In the drop arm test interpretation, what does inability to control descent suggest?

In the drop arm test interpretation, what does inability to control descent suggest?

• A. Rotator cuff tear.
• B. Labral tear.
• C. Biceps tendinopathy.
• D. AC joint separation.

Answer: (A)

The drop arm test examines how well the rotator cuff can eccentrically control the arm when it’s lowered from a raised position, especially focusing on the supraspinatus. When the arm is abducted to about 90 degrees, the rotator cuff muscles hold the humeral head steady as you slowly lower the arm. If there is a rotator cuff tear, the weakened tendon cannot control that lowering, and the arm drops abruptly or can’t be lowered smoothly. That inability to control descent points to a rotator cuff tear as the most likely issue. Other conditions, like labral problems, biceps tendinopathy, or AC joint injury, cause different symptoms or test results (pain with specific movements, instability, or joint-specific pain) rather than a failure to eccentrically control lowering from 90 degrees.

The drop arm test examines how well the rotator cuff can eccentrically control the arm when it’s lowered from a raised position, especially focusing on the supraspinatus. When the arm is abducted to about 90 degrees, the rotator cuff muscles hold the humeral head steady as you slowly lower the arm. If there is a rotator cuff tear, the weakened tendon cannot control that lowering, and the arm drops abruptly or can’t be lowered smoothly. That inability to control descent points to a rotator cuff tear as the most likely issue. Other conditions, like labral problems, biceps tendinopathy, or AC joint injury, cause different symptoms or test results (pain with specific movements, instability, or joint-specific pain) rather than a failure to eccentrically control lowering from 90 degrees.