Watanabe Koji, Otsuki Satoru, Hisa Takushi, Nagaoka Masanori
Juntendo Tokyo Koto Geriatric Medical Center, Japan.
Department of Rehabilitation Medicine, Juntendo University Graduate School, Japan.
J Phys Ther Sci. 2016 May;28(5):1511-7. doi: 10.1589/jpts.28.1511. Epub 2016 May 31.
[Purpose] The tendinous inscription divides the semitendinosus muscle into the proximal and distal compartments. It was hypothesized that there are functional differences between those compartments. [Subjects and Methods] Seven adult males performed knee flexion and hip extension in the prone position. An ultrasound device measured the decrease in the length of muscle fibers in the two compartments during these movements. The knee and hip joint angles were concurrently measured using a video camera. Pearson's correlation coefficients were calculated between the decrease in muscle fiber length in each compartment and joint angle. [Results] During knee flexion, decreased muscle fiber length was significantly correlated with increased knee flexion angle. During hip extension, there were no significant correlations for either compartment. Only the decrease in muscle fiber length in the distal compartment during hip extension tended to be negative; the other decreases in muscle fiber length tended to be positive. [Conclusion] Correlations did not reveal any functional differences. However, only the distal compartment elongated during hip extension. This result might show a functional difference and could be applied in clinical contexts during hip extension.
[目的] 腱划将半腱肌分为近端和远端部分。据推测，这些部分之间存在功能差异。[对象与方法] 7名成年男性在俯卧位进行膝关节屈曲和髋关节伸展动作。使用超声设备测量这些动作过程中两个部分肌纤维长度的缩短情况。同时使用摄像机测量膝关节和髋关节角度。计算每个部分肌纤维长度缩短与关节角度之间的Pearson相关系数。[结果] 在膝关节屈曲过程中，肌纤维长度缩短与膝关节屈曲角度增加显著相关。在髋关节伸展过程中，两个部分均无显著相关性。仅在髋关节伸展过程中，远端部分肌纤维长度的缩短趋于负值；其他肌纤维长度的缩短趋于正值。[结论] 相关性分析未显示出任何功能差异。然而，仅在髋关节伸展时远端部分会延长。这可能表明存在功能差异，并且可应用于髋关节伸展时的临床情况。
