Which muscle inserts on the scapular spine?

Which muscle inserts on the scapular spine?

• A. Trapezius
• B. Latissimus dorsi
• C. Rhomboid major
• D. Levator scapulae

Answer: (A)

The scapular spine is a key attachment site for the trapezius. This large, superficial back muscle has fibers that reach different parts of the scapula, and the portion that anchors to the spine specifically helps stabilize and move the scapula, contributing to its retraction and upward rotation when coordinated with the other fibers. The other muscles listed attach elsewhere: latissimus dorsi to the humerus, rhomboid major to the medial border of the scapula, and levator scapulae to the superior angle/medial border. So the muscle that inserts on the scapular spine is the trapezius.

The scapular spine is a key attachment site for the trapezius. This large, superficial back muscle has fibers that reach different parts of the scapula, and the portion that anchors to the spine specifically helps stabilize and move the scapula, contributing to its retraction and upward rotation when coordinated with the other fibers. The other muscles listed attach elsewhere: latissimus dorsi to the humerus, rhomboid major to the medial border of the scapula, and levator scapulae to the superior angle/medial border. So the muscle that inserts on the scapular spine is the trapezius.