Swallowing rehabilitation by peripheral magnetic stimulation of the suprahyoid muscles synchronized with swallowing reflex

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K11311
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 59010:Rehabilitation science-related
• Research Institution: Fujita Health University
• Principal Investigator: Kagaya Hitoshi 藤田医科大学, 医学部, 教授 (40282181)
• Co-Investigator(Kenkyū-buntansha): 青柳 陽一郎 日本医科大学, 大学院医学研究科, 大学院教授 (30286661) ; 稲本 陽子 藤田医科大学, 保健学研究科, 教授 (70612547)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 摂食嚥下障害 / 末梢磁気刺激 / 嚥下反射

Outline of Final Research Achievements

We synchronized the peripheral magnetic stimulation of the suprahyoid muscles with the swallowing reflex. The electromyography of the sternohyoid muscle during swallowing reflex was used as a trigger of the magnetic stimulation. The significant increases were observed in the anterior maximum movement distance of the hyoid bone and opening width of the upper oesophageal sphincter. In addition, we clarified the differences in muscle activities of the anterior belly of digastric, sternohyoid, masseter, temporal, and sternocleidomastoid muscles between discrete swallowing and chew-swallowing.

Free Research Field

リハビリテーション医学

Academic Significance and Societal Importance of the Research Achievements

高齢者の摂食嚥下障害への対策は重要である．摂食嚥下障害では嚥下反射中の舌骨挙上が障害されることが多い．磁気刺激を用いて舌骨を疼痛なく挙上させることができ，嚥下反射と同期させることで，舌骨挙上，食道入口部開大をより大きくすることができた．摂食嚥下障害の新たな治療法の開発に目処がついた．また，１口嚥下と咀嚼嚥下という異なる嚥下様式における筋活動の違いを明らかにできたことで両者の生理的差異がより理解できるようになった．