Change in EMG activity of the orbicularis oris muscle in relation to configuration of a plate within the labial vestibule during lip closure

• Published in: The Japanese Journal of Dysphagia Rehabilitation Vol. 10; no. 2; pp. 135 - 141
• Main Authors: WADA, Takeshi, TACHIMURA, Takashi, NOHARA, Kanji, SASAO, Yasuhiro
• Format: Journal Article
• Language: Japanese
• Published: The Japanese Society of Dysphagia Rehabilitation 31.08.2006; 一般社団法人 日本摂食嚥下リハビリテーション学会
• Subjects: electromyography; lip; orbicularis oris; 口唇; 口輪筋; 筋電図; 訓練
• ISSN: 1343-8441; 2434-2254
• DOI: 10.32136/jsdr.10.2_135

【Objectives】The aim of this study was to examine whether orbicularis oris muscle (OOM) activity during lip closure might be changed in relation to the thickness of a plate inserted into the labial vestibule (lip-plate)．【Methods】Five normal adults participated in this study．Lip-plates were fabricated for each subject with a tailor-made basis in their width and height while the thickness of the lip-plate was adjusted as follows：5.0mm，7.5mm，10.0mm，12.5mm， 15.0mm and 17.5mm．Each subject was directed to keep the lips closed tightly with the lip-plate in place．Smoothed EMG signals of the upper and lower OOM were collected during lip closure．【Results】OOM activity was correlated with changes in thickness of the lip-plate in place．The characteristics of changes in the activity were not different between the lower and upper lips．【Conclusion】The OOM could be changed in accordance with the thickness of the lip-plate．It is suggested that lip function might be improved by means of a tailor-made lip-plate for person with dysphagia due to lip closing dysfunction．