Trunk muscle geometry and centroid location when twisting

Y. H. Tsuang, G. J. Novak, O. D. Schipplein, A. Hafezi, J. H. Trafimow, G. B J Andersson

研究成果: 雜誌貢獻文章

22 引文 斯高帕斯(Scopus)

摘要

The trunk muscles of the lumbar region were studied using magnetic resonance imaging (MRI) in five male volunteers placed in neutral and in two twisted postures. Using a CAD digitizing system, the positions of trunk muscle centroids and the cross-sectional areas of these muscles were measured from the transverse scans at 1 cm intervals from L2 to S1. Muscle lines of action were created by connecting the muscle centroids from the successive sections. Changes in cross-sectional areas and displacements of centroids in a three-dimensional coordinate system and the local two-dimensional coordinate system were estimated at each disc level. In the three-dimensional coordinate system, all muscle centroids were displaced when twisting. Thus, the locations and orientations of all muscle lines of action changed. In the local two-dimensional coordinate system, only the muscle centroids of four abdominal muscles were displaced. Most of these displacements occurred in the first 25° of twisting. Higher up in the lumbar spine, the displacement was greater. The changes in moment arms were sometimes as great as twofold. Only the abdominal oblique muscle (AOM) changed their cross-sectional area significantly; the area of the right AOM ipsilateral to the side of twisting increased, while that of the left AOM was decreased.

原文英語
頁(從 - 到)537-546
頁數10
期刊Journal of Biomechanics
26
發行號4-5
DOIs
出版狀態已發佈 - 1993
對外發佈Yes

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine

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    Tsuang, Y. H., Novak, G. J., Schipplein, O. D., Hafezi, A., Trafimow, J. H., & Andersson, G. B. J. (1993). Trunk muscle geometry and centroid location when twisting. Journal of Biomechanics, 26(4-5), 537-546. https://doi.org/10.1016/0021-9290(93)90015-7