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Development of a new muscle dysfunction evaluation system focusing on grouped discharge

Research Project

Project/Area Number 18K17120
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 57050:Prosthodontics-related
Research InstitutionOkayama University

Principal Investigator

MAEDA NAOTO  岡山大学, 歯学部, 博士研究員 (10708051)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords咬筋 / 表面筋電図 / 顎関節症 / 群化放電 / 疲労 / 携帯型筋電計
Outline of Final Research Achievements

The purpose of this study was to investigate in detail the grouping discharge waveform observed on the masseter electromyogram. Although it has been reported that the grouped discharge waveform is associated with fatigue, there is no research on the grouped discharge of the masseter muscle in the world.
In this study, we analyzed the expression characteristics of the grouped discharge waveform in the masseter EMG recording of healthy subjects and patients with myofascial pain. As a result, it was found that the grouped discharge waveform was more frequently expressed in the masseter electromyogram of patients with temporomandibular disorders with muscular symptoms than in healthy adults. In the future, it is expected to develop a new diagnostic system for muscle dysfunction using the grouped discharge waveform.

Academic Significance and Societal Importance of the Research Achievements

本研究から,群化放電波形は筋筋膜痛を有する顎関節症患者に多く認められることが分かった.筋・筋膜性疼痛は臨床上遭遇する機会が多いが,レントゲン,MRI,血液検査など一般的に行われる検査では目に見える結果として現れないため,診断,治療が困難である.さらに,頭頸部の筋に関しては十分な科学的検討がなされていない現状がある.
これらのことから,本結果は,未だ科学的データの少ない顎口腔系の種々の機能異常と咀嚼筋活動との関連を明らかにする上で重要な意義を有すると考えられる.

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (5 results)

All 2019 2018

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (3 results)

  • [Journal Article] Characteristics of Grouped Discharge Waveforms Observed in Long-term Masseter Muscle Electromyographic Recording: A Preliminary Study2019

    • Author(s)
      Maeda N, Kodama N, Manda Y, Kawakami S, Oki K, Minagi S.
    • Journal Title

      Acta Medica Okayama

      Volume: 73 Issue: 4 Pages: 357-360

    • DOI

      10.18926/AMO/56938

    • NAID

      120006713039

    • URL

      https://ousar.lib.okayama-u.ac.jp/56938

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Effect of food properties and chewing condition on the electromyographic activity of the posterior tongue.2019

    • Author(s)
      Manda Y, Kodama N, Maeda N, Minagi S.
    • Journal Title

      Journal of Oral Rehabilitation

      Volume: ー Issue: 6 Pages: 511-517

    • DOI

      10.1111/joor.12774

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 大臼歯用CAD/CAMハイブリッドレジンのナノ構造とサンドブラスト処理による影響.2019

    • Author(s)
      西川悟郎,丸尾幸憲,長岡紀幸,吉原久美子,德永英里,前田直人,入江正郎,皆木省吾
    • Organizer
      第128回日本補綴歯科学会学術大会
    • Related Report
      2019 Research-status Report
  • [Presentation] デジタル画像による対向関係検査が有効であった全部床義歯症例検査方法簡易化の試み.2019

    • Author(s)
      岡本 信,坂本秀輝,井上誠太,安部 克,宋本儒享,德永英里,守屋佳典,山本美恵,森 慎吾,前田直人,沖 和広,西川悟郎,皆木省吾
    • Organizer
      第128回日本補綴歯科学会学術大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 咀嚼条件による舌後方部および咀嚼関連筋群の 活動パターン‐第一報‐2018

    • Author(s)
      森慧太朗,萬田陽介,兒玉直紀,前田直人,北川佳祐,長谷川萌,皆木省吾
    • Organizer
      日本顎口腔機能学会 第61回学術大会
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2022-01-27  

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