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A role of muscle spindle afferents in the control of masticatory jaw movements.

Research Project

Project/Area Number 62480376
Research Category

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

Allocation TypeSingle-year Grants
Research Field Functional basic dentistry
Research InstitutionOsaka University

Principal Investigator

MORIMOTO Toshifumi  Osaka Univ., Faculty of Dentistry, Professor, 歯学部, 教授 (20028731)

Co-Investigator(Kenkyū-buntansha) MASUDA Yuji  Osaka Univ., Faculty of Dentistry, Instructor, 歯学部, 助手 (20190366)
INOUE Tomio  Osaka Univ., Faculty of Dentistry, Instructor, 歯学部, 助手 (70184760)
Project Period (FY) 1987 – 1988
Project Status Completed (Fiscal Year 1988)
Budget Amount *help
¥6,300,000 (Direct Cost: ¥6,300,000)
Fiscal Year 1988: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1987: ¥5,300,000 (Direct Cost: ¥5,300,000)
KeywordsJaw movements / Masticatory force / Muscle spindle / Mesencephalic trigeminal nucleus / ウサギ / 一次終末 / 筋感覚受容器 / 咀嚼 / 顎運動 / 歯根膜感覚
Research Abstract

Contribution of muscle spindle endings to the control of masticatory jaw-movements and jaw-closing muscle activities was studies 1) by examining the effects of making a lesion of the trigeminal mesencephalic nucleus (Mes V), in which ganglion cells of muscle spindle afferents locate, on EMG activities of the masseter muscle, and 2) by analysing activities of the Mes V neurons during chewing a test strip. The results are as follows : 1) the masseteric EMG activities during chewing a test strip were significantly reduced by lesioning the Mes V; 2) the Mes V units, which were excited at the beginning of both the jaw-opening and occlusion pheses, increased their firing frequency during chewing a test strip. They were sensitive to suxamethonium administration and supposed to be the primary spindle afferents. Based on these results, we conclude that the muscle spindles of jaw-closing muscles (presumably primary endings) contribute to the enhancement of jaw-closing muscle activities and thus increased the medial excursing of the jaw during the occlusion phase of a masticatory cycle.

Report

(3 results)
  • 1988 Annual Research Report   Final Research Report Summary
  • 1987 Annual Research Report
  • Research Products

    (26 results)

All Other

All Publications (26 results)

  • [Publications] T.,Nagashima;M.,Yoshida;Y.,Masuda;T.,Inoue;T.,Morimoto: J.Physiol.Soc.Jap.49. 407 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] T.,Morimoto;T.,Inoue;Y.,Masuda;T.,Nakamura;T.,Nagashima: Neurosci.Res.Suppl.5. S136 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Y,Masuda;T.,Inoue;O.,Saitou;T.,Morimoto: Neurosci.Res.Suppl.7. S200 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] T.,Inoue;Y.,Masuda;O.,Saitou;T.,Morimoto: J.Physiol.Soc.Jap.50. 450 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] T.,Nakamura;T.,Inoue;S.,Ishigaki;T.,Morimoto;T.,Maruyama: Int.J.Prosthodont.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] T.,Inoue;Y.,Masuda;T.,Nakamura;Y.,Kawamura;T.,Morimoto: Exp.Brain Res.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] T.,Morimoto: "Perception of intraoral stimulation,"Neurophysiology of the jaws and teeth"." A. Taylor(ed. ),McMillan,

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] T. Nagashima; M. Yoshida; Y. Masuda; T. Inoue; T. Morimoto: "Discharge patterns of the mesencephalic trigeminal neurons during masticatory jaw movement in the rabbit." J. Physiol. Soc. Jap.49. 407 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] T. Morimoto; T. Inoue; Y. Masuda; T. Nakamura; T. Nagashima: "Autoregulation of masticatory muscle activities by muscle and periodontal receptors." Neurosci. Res.Supple 5. 136 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Y. Masuda; T. Inoue; O. Saitou; T. Morimoto: "Oro-facial sensory projection to cortical masticatory area in the rabbit." Neurosci. Res.Supple 7. 200 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] T. Inoue; Y. Masuda; O. Saitou; T. Morimoto: "Convergence of cortical and peripheral inputs to brain stem neurons in the rat." J. Physiol. Soc. Jap.50. 450 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] T. Nakamura; T. Inoue; S. Ishigaki; T. Morimoto; T. Maruyama: "Difference on jaw movements and jaw muscle activities between natural and guided chew cyscle." Int. J. Prosthodont.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] T. Morimoto: Perception of intraoral stimulation, "Neurophysiology of the jaws and teeth".A. Taylor(ed.), McMillan,

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] T.Nagashima;M.Yoshida;Y.Masuda;T.Inoue;T.Morimoto: J.Physiol.Soc.Jap.49. 407 (1987)

    • Related Report
      1988 Annual Research Report
  • [Publications] T.Morimoto;T.Inoue;Y.Masuda;T.Nakamura;T.Nagashima: Neurosci.Res.Suppl.5. S136 (1987)

    • Related Report
      1988 Annual Research Report
  • [Publications] Y.Masuda;T.Inoue;O.Saitor;T.Morimoto.: Neurosci.Res.Suppl.7. S200 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] T.Inoue;Y.Masada;O.Saitou;T.Morimoto: J.Physiol.Soc.Jap.50. 450 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] T.Nakamura;T.Inoue;S.Ishigaki;T.Morimoto;T.Maruyama: Int.J.Prosthodont.

    • Related Report
      1988 Annual Research Report
  • [Publications] T.Inoue;Y.Masuda;T.Nakamura;Y.Kawamura;T.Morimoto: Exp.Brain Res.

    • Related Report
      1988 Annual Research Report
  • [Publications] T.Morimoto: "Perception of intraoral stimulation,"Neurophysiology of the jaws and teeth"." McMillan,

    • Related Report
      1988 Annual Research Report
  • [Publications] Nagashima,T;Yoshida,M;Masuda,Y;Inoue,T;Morimoto,T: J.Physiol.Soc.Jap.49. 407 (1987)

    • Related Report
      1987 Annual Research Report
  • [Publications] Morimoto,T;Inoue,T;Van Willigen,J.D.: Prog.Abstr.of 35th Ann.Meeting of JADR. (1987)

    • Related Report
      1987 Annual Research Report
  • [Publications] Morimoto,T;Inoue,T;Masuda,Y;Nakamura,T;Nagashima,T: Neurosci.Res.5. S136 (1987)

    • Related Report
      1987 Annual Research Report
  • [Publications] 長島正,吉田実,増田裕次,井上富雄,森本俊文: 第64回日本生理学会大会予稿集. 184 (1987)

    • Related Report
      1987 Annual Research Report
  • [Publications] 増田裕次,井上富雄,西塔治,森本俊文: 歯科基礎医学会雑誌,抄録集. 29. 294 (1987)

    • Related Report
      1987 Annual Research Report
  • [Publications] 森本俊文: 咀嚼システムの形成と適応,抄録集. 7 (1987)

    • Related Report
      1987 Annual Research Report

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Published: 1987-04-01   Modified: 2016-04-21  

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