Coracobrachialis Bursa

bursa musculi coracobrachialis

The coracobrachialis bursa is an inconstant small bursa at the medial shoulder joint, between the subscapularis and coracobrachialis in the subcoracoid space. When present and inflamed it contributes to the subcoracoid impingement syndrome, where the subscapularis tendon and adjacent bursae are compressed between the coracoid process and the lesser tubercle during internal rotation and forward flexion.

Region: Shoulder

Biomechanics

Function & Actions

Reduces friction between the subscapularis and the medial coracobrachialis during shoulder movements

Clinical Relevance

Clinical Notes

Subcoracoid impingement involving the coracobrachialis bursa produces anterior shoulder pain that worsens with internal rotation and forward flexion — distinct from the lateral pain of subacromial impingement. MRI shows fluid in the subcoracoid space and a narrow coracohumeral distance (less than 8 mm) confirming the subcoracoid pathology.

Pathology

Common Injuries & Conditions

Subcoracoid Impingement

Subscapularis and bursal compression in the coracohumeral space producing anterior shoulder pain with internal rotation, managed with physiotherapy and injection, occasionally requiring coracoplasty.