2021 Fiscal Year Final Research Report
Elucidation of the relationship of chewing tongue movement, posture adjustment and food texture
Project/Area Number |
19K19112
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Research Category |
Grant-in-Aid for Early-Career Scientists
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Allocation Type | Multi-year Fund |
Review Section |
Basic Section 57050:Prosthodontics-related
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Research Institution | Osaka Dental University |
Principal Investigator |
Kakudo Masaki 大阪歯科大学, 歯学部, 助教 (80758061)
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Project Period (FY) |
2019-04-01 – 2022-03-31
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Keywords | 舌運動 / 超音波画像検査 / 咀嚼 / 嚥下 / 舌 / オーラルリハビリテーション / 口腔リハビリテーション / 姿勢調整 |
Outline of Final Research Achievements |
In this study, we investigated the effects of posture adjustment during food intake and differences in foods on tongue movement during mastication using ultrasonography. It was shown that the difference between crushing with the tongue and mastication can be discriminated by visually observing the ultrasonic image of the tongue movement in the chewing start meal(CSM). Ultrasound image analysis from the start of CSM intake to swallowing showed that tongue movement increased with amount of food. Regarding the effect of posture adjustment on tongue movement during mastication, it was clarified that the smaller the angle of trunk tilt, the greater the tongue movement at the end of mastication. When performing masticatory training using CSM with trunk tilt, it is recommended to secure at least 45 degrees of the head position with respect to the horizontal plane.
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Free Research Field |
口腔リハビリテーション
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Academic Significance and Societal Importance of the Research Achievements |
本研究は摂食嚥下障害者に行うリハビリテーション時に行われる姿勢調整や訓練食品の物理的性状が咀嚼時舌運動に与える影響について超音波画像を用いて検討しました.嚥下訓練ではもっぱら誤嚥予防および適正な嚥下運動を促すために体幹傾斜を伴う姿勢調整が行われます.しかし,体幹傾斜が咀嚼時舌運動に与える影響は明らかではありません.本研究で用いた咀嚼開始食品(プロセスリード,大塚製薬工場)を用いた咀嚼では,少なくとも頭位は水平面に対して45度以上を確保することで,座位と同等の咀嚼運動時舌運動が再現され,咀嚼訓練において有用な知見が得られました.
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