In MMT for scapular abduction in gravity-minimized conditions, what is the test position?

In MMT for scapular abduction in gravity-minimized conditions, what is the test position?

• A. Standing with arm overhead
• B. Supine with the arm on the table
• C. Prone with the arm extended
• D. Sitting with upper arm resting on a table in 90 degrees of shoulder flexion and elbow extended

Answer: (D)

Gravity-minimized testing for scapular abduction focuses on isolating the serratus anterior by removing the weight of the arm from the movement. When the arm is supported, gravity no longer assists or resists the protraction of the scapula, so the patient can recruit the targeted muscle more purely. Positioning the patient seated with the upper arm resting on a table and the shoulder at about 90 degrees of flexion, with the elbow extended, achieves this. The arm’s weight is supported, the trunk and shoulder girdle are stabilized, and the scapula is free to protract (move forward) against minimal external load. This setup lets the serratus anterior act as the primary mover for scapular abduction, enabling an accurate assessment of its strength in a gravity-minimized context. Other positions would either introduce gravitational resistance or recruit additional muscles, making it harder to isolate the serratus anterior.

Gravity-minimized testing for scapular abduction focuses on isolating the serratus anterior by removing the weight of the arm from the movement. When the arm is supported, gravity no longer assists or resists the protraction of the scapula, so the patient can recruit the targeted muscle more purely.

Positioning the patient seated with the upper arm resting on a table and the shoulder at about 90 degrees of flexion, with the elbow extended, achieves this. The arm’s weight is supported, the trunk and shoulder girdle are stabilized, and the scapula is free to protract (move forward) against minimal external load. This setup lets the serratus anterior act as the primary mover for scapular abduction, enabling an accurate assessment of its strength in a gravity-minimized context.

Other positions would either introduce gravitational resistance or recruit additional muscles, making it harder to isolate the serratus anterior.