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2020 Fiscal Year Final Research Report

The effect of jaw clenching on sporting activity

Research Project

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Project/Area Number 19K19964
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 59020:Sports sciences-related
Research InstitutionOsaka Dental University

Principal Investigator

Tanaka Yuto  大阪歯科大学, 歯学部附属病院, 講師 (10711038)

Project Period (FY) 2019-04-01 – 2021-03-31
Keywords噛み締め / 予測的姿勢制御
Outline of Final Research Achievements

This study aimed to investigate the effect of jaw clenching on anticipatory postural adjustments (APAs) and reactive postural adjustments (RPAs). Jaw clenching resulted in an earlier onset of APAs and a greater amplitude of trunk and lower limb EMG activities in the APAs and RPAs. There were no differences in COM and COP displacements after the perturbation. Jaw clenching is effective for enhancing APAs and RPAs, although it may not increase postural stability following predictable external perturbation in healthy adults. Our research, which focuses on postural stability, may be important for therapists and researchers working on improving the postural stability in individuals with pathologies of the central nervous system.

Free Research Field

スポーツ歯学

Academic Significance and Societal Importance of the Research Achievements

これまで同研究分野では、噛み締めは体幹のスポーツパフォーマンスの向上や頭頚部外傷予防に効果的だという研究が多くなされてきているが、これら研究では閉口筋の活動量が増加すれば噛み締めているとして評価されてきたため、噛み締めの効果が誤って解釈されていた可能性があった。本研究では、咬合接触を伴わず開閉咬筋の同時収縮により得られる下顎の固定と、咬頭嵌合位での噛み締めにより得られる下顎の固定とを明確に区別した。一方で本研究により、スポーツ時の下顎位の実態あるいは噛み締めの効果の確からしさが向上したと考える。

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Published: 2022-01-27  

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