Posterior Dislocation of the
Shoulder
1
Humeral
head (red
arrow) lies posterior to the glenoid fossa of the humerus (yellow arrow)
Humeral
head (red
arrow) lies beneath the acromion process of the scapula (green arrow) and posterior to glenoid (yellow oval)
Humeral
head (red
arrow) assumes the shape of a “lightbulb” because it is fixed in internal rotation