The effect of Tongue-hold swallow on pharyngeal cavity

2021 Fiscal Year Final Research Report

• Project/Area Number: 20K23299
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Multi-year Fund
• Review Section: 0909:Sports sciences, physical education, health sciences, and related fields
• Research Institution: Fujita Health University
• Principal Investigator: AIHARA Keiko 藤田医科大学, 保健衛生学部, 助教 (00878366)
• Project Period (FY): 2020-09-11 – 2022-03-31
• Keywords: 摂食嚥下リハビリテーション / 摂食嚥下障害 / Dysphasia / Swallowing disorder / 舌 / 咽頭 / 前舌保持嚥下 / 320列面検出器型CT

Outline of Final Research Achievements

Purpose: The purpose of this study was to elucidate the effects of the tongue-hold swallow (THS) on the pharyngeal wall by quantifying posterior pharyngeal wall (PPW) anterior bulge during the THS. In addition, the effect of tongue protrusion length on the extent of pharyngeal wall anterior bulge was analyzed. Methods: Thirteen healthy subjects (6 males and 7 females, 23-43years) underwent 320-row area detector CT during saliva swallow (SS) and two types of THS（THS1/3 and THS2/3）. Length from cervical spine to PPW (PPW-AP) was measured and was compared between SS, THS1, and THS2. Results & Discussion: Compared to SS, PPW-AP in THS1 was significantly larger (p=0.04) and PPW-AP in THS 2 was not significantly different (p=0.09). This study demonstrated that the expanded pharyngeal cavity due to the tongue protrusion was completely obliterated by the increase of anterior motion of pharyngeal wall during THS.

Free Research Field

摂食嚥下リハビリテーション

Academic Significance and Societal Importance of the Research Achievements

本研究の結果から咽頭後壁の隆起量が増加することが定量的に示されたことで，単に咽頭収縮に対する訓練と定義されている前舌保持嚥下の効果がより明確となった．