- Anatomy:
- coracoid process can be palpated thru anterior deltoid muscle one to two finger breadths below outer portion of clavicle;
- one finger breadth lateral to coracoid is the
GHJ;
- provides a palpable guide to deltopectoral groove;
- serves as an anchor for coracoid muscles (
coracobrachialis & short head of
biceps) that separate lateral safe side from medial side where
brachial plexus
and vessels lie;
- clavipectoral fascia covers the floor of deltopectoral groove and is identified by rotating humerus;
- this allows subscapularis to be identified beneath fascial layer;
- Role of CA Ligament:
-
attaches to the front and undersurface of the acromion as a thick band and continues around the anterolateral corner to attach to the lateral ridge for a variable distance.
- anteriorly, the coracoacromial ligament attaches to the anterior inferior edge of the acromion, while the deltoid fascia attaches more superiorly;
- upto 15 mm of motion may occur between the acromion and the coracoid, when subjected to a 30 kg distractive force;
Coracoid process transfer for acromioclavicular dislocations. A report of 20 cases.
The role of the coracoid process in the chronic impingement syndrome. Gerber, C., Terrier, F., and Ganz, R.: J. Bone Joint Surg. 67B:703, 1985.
Surgery about the coracoid: neurovascular structures at risk
The effect of coracoacromial ligament excision and acromioplasty on superior and anterosuperior glenohumeral stability.
Biomechanics of coracoacromial arch modification
Effect of coracoacromial ligament resection on glenohumeral stability under active muscle loading in an in vitro model.
