During impingement, which structures are involved with the supraspinatus between the greater tuberosity and which arch?

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Multiple Choice

During impingement, which structures are involved with the supraspinatus between the greater tuberosity and which arch?

Explanation:
Impingement involves pinching of the supraspinatus tendon as it passes beneath the roof of the subacromial space. This roof is formed by the coracoacromial arch, which sits above the greater tuberosity. When the arm elevates, the space under this arch can narrow, compressing the supraspinatus and surrounding structures. The coracoacromial arch consists of the acromion, the coracoid process, and the coracoacromial ligament, making it the relevant structure in this impingement scenario. The other structures listed do not form this roof or directly participate in this impingement mechanism.

Impingement involves pinching of the supraspinatus tendon as it passes beneath the roof of the subacromial space. This roof is formed by the coracoacromial arch, which sits above the greater tuberosity. When the arm elevates, the space under this arch can narrow, compressing the supraspinatus and surrounding structures. The coracoacromial arch consists of the acromion, the coracoid process, and the coracoacromial ligament, making it the relevant structure in this impingement scenario. The other structures listed do not form this roof or directly participate in this impingement mechanism.

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