Muscles that Position the Pectoral Girdle

Question 1

levator scapulae

Answer 1

elevates scapula

Question 2

pectoralis minor

Answer 2

depresses and protracts shoulder; rotates scapula so glenoid cavity moves inferiorily (downward rotation); elevates ribs if scapula is stationary

Question 3

rhomboid major/minor

Answer 3

adducts and performs downward rotation of the scapula

Question 4

serratus anterior

Answer 4

protracts shoulder; rotates scapula so glenoid cavity moves superiorily (upward rotation)

Question 5

trapezius

Answer 5

depends on active region and state of the other muscles; may elevate retract, depress, or rotate scapula and/or clavicle; can also extend neck

Question 5

Subclavius

Answer 5

Helps stabilize and depress pectoral girdle