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首页> 外文期刊>Journal of Biomechanics >The upper and lower segments of subscapularis muscle have different roles in glenohumeral joint functioning
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The upper and lower segments of subscapularis muscle have different roles in glenohumeral joint functioning

机译：亚腰面肌的上部和下部段在Glenohumeral关节功能中具有不同的作用

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Abstract Subscapularis muscle is divided into two independent segments, upper and lower (USUB and LSUB), but the role of each segment in glenohumeral functioning is unclear. We compared the electromyographic (EMG) activity of USUB and LSUB during a variety of shoulder movements, with and without an external translation force. Intramuscular electrodes were inserted in USUB and LSUB segments of 20 adults without pathology and EMG activity was measured in stabilization trials (with and without an anterior or posterior directed force at the humerus and isometric rotations) and two shoulder positions (shoulder neutral, abduction). Maximal voluntary isometric contraction (MVIC) trials were performed in abduction, internal and external rotation of the shoulder. In MVIC trials, USUB showed higher activity during internal rotation (p=0.03), whereas LSUB showed higher activity during external rotation (p
机译：摘要亚平板肌肌分为两个独立的段，上下（USUB和LSUB），但每个段在Glenohumer功能中的作用尚不清楚。 我们将USB和LSUB的肌电图（EMG）活性进行了比较了在各种肩部运动期间，有和没有外部翻译力。 在USB中插入肌肉内电极，在稳定试验中测量20个成人的LSUB段，并在稳定试验中测量（在肱骨和等距旋转处的前部或后线）和两个肩部位置（肩部中性，绑架）。 最大自愿等距收缩（MVIC）试验在肩部，内部和外部旋转中进行。 在MVIC试验中，USUB在内部旋转期间显示出更高的活动（P = 0.03），而LSUB在外部旋转期间显示出更高的活动（P

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