1. (A) Normal AP view in internal rotation
(A) Normal AP view in internal rotation. The humeral head appears spherical but there is a normal amount of overlap of the humeral head on the glenoid fossa. (B) Posterior dislocation—Patient 6. Light bulb on a stick—the humeral head is internally rotated and has diminished overlap with the glenoid fossa (arrows). (C) Anterior dislocation.The humeral head is externally rotated and widely separated from the glenoid fossa. The humeral head is in a subcoracoid position, the most common location for an anterior dislocation.
Source: Chapter III-6. Posterior Shoulder Dislocation, Emergency Radiology: Case Studies
Citation: Schwartz DT. Emergency Radiology: Case Studies; 2008 Available at: Accessed: January 24, 2018
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