This test should be performed bilaterally to compare stability of both right and left shoulder joints.
[1][full citation needed] The patient is to lie supine on the table.
[2][1] The examiner applies a posterior force to the humeral head and externally rotates the patients humerus.
The examiner applies a posterior force to the humeral head and externally rotates the patients humerus.
[1] A decrease in pain or apprehension or an increase in range of motion is a positive sign for anterior instability.