What is the primary action of the levator scapulae?

What is the primary action of the levator scapulae?

• A. Elevates and inferiorly rotates the scapula
• B. Depresses the scapula
• C. Protracts the scapula
• D. Retracts the scapula

Answer: (A)

Levator scapulae is best understood as a scapular elevator. Its fibers pull the scapula upward toward the neck, which is its primary action. In addition to lifting, it can contribute to downward (inferior) rotation of the scapula, helping position the glenoid cavity for arm movements when the shoulder girdle is stabilized by other muscles. Depressing the scapula is done mainly by other muscles, protracting by serratus anterior, and retracting by rhomboids and middle trapezius, so those actions don’t describe this muscle’s primary role.

Levator scapulae is best understood as a scapular elevator. Its fibers pull the scapula upward toward the neck, which is its primary action. In addition to lifting, it can contribute to downward (inferior) rotation of the scapula, helping position the glenoid cavity for arm movements when the shoulder girdle is stabilized by other muscles. Depressing the scapula is done mainly by other muscles, protracting by serratus anterior, and retracting by rhomboids and middle trapezius, so those actions don’t describe this muscle’s primary role.