Static (anatomic) stabilizers of glenohumeral joint

Glenohumeral ligaments

There are three GHL's which are thickenings of glenohumeral joint capsule and are important passive stabilizers of the glenohumeral joint. 

SGHL

Runs from superior aspect of the glenoid and coracoid process to the superior part of the lesser tuberosity of the humerus at the medial edge of the intertubercular fossa. SGHL stabilizes biceps brachii tendon. 

MGHL

MGHL is just posterior to subscapularis tendon. 

IGHL

Sometimes refered to IGHL complex. IGHL is composed of three parts: anterior band, posterior band and axillary pouch (laxity between anterior and posterior bands)