US posterior glenohumeral joint

Deltoid: deltoid muscle; IS: infraspinatus; White star: glenoid labrum; Glenoid: glenoid of the scapula; Arrows: articular cartilage of the humeral head (anechoic structure); Humeral head: head of the humerus bone.
Left: medial; Right: lateral; Bottom of screen: deep; Top of screen: superficial.