Final answer:
Scapular Y and Inferosuperior axial projections are used to evaluate the glenohumeral joint. The Transthoacic lateral is not typically used for this purpose. The correct answer is C. 1 and 2 only.
Step-by-step explanation:
The question is asking what projections or views may be used to evaluate the glenohumeral joint. Options presented include the Scapular Y projection, Inferosuperior axial, and Transthoacic lateral. The correct answer is C. 1 and 2 only, meaning the Scapular Y projection and Inferosuperior axial projection can be used to evaluate the glenohumeral joint. The Transthoacic lateral is not typically used for this joint's evaluation.
The glenohumeral joint is a ball-and-socket joint that allows for a wide range of motion. Given that it has a loose articular capsule and is supported by ligaments and the rotator cuff muscles, certain projections like the Scapular Y projection are beneficial to view the bone structures and ensure the rotator cuff muscles align and function correctly.