2024-03-28T11:42:54Z
https://niigata-u.repo.nii.ac.jp/oai
oai:niigata-u.repo.nii.ac.jp:02000652
2022-12-15T04:18:02Z
432:433:434
453:455
New method of recording the functional activity pattern of the buccinator from the mucosal surface
粘膜表面から頬筋の機能的活動パターンを記録する新規手法
Shiratori, Takami
白鳥, たかみ
New electrode
Buccinator muscle
Electromyography
Facial functions
Lip functions
新潟大学
Niigata University
博士(歯学)
Objectives: The buccinator (BUC) is an important muscle for oral function. Since it lies deep in the facial skin, recording its activity is difficult; thus, studies on its function are limited. We developed a method to access the deep facial muscles from the mucosal side. The aim of this study was to test the reliability of the new recording method for the BUC and to investigate the BUC behavior in typical facial functions. Methods: To evaluate the new method, BUC activities were recorded simultaneously with a gel-type electrode on the skin and the newly developed surface electrode on the buccal mucosa. Electromyographic (EMG) activities in function, such as chewing and swallowing, along with the activities of the lower orbicularis oris (OO), zygomaticus major, masseter, and digastric muscles, were compared using the two recording methods. EMG activities among various tasks were compared using normalized values based on those obtained during maximum lip closure (MaxLC). Results: The new surface electrode was made of gold plates on a thin plastic fixed to a stainless-steel wire frame and weighed less than 1 g. The BUC activity recorded from the mucosa was the highest during a corner-pulling task and was low during clenching. The BUC was active during MaxLC, similar to the OO, and the BUC activity pattern among tasks recorded from the mucosa was identical to that reported by previous studies using intramuscular electrodes. The new electrode evaluated the BUC activities quantitatively, and the recordings by the new electrode were free from contamination. Conclusions: The findings of this study confirmed the reliability of the new BUC recording method. It could be easily placed correctly within seconds, without the need for cleansing or sterilizing the skin. The BUC and OO were active during a MaxLC task, indicating that the BUC assists lip closure by pulling the corners of the mouth. The basic facial functions evaluated, including chewing, were similar to those studied by intramuscular electrodes.
Physiology & Behavior. 2021, 237, 113455.
新大博(歯)第192号
doctoral thesis
2022-03-23
application/pdf
application/pdf
乙第2264号
https://niigata-u.repo.nii.ac.jp/record/2000652/files/r3ndo192.pdf
https://niigata-u.repo.nii.ac.jp/record/2000652/files/r3ndo192_a.pdf
eng
https://doi.org/10.1016/j.physbeh.2021.113455
© 2021 Elsevier Inc. All rights reserved.
open access