Characteristics of the Lower Limb Skeletal Muscle Stiffness in Healthy Individuals : Analysis of Muscle Stiffness with Ultrasonographic Elastography

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  • Kawamichi Koji
    Department of Rehabilitation Medicine, National Hospital Organization Ehime Medical Center
  • Yamaguchi Tetsuo
    Faculty of Integrated Arts and Sciences, Tokushima University
  • Miyawaki Suzuko
    Department of Rehabilitation Medicine, National Hospital Organization Tokushima Hospital
  • Okamoto Kazuhisa
    Department of Rehabilitation Medicine, National Hospital Organization Tokushima Hospital
  • Uemura Naoko
    Department of Rehabilitation Medicine, National Hospital Organization Takamatsu Medical Center
  • Takata Shinjiro
    Department of Rehabilitation Medicine, National Hospital Organization Tokushima Hospital

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Other Title
  • 健常者の下肢骨格筋における筋硬度の特性
  • 健常者の下肢骨格筋における筋硬度の特性 : 超音波エラストグラフィを応用した筋硬度の解析
  • ケンジョウシャ ノ カシ コッカクキン ニ オケル キン コウド ノ トクセイ : チョウオンパ エラストグラフィ オ オウヨウ シタ キン コウド ノ カイセキ
  • ―超音波エラストグラフィを応用した筋硬度の解析―

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Abstract

<p>Objective：To investigate the lower limb skeletal muscle stiffness in healthy individuals.</p><p>Methods：Using ultrasonographic elastography, we measured the degree of stiffness of the rectus femoris and medial head of the gastrocnemius in healthy individuals and investigated the relationships between muscle stiffness and thickness, a quantitative measure of muscles, and between muscle stiffness and brightness, a qualitative measure of muscles. Furthermore, relationships between muscle stiffness and age, body weight, and body mass index (BMI) were also studied.</p><p>Results：Rectus femoris stiffness was positively correlated with muscle thickness. Rectus femoris stiffness had a weak negative correlation with muscle brightness and a weak positive correlation with body weight and BMI. Stiffness of the medial head of the gastrocnemius showed no correlation with any of the study variables. Muscle stiffness did not correlate with age in either of the muscles. No sex-related difference was found in the degree of muscle stiffness.</p><p>Conclusion：Although rectus femoris stiffness was associated with muscle thickness and brightness, these relationships were not observed for muscle stiffness of the medial head of the gastrocnemius. The data suggested that rectus femoris stiffness reflects the quantitative and qualitative states of the muscle, and the presence of such relationships may depend on the location of the muscle.</p>

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