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Central neural mechanisms responsible for correlation of mastication with excitability of spinal reflex

Research Project

Project/Area Number 03454426
Research Category

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

Allocation TypeSingle-year Grants
Research Field Functional basic dentistry
Research InstitutionTokyo Medical and Dental University

Principal Investigator

NAKAMURA Yoshio  Professor Department of Physiology Faculty of Dentistry, Tokyo Medical and Dental University, 歯学部, 教授 (10010026)

Project Period (FY) 1991 – 1992
Project Status Completed (Fiscal Year 1992)
Budget Amount *help
¥6,000,000 (Direct Cost: ¥6,000,000)
Fiscal Year 1992: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1991: ¥4,800,000 (Direct Cost: ¥4,800,000)
KeywordsCrural muscles / Monosynaptic reflex / Masticatory movements / Fictive mastication / Facilitation / Non-reciprocal / Motoneuron / Postsynaptic excitation / H反射 / 興奮性上昇 / 咀嚼 / 運動機能 / 噛みしめ / 脊髄単シナプス反射 / ヒラメ筋 / H波 / 中枢神経機構
Research Abstract

1.Modulation of H reflex of the soleus muscle was studied during gum-chewing and rhythmical jaw-opening and closing movements without contact of upper and lower teeth in 5 healthy adult male subjects. We found (1) that the amplitude of the H reflex increased tonically throughout either of the rhythmical jaw movements, and (2) that there was no significant difference in the increase in reflex amplitude between the jaw-closing and - opening phases. It was concluded (1) that the soleus H reflex is tonically facilitated during mastication and (2) that afferent impulses from intraoral mechanoreceptors are not indispensable for the facilitation.
2. Mode of facilitation of H reflex of crural muscles during mastication and the central neural mechanisms underlying the facilitation were studied in urethane-anesthetized rabbits. Two pairs of bipolar silver-wire electrodes were fixed to the tibial nerve innervating crural extensors and the common peroneal nerve innervating crural flexors, respectiv … More ely. Monosynaptic reflex volleys (efferent activities eliciting H reflex) evoked by stimulation of either nerve with the proximal electrodes were recorded with the distal electrodes. Modulation of the reflex discharges was studied during masticatory movements induced by repetitive stimulation of the cortical masticatory area (CMA). (1) The reflex volleys recorded from either nerve tonically increased in amplitude during CMA-induced actual and ficitvie masticatory movements, with no significant difference between jaw-opening and-closing phases. (2) Antidromic field potentials in the anterior horn of the lumbar cord evoked by either the tibial or common peroneal nerve increased during actual and fictive mastication. It was concluded (1) that H reflex of crural muscles undergoes a tonic non-reciprocal facilitation during mastication, (2) that intraoral mechanoreceptive afferents are not essential for the facilitation, and (3) that an increase in excitability of motoneurons is involved in the facilitation of the H reflex during mastication. Less

Report

(3 results)
  • 1992 Annual Research Report   Final Research Report Summary
  • 1991 Annual Research Report
  • Research Products

    (15 results)

All Other

All Publications (15 results)

  • [Publications] 宮原 隆雄: "ヒトのヒラメ筋H反射の噛みしめによる変調" 口病誌. 58. 28-44 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 宮原 隆雄,萩谷 昇,大山 喬史,中村嘉男: "噛みしめに伴うヒトヒラメ筋H反射促通に対する咬筋活動の反射性抑制の効果" 歯基礎誌. 33(抄緑集). 122-122 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Miyahara,T.,Ohyama,T.and Nakamura,Y.: "Correlation between soleus H-reflex and EMG activity of m.masseter during teeth clenching in humans" J.Dent.Res.70. 792-792 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 宮原 隆雄,萩谷 昇,大山 橋史,中村 嘉男: "噛みしめに伴うヒトヒラメ筋H反射の促通動態" 脳波と筋電図. 120. 216-216 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 萩谷 昇,宮原 隆雄,田中 立弥,大山 喬史,中村 嘉男: "顎運動時にみられるウサギ後肢単シナプス反射の変調" 歯基礎誌. 34(抄緑集). 172-172 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Hagiya,N.,Miyahara,T.,Ohyama,T.& Nakamura,Y.: "Modulation of soleus H-reflex during rhythmical jaw movements in humans" J.Dent.Res.71. 1044-1044 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Miyahara,T.: "Modulation of soleus H-reflex by teeth clenching (in Japanese with English summary)" J. Stomatol. Jpn.58. 670-686 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Miyahara,T.,Hagiya,N.,Ohyama,T.and Nakamura,Y.: "Effects of reflex inhibition of masseter muscle activity on facilitation of soleus H reflex induced by teeth clenching in humans (in Japanese)" Jpn. J. Oral Biol.33(Suppl.). 112 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Miyahara,T.,Ohyama,T.and Nakamura,Y.: "Correlation between soleus H-reflex and EMG activity of m.masseter during teeth clenching in humans" J. Dent. Res.70. 792 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Miyahara,T.,Haigya,N.,Ohyama,T.and Nakamura,Y.: "Temporal pattern of facilitation of soleus H reflex induced by teeth clenching in humans (in Japanese)" Jpn. J. EEG EMG. 120. 216 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Hagiya,N.,Miyahara,T.,Tanaka,T.,Ohyama,T.and Nakamura,Y.: "Modulation of hindlimb monosynaptic reflex in association with jaw movements in rabbits (in Japanese)" Jpn. J. Oral Biol.34(Suppl.). 172 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Hagiya,N.,Miyahara,T.,Ohyama,T.and Nakamura,Y.: "Modualtion of soleus H-reflex during rhythm ical jaw movements n humans" J. Dent. Res.71. 1044 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Hagiya,N.,Miyahara,T.,Ohyama,T.& Nakamura,Y.: "Modulation of soleus H-feflex during rhythmical jaw movements in humans" J.Dent.Res.71. 1044-1044 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 宮原 隆雄,萩谷 昇,大山 喬史,中村 嘉男: "噛みしめに伴うヒトヒラメ筋H反射の促通動態" 脳波と筋電図. 120. 216-216 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 萩谷 昇,宮原 隆雄,田中 立弥,大山 喬史,中村 嘉男: "顎運動時にみられるウサギ後肢単シナプス反射の変調" 歯基礎誌. 34(キツ録集). 172-172 (1992)

    • Related Report
      1992 Annual Research Report

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Published: 1991-04-01   Modified: 2016-04-21  

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