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Muscle activity and muscle fatigue of the suprahyoid and infrahyoid muscles during supraglottic swallowing and super-supraglottic swallowing Tomoyuki Uematsu 1 , Risa Mitsuuchi 2 , Megumi Miyamoto 3 , Yuichi Ohtsuka 3 1Department of Speech and Language Therapy, Kochi Rehabilitation School 2Department of Rehabilitation, Faculty of Rehabilitation Studies, Kochi Professional University of Rehabilitation 3Department of Rehabilitation, Faculty of Health Science, Kumamoto Health Science University Keyword: 息こらえ嚥下法 , 強い息こらえ嚥下法 , 舌骨上筋群 , 舌骨下筋群 , 表面筋電計 , supraglottic swallowing , super-supraglottic swallowing , suprahyoid muscle , infrahyoid muscles , surface electromyography pp.141-150
Published Date 2022/6/15
DOI https://doi.org/10.11477/mf.6001200376
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 Dysphagia training includes exercising the supraglottic swallowing and super-supraglottic swallowing techniques. While these techniques are effective in preventing aspiration during swallowing, some subjects may complain of muscle fatigue and difficulty in swallowing. We hypothesized one of the reasons to be the excessive activity in the suprahyoid and infrahyoid muscles. Here, we tested this hypothesis and examined relevant points for providing a safer training. The results showed that muscle activity and swallowing difficulty were significantly higher for each of the swallowing techniques than for normal swallowing, and for super-supraglottic swallowing than for supraglottic swallowing (all p<0.001). Muscle fatigue was significantly observed in the infrahyoid muscles during the pharyngeal phase of supraglottic swallowing (p=0.02). In super-supraglottic swallowing, muscle fatigue was observed in the suprahyoid and infrahyoid muscles during the oral phase and in the suprahyoid muscles during the pharyngeal phase (p=0.003, p=0.002, and p=0.02). Therefore, when using these swallowing methods, it is necessary to consider muscle activity and muscle fatigue for deciding the amount of food intake, and it is important to gain proficiency in order to avoid causing excessive muscle activity.


Copyright © 2022, Japanese Association of Speech-Language-Hearing Therapists. All rights reserved.

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電子版ISSN 印刷版ISSN 1349-5828 日本言語聴覚士協会

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