冈下肌和小圆肌这两块肌肉，将肩胛骨和上臂连接起来，使手臂外旋。
Two muscles, the infraspinatus and teres minor, connect the shoulder blade to the upper arm bone and roll the arms outward.
肩胛下动脉有恒定而发达的肌支至冈下肌，及一长的侧支至前臂筋膜张肌和臂三头肌长头；
The subscapular artery has a definite and strong branch to the infraspinatus muscle, and a long collateral branch to the long head of the triceps cervical and the tensor antebrachii.
结论：退变性肩袖撕裂大多数位于后方，临近冈上肌和岗下肌结合部。
Conclusions Degenerative rotator cuff tears most commonly involve a posterior location, near the junction of the supraspinatus and infraspinatus.
结论：退变性肩袖撕裂大多数位于后方，临近冈上肌和岗下肌结合部。
Conclusions Degenerative rotator cuff tears most commonly involve a posterior location, near the junction of the supraspinatus and infraspinatus.
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