ID | 50683 |
フルテキストURL | |
著者 |
Maeda, Naoto
Okayama Univ, Dept Occlusal & Oral Funct Rehabil
Sakamoto, Shunichi
Okayama Univ, Dept Occlusal & Oral Funct Rehabil
Maeda, Teruta
Osaka Dent Univ, Dept Postgrad Clin Training
Minagi, Shogo
Osaka Dent Univ, Dept Postgrad Clin Training
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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.
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キーワード | Mechanomyogram
Electromyogram
Lateral pterygoid muscle
Jaw movement
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発行日 | 2012-01-15
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出版物タイトル |
Journal of Neuroscience Methods
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巻 | 203巻
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号 | 1号
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出版者 | Elsevier Science BV
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開始ページ | 157
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終了ページ | 162
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ISSN | 0165-0270
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資料タイプ |
学術雑誌論文
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オフィシャル URL | http://dx.doi.org/10.1016/j.jneumeth.2011.09.026
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関連URL | http://ousar.lib.okayama-u.ac.jp/metadata/50724
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言語 |
英語
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著作権者 | (C) 2011 Elsevier B.V. All rights reserved.
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論文のバージョン | author
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査読 |
有り
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DOI | |
Web of Science KeyUT |