The short head of biceps arises by a thick, flat tendon from the apex of the coracoid process, sharing the origin with coracobrachialis. The conjoined tendon of short head biceps and coracobrachialis is a key landmark in the deltopectoral approach to the shoulder.
| Muscle | |
|---|---|
| Attachment | Tip of the coracoid process of the scapula |
Assists shoulder flexion and adduction and contributes to elbow flexion and supination
The short head biceps tendon, with coracobrachialis, forms the conjoined tendon that marks the medial boundary of the deltopectoral surgical approach to the shoulder and proximal humerus and is retracted medially. Coracoid impingement syndrome involves compression of the conjoined tendon and subscapularis between the coracoid and the lesser tubercle during shoulder flexion, adduction and internal rotation, and refractory cases may need coracoplasty. In the Latarjet procedure the coracoid graft is transferred with the conjoined tendon still attached, which adds a sling effect that helps hold the humeral head forward of the glenoid rim.
Compression of the short head biceps and coracobrachialis conjoined tendon between the coracoid process and the lesser tubercle in shoulder internal rotation, producing anterior shoulder pain with combined flexion, adduction, and internal rotation.
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