A: Neil Evans – “With all of the special tests you have to look at the collaboration of all of them put together. There is a labral crank test as well as the crank test in the literature. Technically both can provide you with information about instability but the labral crank test is for the labrum while the apprehension test is for anterior instability.” Learn more about this, and other related topics in the course “Differential Diagnosis for Musculoskeletal Assessment for the Upper Extremity”.