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EVOKED EMG of THE MASTICATORY MUSCLES by TRANSCRANIAL MAGNETIC STIMULATION IN MAN

Research Project

Project/Area Number 07457474
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 補綴理工系歯学
Research InstitutionNAGASAKI UNIVERSITY

Principal Investigator

FUJII Hiroyuki  NAGASAKI UNIVERSITY,SCHOOL of DENTISTRY,PROFESSOR, 歯学部, 教授 (20067060)

Co-Investigator(Kenkyū-buntansha) YOSHIMATSU Tadashi  NAGASAKI UNIVERSITY,SCHOOL of DENTISTRY,ASSISTANT PROFESSOR, 歯学部附属病院, 助手 (50230800)
HASHIMOTO Nobuyuki  NAGASAKI UNIVERSITY,SCHOOL of DENTISTRY,ASSISTANT PROFESSOR, 歯学部, 助手 (50198686)
菅 浩二  長崎大学, 歯学部, 助手 (70244085)
Project Period (FY) 1995 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥6,800,000 (Direct Cost: ¥6,800,000)
Fiscal Year 1996: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1995: ¥5,500,000 (Direct Cost: ¥5,500,000)
KeywordsMAGNETIC STIMULATION / CORTEX / EVOKED EMG / MASTICATORY MUSCLE / MASSETER / DEPRESSION PHASE / MAN / 経頭蓋磁気刺激 / 咀嚼筋誘発筋電図 / 両側性応答
Research Abstract

Using a transcranial magnetic stimulation, peripherally or centrally induced responses of the masseter muscle were electromyographically analized in man.
By positioning the center of a stimulating coil at 9cm far inferolaterally from the vertex along a contour of the skull, four responses were induced from the ipsilateral masseter muscle. Other two responses were recorded from the contralatera masseter muscle by positioning the coil center at 3-5.5cm laterally and 2.5cm anteroirly from the vertex.
latencies of the ipsilateral responses were 6msec, 10-13msec and 2-3msec in the order of threshold level. These responses were thought to be M-wave, a wave corresponding to S-wave in the extremity muscles, one drived from the cortex, and H-wave, respectively.
Latencies of the contralateral responses were 11-13msec and 23msec. The former is the most likely to be I-wave (Amassian : 1987) drived from the cortex, or D-wave (Edyly : 1990).
When the stimulus was applied during a gum-chewing without any expectations, a cycle time of the stroke was remarkably prolonged, and the rhythm of following 2-3 strokes became unstable. This is thought to e an effect of the disturbance on a rhythm generator due to cortical stimulation.
By magnetic stimulation, an incomplete depression phase appeared on the masseter EMG with a latency of approximately 80msec. This long-latency depression might related to the cortex in the orign.

Report

(3 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] 橋本信行: "磁気刺激による咬筋の誘発筋電図応答" 日本顎頭蓋機能学会誌. 8. 53 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 橋本信行: "磁気刺激の実際と皮質由来電位の記録" 日本磁気歯科学会雑誌. 5. 90-91 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 橋本信行: "磁気刺激によって出現した咬筋筋電図の抑制パターン" 日本磁気歯科学会雑誌. 6(予定). (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] NOBUYUKI,HASHIMOTO: "Responses in evoked masseter EMG induced by magnetic stimulation in man" J.J.cranio-mandibular orthopedics. 8. 53 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] NOBUYUKI,HASHIMOTO: "Magnetic stimulator and action potentials in musseter EMG derived from the cortex" J.J.Mag.Dent.5. 90-91 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] NOBUYUKI,HASHIMOTO: "Depression phase in masseter EMG induced by magnetic stimulation" J.J.Mag.Dent.6, (in press). (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 橋本 信行: "磁気刺激による咬筋の誘発筋電図応答" 日本顎頭蓋機能学会誌. 8-(1). 53 (1995)

    • Related Report
      1996 Annual Research Report
  • [Publications] 橋本 信行: "磁気刺激の実際と皮質由来電位の記録" 日本磁気歯科学会雑誌. 5-(1). 90-91 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 橋本 信行: "磁気刺激によって出現した咬筋筋電図の抑制パターン" 日本磁気歯科学会雑誌. 6-(1)(予定). (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 橋本 信行,藤井 弘之: "磁気刺激の実際と皮質由来電位の記録" 日本磁気歯科学会雑誌 第5回学術大会講演抄録集. 30-30 (1995)

    • Related Report
      1995 Annual Research Report

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Published: 1995-04-01   Modified: 2016-04-21  

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