Which test is a labral test that involves shear forces to the labrum?

• A. Pronation Load
• B. Crank Test
• C. Dynamic Labral Sheer Test
• D. Neer Test

Answer: (C)

This test works by stressing the glenoid labrum with shear forces to reveal pathology. The labrum helps deepen the socket and stabilize the shoulder, but tearing it—especially a SLAP lesion—occurs when shear forces slide the labrum against the glenoid rim. The Dynamic Labral Shear Test is performed in a way that translates the humeral head across the glenoid, creating shear along the labral attachment. If a labral tear is present, this shearing motion typically reproduces pain, instability, or a clunk, helping to confirm labral involvement.

Other tests like the crank maneuver mainly combine compression with rotation to pressure the labrum, which can indicate a tear but isn’t defined by a primary shear mechanism along the labral margin. Neer’s test targets subacromial impingement rather than labral integrity, and the pronation load test is not a shoulder labral assessment.