What is the fulcrum for the Shoulder Abduction test?

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Multiple Choice

What is the fulcrum for the Shoulder Abduction test?

Explanation:
The axis of rotation for shoulder abduction is best approximated at the anterior edge of the acromion. Placing the fulcrum there aligns the goniometer with the glenohumeral joint’s rotation as the arm moves away from the body, giving an accurate measure of true abduction. Using a landmark like the lateral acromion can shift the axis and include more scapulothoracic motion, which can skew the angle. The midline of the sternum is used to guide the stationary arm, not the fulcrum, and a posterior scapular landmark would not align with the humeral rotation during abduction.

The axis of rotation for shoulder abduction is best approximated at the anterior edge of the acromion. Placing the fulcrum there aligns the goniometer with the glenohumeral joint’s rotation as the arm moves away from the body, giving an accurate measure of true abduction. Using a landmark like the lateral acromion can shift the axis and include more scapulothoracic motion, which can skew the angle. The midline of the sternum is used to guide the stationary arm, not the fulcrum, and a posterior scapular landmark would not align with the humeral rotation during abduction.

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