What does a positive result from the Drop Arm Test indicate?

A positive result from the Drop Arm Test specifically indicates a torn rotator cuff. This test assesses the integrity of the rotator cuff muscles, particularly the supraspinatus tendon, which is crucial for shoulder stabilization and movement.

During the test, the patient is instructed to abduct their arm to shoulder height and then slowly lower it. If the arm drops suddenly or the patient is unable to control the descent, it suggests that there is a significant tear in the rotator cuff, particularly indicating a supraspinatus tear. This mechanism of injury is common among individuals who engage in repetitive overhead activities or those who have experienced trauma to the shoulder.

Understanding the underlying anatomy and function of the rotator cuff is essential for recognizing why this test is reliable for diagnosing tears. The other options, while related to shoulder conditions, do not specifically correlate with the result of this test. A fractured clavicle, shoulder dislocation, and arthritic joint have different clinical presentations and diagnostic criteria.