Which movement at the shoulder is involved when turning a page?

Which movement at the shoulder is involved when turning a page?

• A. Flexion
• B. Extension
• C. Abduction
• D. Glenohumeral Rotation

Answer: (D)

Turning a page mainly involves rotating the upper arm at the shoulder joint. The shoulder’s glenohumeral joint allows the humerus to rotate around its long axis, which is the rotation you use when you flip or rotate the page with your hand. Flexion would move the arm forward, extension would move it backward, and abduction would lift the arm away from the body—none of which capture the primary action of turning a page as accurately as glenohumeral rotation.

Turning a page mainly involves rotating the upper arm at the shoulder joint. The shoulder’s glenohumeral joint allows the humerus to rotate around its long axis, which is the rotation you use when you flip or rotate the page with your hand. Flexion would move the arm forward, extension would move it backward, and abduction would lift the arm away from the body—none of which capture the primary action of turning a page as accurately as glenohumeral rotation.