Which muscles depress the scapula?

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Study for the Muscle Actions and Functions – Anatomy and Movement Test. Equip yourself with multiple choice questions, each with detailed explanations and hints. Prepare confidently for your exam!

Multiple Choice

Which muscles depress the scapula?

Explanation:
Depressing the scapula means pulling the shoulder blade downward toward the ribs. The primary movers for this are the lower fibers of the trapezius and the pectoralis minor. The lower trapezius, with fibers that reach toward the inferior angle and scapular spine, pulls the bottom of the scapula downward and slightly inward. Pectoralis minor attaches to ribs 3–5 and to the coracoid process; its contraction tilts the scapula downward, lowering the glenoid fossa. When these two muscles contract together, they produce a clear downward movement of the scapula. Serratus anterior mainly protracts the scapula and upwardly rotates it, so it isn’t a primary depressor.

Depressing the scapula means pulling the shoulder blade downward toward the ribs. The primary movers for this are the lower fibers of the trapezius and the pectoralis minor. The lower trapezius, with fibers that reach toward the inferior angle and scapular spine, pulls the bottom of the scapula downward and slightly inward. Pectoralis minor attaches to ribs 3–5 and to the coracoid process; its contraction tilts the scapula downward, lowering the glenoid fossa. When these two muscles contract together, they produce a clear downward movement of the scapula.

Serratus anterior mainly protracts the scapula and upwardly rotates it, so it isn’t a primary depressor.

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