Back muscles

Question 1

Action and innervation of trapezius

Answer 1

Rotate, retract, depress scapula, CN XI

Question 2

Action and innervation of latissimus dorsi

Answer 2

Extend, adduct, medially rotate shoulder, Thoracodorsal

Question 3

Action and innervation of rhomboids

Answer 3

Retract and rotate scapula, Dorsal scapular nerve

Question 4

Action and innervation of levator scapulae

Answer 4

Elevate and rotate scapula, Dorsal scapular

Question 5

Action and innervation of deltoid

Answer 5

Flex, abduct, extend, medially and laterally rotate shoulder, Axillary

Question 6

Action and innervation of teres major

Answer 6

Adduct, medially rotate humerus, Lower scapular