Rodosky M W, Harner C D, Fu F H
Albert B. Ferguson, Jr., M.D., Laboratory for Orthopaedic Research, Department of Orthopaedic Surgery, University of Pittsburgh School of Medicine, Pennsylvania.
Am J Sports Med. 1994 Jan-Feb;22(1):121-30. doi: 10.1177/036354659402200119.
The authors conducted a study to determine if the long head of the biceps muscle and its attachment at the superior glenoid labrum play a role in stability of the shoulder in an overhead position. Their study used a dynamic cadaveric shoulder model that simulated the forces of the rotator cuff and long head of biceps muscles as the glenohumeral joint was abducted and externally rotated. Their data suggest that the long head of the biceps muscle contributes to anterior stability of the glenohumeral joint by increasing the shoulder's resistance to torsional forces in the vulnerable abducted and externally rotated position. The biceps muscle also helps to diminish the stress placed on the inferior glenohumeral ligament. Detachment of the superior glenoid labrum is detrimental to anterior shoulder stability as it decreases the shoulder's resistance to torsion and places a greater magnitude of strain on the inferior glenohumeral ligament.
作者开展了一项研究，以确定肱二头肌长头及其在肩胛盂上唇的附着点在肩部处于上举位时对肩部稳定性是否起作用。他们的研究使用了一个动态尸体肩部模型，该模型在盂肱关节外展和外旋时模拟了肩袖和肱二头肌长头的力量。他们的数据表明，肱二头肌长头通过增加肩部在易受损的外展和外旋位对扭力的抵抗力，有助于盂肱关节的前向稳定性。肱二头肌还有助于减轻下盂肱韧带所承受的应力。肩胛盂上唇的分离对肩部前向稳定性有害，因为它会降低肩部对扭转的抵抗力，并使下盂肱韧带承受更大的应变。
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