY) 2002 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2003: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2002: ¥2,600,000 (Direct Cost: ¥2,600,000)
Keywordscortical activation / yawning / orexin nucleus / histamine / CRH neuron / CRH神経 / 覚醒系 / CRH / オキシトシン / ノルアドレナリン神経
Research Abstract

The present study revealed that arousal/yawning response was evoked by microinjections of various agents (L-glutamate, cyanide, Orexin, histamine, etc.) into the medial parvocellular subdivision of the paraventricular nucleus(mpPVN) in an anesthetized, spontaneouly breathing rat. To evaluate arousal/yawning response, we monitored electrocorticogram(EcoG), intercostal electromyogram(EMG) as an index of inspiratory activity, digastric EMG and blood pressure.The arousal/yawning response was characterized by an arousal shift in EcoG to lower voltage and faster rhythms, and a single large inspiration with mouth opening. Since microinjection of L-glutame in mpPVN evoked the typical arousal/yawning response, we concluded that mpPVN is responsible for triggering the cortical activation. The same arousal/yawing response was induced by microinjection of cyanide, indicating that mpPVN is sensitive to chemical hypoxia or ischemia within the PVN. Microinjections of Orexin-A and/or Orexin-B into mpP … More VN also induced the arousal/yawning response, suggesting that arousal mechanism of Orexin is mediated by mpPVN. Microinjection of H1 histerminergic receptor agoinst into mpPVN also elicited the arousal/yawning response. Furthermore, we obtained the same arousal/yawning response was evoked by light stimulation. Higher light intesity significantly reduced the onset latency of the arousal/yawning response. Pretreatment with an H1-receptor antagonist which was injected into the lateral ventricle, blocked the arousal/yawning response induced by light stimulation, suggesting a role of brain histerminergic neurotransmission in modulating the light-induced arousal/yawning response. In morphological experiment, we found those cells which were double-stained by c-fos and CRH or c-fos and oxytocine in the mpPVN, when frequent yawings were induced by repetitive injections of L-glutamete. We hypothesize that CRH cells in mpPVN are responsible for cortical activation, whereas oxytocinergic neurons cause yawning behavior. Less

Report

(3 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] Seki Y, et al.: "Yawning/cortical activation induced by microinlection of histamine into the paraventricular"Behav Brain Res. 134. 75-82 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Seki Y, et al.: "Light induces cortical activation and yawning in rats."Behav Brain Res. 140. 65-73 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 北 一郎 他: "視床下部の覚醒機構"Clinical Neuroscience. 20(4). 394-397 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 鈴木郁子 他: "オキシトシンと自律神経機能"Clinical Neuroscience. 21(12). 1416-1418 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Seki Y, Sato-Suzuki I, Kita I, Oguri M, Arita H: "Yawning/cortical activation induced by microinjection of histamine into the paraventricular nucleus of the rat."Behav Brain Res. 134. 75-82 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Seki Y, Nakatani Y, Kita I, Sato-Suzuki I, Oguri M, Arita H: "Light induces cortical activation and yawning in rats."Behav Brain Res. 140. 65-73 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Seki Y, et al.: "Yawning/cirtical activation induced by microinjection of histamine into the naraventricular nucleus of the rat"Bahav Brain Res. 134. 75-82 (2002)

    • Related Report
      2003 Annual Research Report
  • [Publications] Seki Y, et al.: "Light induces cortical activation and yawning in rats"Behav Brain Res. 140. 65-73 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 北一郎, 鈴木郁子, 有田秀穂: "視床下部の覚醒機構"Clinical Neuroscience. 20. 394-397 (2002)

    • Related Report
      2003 Annual Research Report
  • [Publications] 鈴木郁子, 有田秀穂: "オキシトシンと自律神経機能"Clinical Neuroscience. 21. 1416-1418 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Sato Suzuki I, et al.: "Cortical arousal induced by microinjection of orexin into paraventricular ueclius of the rat"Behavioural Brain Research. 128. 169-177 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Seki Y.et al.: "Yawning/cortical activation induced by microinjection of histamine into the paraventricular nucleus of the rat"Behavioural Brain Research. 134. 75-82 (2002)

    • Related Report
      2002 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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