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Effect of chewing task on dysphagia

Research Project

Project/Area Number 20K10069
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 57050:Prosthodontics-related
Research InstitutionNiigata University

Principal Investigator

Tsujimura Takanori  新潟大学, 医歯学系, 准教授 (00548935)

Co-Investigator(Kenkyū-buntansha) 井上 誠  新潟大学, 医歯学系, 教授 (00303131)
上羽 瑠美  東京大学, 医学部附属病院, 准教授 (10597131)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords咀嚼 / 嚥下 / 一口量 / 食塊動態 / 筋活動 / 咳嗽 / TRPV1 / ASIC / 電気生理学 / 摂食嚥下障害
Outline of Research at the Start

高齢者の肺炎予防として歯科介入の重要性が認識されており,特に摂食嚥下リハビリテーションにおける咀嚼の役割が注目されている.咀嚼により嚥下が制御されることは実験的に証明されているものの,そのメカニズムは解明されていない.本研究は,“咀嚼は安全かつ円滑な嚥下運動に寄与する”という仮説を立て,咀嚼による嚥下の制御メカニズムを解明することを最終目標とする.研究成果は,咀嚼および嚥下機能への理解を深めることに加えて,摂食嚥下障害患者に対する咀嚼の有効性ならびに「食」における咀嚼の意義を明らかにすることにつながり,国民のQOL向上に貢献すると期待できる.

Outline of Final Research Achievements

The aim of this study was to investigate the effect of chewing well on chewing and swallowing. Participants ate 8, 12, and/or 16 g of steamed rice with barium sulphate under two condition; chewing freely (CF) and chewing well (CW). We evaluated bolus transport and muscle activity using videofluorography and electromyography of the masseter, suprahyoid and infrahyoid muscles. Hypopharyngeal transit time (HTT) at the first swallow for CW was significantly shorter and longer than FC in 12 and 16 g, respectively. HTT did not differ between two conditions in 8 g. Upper esophageal sphincter transit duration was significantly longer for CW than CF in 16 g. The hypopharyngeal bolus velocity for CW was significantly faster than FC in 12 g. The difference between CW and CF in the estimated swallowed bolus volume was positively correlated with that in upper esophageal sphincter transit duration in 16 g. We speculate that CW modulates HTT during swallowing depending on the ingestion volume.

Academic Significance and Societal Importance of the Research Achievements

本研究は,よく噛むことが咀嚼・嚥下に与える影響を目的として,健常成人を対象として行われた.咀嚼機能において,よく噛むことは,少量および中等量では咀嚼時筋活動を減少し,多量では筋活動に影響はないものの,初回嚥下量を増加することが確認された.一方,嚥下機能において,よく噛むことは,中等量では下咽頭通過時間を短縮し,多量では下咽頭通過時間を延長することが確認された.以上から,よく噛むことは,一口量に応じて咀嚼・嚥下機能に与える効果が異なることがわかり,このことは摂食嚥下障害患者における一口量と咀嚼動作の重要性を示唆している.

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (5 results)

All 2022 2021 2020

All Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (2 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results) Book (1 results)

  • [Journal Article] Involvement of capsaicin-sensitive nerves in the initiation of swallowing evoked by carbonated water in anesthetized rats2020

    • Author(s)
      Kojun Tsuji, Takanori Tsujimura, Shogo Sakai, Taku Suzuki, Midori Yoshihara, Kouta Nagoya, Jin Magara, Yoshihide Sato, Makoto Inoue
    • Journal Title

      Am J Physiol Gastrointest Liver Physiol

      Volume: 319(5) Issue: 5 Pages: G564-G572

    • DOI

      10.1152/ajpgi.00233.2020

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Comparison of physical properties of voluntary coughing, huffing and swallowing in healthy subjects2020

    • Author(s)
      Akiko Yawata, Takanori Tsujimura, Ryosuke Takeishi, Jin Magara, Li Yu, Makoto Inoue
    • Journal Title

      PLoS One

      Volume: 15(12) Issue: 12 Pages: e0242810-e0242810

    • DOI

      10.1371/journal.pone.0242810

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 筋電図を用いた顎口腔機能計測と臨床応用への期待2022

    • Author(s)
      辻村恭憲,真柄 仁,井上 誠
    • Organizer
      第28回 日本摂食嚥下リハビリテーション学会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Volitional chewing affects pharyngeal bolus transit time during swallowing2021

    • Author(s)
      Takanori Tsujimura, Jin Magara, Akira Okubo, Nobuaki Saka, Yuta Nakajima, Makoto Inoue
    • Organizer
      6th International Conference on Food Oral Processing
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Book] Crosslink言語聴覚療法学テキスト2022

    • Author(s)
      辻村恭憲
    • Total Pages
      6
    • Publisher
      メジカルビュー社
    • Related Report
      2022 Annual Research Report

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Published: 2020-04-28   Modified: 2024-01-30  

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