Rigakuryoho Kagaku
Online ISSN : 2434-2807
Print ISSN : 1341-1667
Original Article
Changes in Muscle Thicknesses of the Trunk Muscles with Posture
Yoshiaki ENDOKo ONODAAkira KUBO
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JOURNAL FREE ACCESS

2017 Volume 32 Issue 4 Pages 527-530

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Abstract

[Purpose] The purpose of this study was to examine how multiple local muscles work in different postures. [Subjects and Methods] The subjects were 28 healthy young men (mean age: 22.4±1.9 years old). Muscle thicknesses of the right side of the second and fifth lumbar multifidus [LM(L2), LM(L5)], erector spinae (ES), transversus abdominis (TrA), internal oblique (IO), and external oblique (EO) muscles were evaluated in different postures using an ultrasound imaging system. [Results] The muscle thickness of LM(L2) significantly increased, the most in the recumbent position and the least in the standing position. The muscle thickness of LM(L5) significantly increased, the most in the standing position. The muscle thicknesses of ES, TrA, and IO significantly increased, more in the sitting and standing positions than in the recumbent position. However, there were no significant changes in the muscle thickness of EO. [Conclusions] The results suggest that each trunk muscle has individual characteristics of trunk muscle thickness variation with changes in posture.

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© 2017 by the Society of Physical Therapy Science
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