The short head of biceps has a coracoid origin, making it vulnerable to coracoid impingement and coracobrachialis-related compression. Its coracoid attachment is just medial to the coracoacromial ligament.
| Origin | Coracoid process of the scapula — tip, shared with coracobrachialis |
|---|---|
| Insertion | Radial tuberosity and bicipital aponeurosis — same insertion as long head |
| Nerve Supply | Musculocutaneous nerve (C5, C6) |
| Blood Supply | Brachial artery |
| Actions | Flexes the elbow; Supinates the forearm; Flexes the shoulder — both heads contribute equally |
|---|
The short head origin at the coracoid is one of the structures compressed in subcoracoid impingement syndrome. In Latarjet coracoid transfer, the conjoined tendon (short head biceps + coracobrachialis) is transferred with the coracoid to the anterior glenoid, using the conjoined tendon as a sling to prevent shoulder dislocation.
Palpated as the medial biceps belly during resisted elbow flexion.
Conjoined tendon of biceps short head and coracobrachialis transferred with the coracoid to the anterior glenoid as a dynamic sling preventing anterior shoulder dislocation.
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