Question

What elbow anatomy is best demonstrated on the AP oblique projection in 45-degree medial rotation?

Select one:
a.Radial head and capitulum
b.Superimposed humeral epicondyles and open elbow joint
c.Olecranon process in profile
d.Coronoid process of the ulna and the trochlea

Answer 1

On an AP oblique projection in 45-degree medial rotation, the coronoid process of the ulna and the trochlea are best demonstrated as the arm positioning moves the radial head out of the way for clear visualization.

Correct option is A

Step-by-step explanation:

The elbow anatomy that is best demonstrated on the AP oblique projection in 45-degree medial rotation is the coronoid process of the ulna and the trochlea. This projection specifically presents a view where the medial epicondyle of the humerus and the olecranon process are no longer superimposed, allowing the coronoid process and the trochlea to be viewed without obstruction.

The positioning of the arm in this projection ensures that the radial head is moved away from the ulna, presenting a clear view of these structures.