What is the primary purpose of the Yergason's Test?

The primary purpose of the Yergason's Test is to evaluate the integrity of the bicipital tendon. This test is specifically designed to assess the stability and condition of the biceps tendon located within the bicipital groove of the humerus. During the test, resistance is applied while the patient tries to supinate the forearm, which places stress on the tendon and allows the clinician to see if there is any pain or instability. If the biceps tendon is intact and healthy, the patient should be able to perform the movement without discomfort.

While the other options relate to other aspects of shoulder and elbow function, they do not correctly capture the focus of Yergason's Test. Assessing for shoulder dislocation involves different mechanisms and tests that specifically look for joint instability. Testing for supraspinatus strength involves other specific tests such as the Empty Can Test, which directly targets that rotator cuff muscle. Measuring the range of motion of the elbow is outside the scope of Yergason's Test, as it specifically targets the shoulder and biceps tendon rather than the elbow joint itself.