In Yergason's Test, which motion is the patient instructed to perform against resistance?

In Yergason's Test, the patient is instructed to perform supination of the forearm alongside lateral rotation of the shoulder against resistance. This test is primarily used to evaluate the integrity of the biceps tendon and the stability of the long head of the biceps in the bicipital groove. While the patient is attempting to supinate and laterally rotate, the therapist applies resistance, typically at the wrist or forearm.

This dual action helps to assess whether there is any pain or tenderness that may indicate biceps tendon instability or other shoulder pathology. The focus on both supination and lateral rotation is essential to stress the biceps tendon in its functional position, highlighting any issues related to retracted structures or soft tissue injuries.

The other movements mentioned don't specifically target the biceps tendon and would not provide the same diagnostic information regarding the conditions Yergason's Test is designed to detect. Keeping the focus on the specific motions involved in the test helps clarify the functional aspects being assessed.