• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Analysis of neural network responsible for matication in slice preparation

Research Project

Project/Area Number 05454501
Research Category

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

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

Principal Investigator

INOUE Tomio  Osaka University, Faculty of Dentistry, Assistant Professor, 歯学部, 講師 (70184760)

Co-Investigator(Kenkyū-buntansha) WAKISAKA Satoshi  Osaka University, Faculty of Dentistry, Associate Professor, 歯学部, 助教授 (40158598)
MATSUO Ryuji  Osaka University, Faculty of Dentistry, Associate Professor, 歯学部, 助教授 (30157268)
Project Period (FY) 1993 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥6,200,000 (Direct Cost: ¥6,200,000)
Fiscal Year 1994: ¥3,100,000 (Direct Cost: ¥3,100,000)
Fiscal Year 1993: ¥3,100,000 (Direct Cost: ¥3,100,000)
KeywordsTrigeminal / Motor nucleus / Motoneuron / In vitro / Intracelluar recording / Afterpotential / Calcium ion / Serotonin
Research Abstract

To know the phy siological and pharmacological mechanisms responsible for generation of spike discharge pattern of trigeminal motoneurons (TMNs), we examined afterpotentials of TMNs and effects of serotonin on TMNs by using intracellular recording in the rat brain stem slice preparation.
In most neurons afterhyperpolarization (AHP) was separated the fast (fAHP) from slow afterhyperpolarization (mAHP). Replacement of extracellular Ca^<2+> with calcium channel blocker Mn^<2+> or Co^<2+> reduced the mAHP amplitudes. Increasing extracellular Ca^<2+> concentration from 2 to 6mM enhanced the mAHP amplitudes. Furthermore, application of SK type Ca^<2+> dependent K^+ channel blocker apamin almost abolished the mAHP amplitudes. Regarding ADP,Increasing extracellular Ca^<2+> concentration did not enhance the ADP amplitude of all the neurons tested. When extracellular Ca^<2+> was elevated in combination with apamin application, the ADP amplitude was enhanced. Bath application of serotonin (20-100 muM) caused depolarization and increased input resistance in the most cells tested. Time-dependent inward rectification was enhanced by serotonin. These effects persisted in the presence of tetrodotoxin (1 muM). Serotonin also increased firing frequency response to injected current in every cell tested.
These results suggested mAHP may be due to activation of SK type Ca^<2+> dependent K^+ channel and Ca^<2+> influx play an important role of activation of ADP in the rat trigeminal motoneurons. It was also suggested that serotonin facilitates trigeminal motoneuron excitability.

Report

(3 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report
  • Research Products

    (16 results)

All Other

All Publications (16 results)

  • [Publications] Tomio Inoue: "Serotonergic facilitation of trigeminal motoneuron excitability in rats" The Japanese Journal of Physiology. 44. S224 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Masayuki Kobayashi: "Electrophysiological properties of rat motoneurons of jaw closing muscles" Neuroscience Rescarch. 19. S184 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 井上富雄: "三叉神経運動ニューロンに対するセロトニンの影響" 歯科基礎医学会雑誌. 36. 113 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 松尾龍二: "舌の機械刺激に対するラット鼓索神経応答:麻酔下と無麻酔下の記録" 日本味と匂学会誌. 1. 250-253 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Tomio Inoue: "Facititation of trigeminal motoneuron excitability by serotonin in the rat" 「Brain and Oral Function」-Oral motor function and dysfunction,sedited by T.Morimoto,T.Matsuya and K.Takada. (in press). (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Ryuji Matsuo: "Effect of saliva and licking on the initial portion of taste response of rat chorda tympani nerve" 「Brain and Oral Function」-Oral motor function and dysfunction,edited by T.Morimoto,T.Matsuya and K.Takada. (in press). (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Inoue, T.: "Serotonergic facillitation of trigeminal motoneuron excitability in rats." Jpn.J.Physiol.44. S224 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Kobayashi, M.: "Electrophysiological properties of rat motoneurons of jaw closing muscles." Neurosci.Res.19. S184 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Tomio Inoue: "Facilitation of trigeminal motoneuron excitability by serotonin in the rat." In : 「Brain and oral function」 -Oral motor function and dysfunction, edited by T.Morimoto, T.Matsuya and K.Takada. Amsterdam : Elsevier Sci.(in press). (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Ryuji Matsuo: "Effect of saliva and licking on the initial portion of taste response of rat chorda tympani nerve." In : 「Brain and oral function」 -Oral motor function and dysfunction, edited by T.Morimoto, T.Matsuya and K.Takada. Amsterdam : Elsevier Sci.(in press). (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Tomio Inoue: "Serotonergic facilitation of trigeminal motoneuron excitability in rats" The Japanese Journal of Physiology. 44. S224 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Masayuki Kobayashi: "Electrophysiological properties of rat motoneurons of jaw closing muscles." Neuroscience Research. 19. S184 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 井上富雄: "三叉神経運動ニューロンに対するセロトニンの影響" 歯科基礎医学会雑誌. 36. 113 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 松尾龍二: "舌の機械刺激に対するラット鼓索神経応答:麻酔下と無麻酔下の記録" 日本味と匂学会誌. 1. 250-253 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Tomio Inoue: "Facilitation of trigeminal motoneuron excitability by serotonin in the rat" 「Brain and oral function」‐Oral motor function and dysfunction,edited by T.Morimoto,T.Matsuya and K.Takada. (in press). (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] Ryuji Matsuo: "Effect of saliva and licking on the initial portion of taste response of rat chorda tympani nerve" 「Brain and Oral function」‐Oral motor function and dysfunction,edited by T.Morimoto,T.Matsuya and K.Takada. (in press). (1995)

    • Related Report
      1994 Annual Research Report

URL: 

Published: 1993-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi