In vivo cross-sectional area of human jaw muscles varies with section location and jaw position

T. K. Goto, M. Yahagi, Y. Nakamura, K. Tokumori, G. E.J. Langenbach, K. Yoshiura

研究成果: Contribution to journalArticle査読

25 被引用数 (Scopus)

抄録

Muscle cross-sectional area (CSA) is used as a measure for maximum muscle force. This CSA is commonly determined at one location within the muscle and for one jaw position. The purpose of this study was to establish a method to standardize the analysis of the CSA of the masticatory muscles in vivo, and to compare the CSAs along their entire length for two different jaw positions (opened and closed). The CSAs in the planes perpendicular to the long axes of the masseter, medial, and lateral pterygoid muscles were measured in ten normal young adult subjects by magnetic resonance imaging. Our results showed large differences among the muscles and a non-uniform change in CSA after jaw-opening. The method enables the CSA measurement to be standardized in vivo, and allows for a correct comparison of CSAs in different skull morphologies.

本文言語英語
ページ(範囲)570-575
ページ数6
ジャーナルJournal of Dental Research
84
6
DOI
出版ステータス出版済み - 6 2005

All Science Journal Classification (ASJC) codes

  • Dentistry(all)

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