During testing of shoulder girdle with deltoid MMT, what stabilization is typically used?

During testing of shoulder girdle with deltoid MMT, what stabilization is typically used?

• A. Stabilize elbow, resist wrist
• B. Stabilize thorax/scapula with one hand; apply resistance to humerus with the other
• C. Stabilize contralateral shoulder, resist scapula
• D. No stabilization, resist shoulder

Answer: (B)

When testing the deltoid for shoulder abduction, the goal is to isolate the movement at the shoulder joint and prevent compensations from the scapulothoracic area and trunk. This is done by stabilizing the thorax and scapula with one hand to prevent scapular or trunk motion, while the other hand applies resistance to the humerus to challenge the deltoid as it attempts to abduct the arm. This setup ensures the strength reading reflects the deltoid’s ability to move the arm at the glenohumeral joint, not additional muscles that would kick in if the scapula or body moved. Stabilizing the elbow or resisting the wrist wouldn’t control the scapula, and stabilizing a contralateral shoulder or no stabilization would allow compensations. Hence, stabilizing the thorax/scapula and applying resistance to the humerus is the standard approach.

When testing the deltoid for shoulder abduction, the goal is to isolate the movement at the shoulder joint and prevent compensations from the scapulothoracic area and trunk. This is done by stabilizing the thorax and scapula with one hand to prevent scapular or trunk motion, while the other hand applies resistance to the humerus to challenge the deltoid as it attempts to abduct the arm. This setup ensures the strength reading reflects the deltoid’s ability to move the arm at the glenohumeral joint, not additional muscles that would kick in if the scapula or body moved. Stabilizing the elbow or resisting the wrist wouldn’t control the scapula, and stabilizing a contralateral shoulder or no stabilization would allow compensations. Hence, stabilizing the thorax/scapula and applying resistance to the humerus is the standard approach.