Pectoral Muscles Review Quiz

What is the primary function of the pectoralis minor muscle?

• To extend the forearm

• To rotate the humerus laterally

• To elevate the scapula

• To stabilize the scapula by pulling it inferiorly and anteriorly

Where does the subclavius muscle originate?

• On the medial border of the scapula

• On the lateral lip of the intertubercular sulcus

• On the first rib at the junction with the costal cartilage

• On the anterior surface of the sternum

Which muscle is responsible for protracting the scapula?

• Subclavius

• Pectoralis major

• Pectoralis minor

• Serratus anterior

What is the action of the clavicular head of the pectoralis major?

• It extends the humerus

• It flexes the humerus

• It rotates the scapula downward

• It abducts the humerus

Which muscle assists in the medial rotation of the humerus?

• Pectoralis minor

• Subclavius

• Serratus anterior

• Pectoralis major