このエントリーをはてなブックマークに追加
ID 50683
フルテキストURL
著者
Kawakami, Shigehisa Okayama Univ, Dept Occlusal & Oral Funct Rehabil
Kodama, Naoki Okayama Univ, Dept Occlusal & Oral Funct Rehabil
Maeda, Naoto Okayama Univ, Dept Occlusal & Oral Funct Rehabil
Sakamoto, Shunichi Okayama Univ, Dept Occlusal & Oral Funct Rehabil
Oki, Kazuhiro Okayama Univ, Dept Occlusal & Oral Funct Rehabil
Yanagi, Yoshinobu Okayama Univ, Dept Oral & Maxillofacial Radiol
Asaumi, Jun-Ichi Okayama Univ, Dept Oral & Maxillofacial Radiol
Maeda, Teruta Osaka Dent Univ, Dept Postgrad Clin Training
Minagi, Shogo Osaka Dent Univ, Dept Postgrad Clin Training
抄録
The activity of the lateral pterygoid muscle has been regarded to be related to the pathological condition of the temporomandibular joint (TMJ) in the craniomandibular disorders. Because the lateral pterygoid muscle is a deep muscle, a needle electrode is necessary for EMG recordings. The purpose of this study was to establish a non-invasive method for the evaluation of muscle activity of the lateral pterygoid muscle using mechanomyogram (MMG). In three male subjects, surface electromyogram (EMG) in the left masseter muscle, left anterior and posterior belly of the temporal muscle, left anterior belly of the digastric muscle and needle EMG of the inferior head of the lateral pterygoid were recorded during mandibular movement tasks simultaneously with the MMG derived from a condenser microphone in the external ear canal. There were significant positive correlations between the needle EMG signal of the lateral pterygoid muscle and the MMG signal for the tasks of static jaw opened position of 30 mm of interincisal distance (p = 0.000, R(2)=0.725), static jaw opened position of 40 mm of interincisal distance (p = 0.000, R(2) = 0.753), 5 mm protruded mandibular position (p = 0.000, R(2) = 0.653), the most protruded mandibular position (p = 0.000, R(2) = 0803). On the contrary, for the task of maximal clenching, there was no significant correlation between the EMG signal of the lateral pterygoid muscle and the MMG signal. These results suggest that the activity of the lateral pterygoid muscle could be evaluated by the MMG signals recorded in the external ear canal, unless jaw closing major muscles show active contraction.
キーワード
Mechanomyogram
Electromyogram
Lateral pterygoid muscle
Jaw movement
発行日
2012-01-15
出版物タイトル
Journal of Neuroscience Methods
203巻
1号
出版者
Elsevier Science BV
開始ページ
157
終了ページ
162
ISSN
0165-0270
資料タイプ
学術雑誌論文
オフィシャル URL
http://dx.doi.org/10.1016/j.jneumeth.2011.09.026
関連URL
http://ousar.lib.okayama-u.ac.jp/metadata/50724
言語
English
OAI-PMH Set
岡山大学
著作権者
(C) 2011 Elsevier B.V. All rights reserved.
論文のバージョン
author
査読
有り
DOI
Web of Sience KeyUT