Scapulothoracic Muscle Actions + Innervations

Question 1

upper trapezius innervation

Answer 1

spinal accessory nerve (cranial nerve XI)

Question 2

upper trapezius action

Answer 2

elevation and upward rotation of scapula

Question 3

middle trapezius innervation

Answer 3

spinal accessory nerve (cranial nerve XI)

Question 4

middle trapezius action

Answer 4

retraction of scapula

Question 5

lower trapezius innervation

Answer 5

spinal accessory nerve (cranial nerve XI)

Question 6

lower trapezius action

Answer 6

depression, retraction, and upward rotation of scapula

Question 7

levator scapulae innervation

Answer 7

dorsal scapular nerve

Question 8

levator scapulae action

Answer 8

elevation of scapula

Question 9

rhomboids (major + minor) innervation

Answer 9

dorsal scapular nerve

Question 10

rhomboids (major + minor) action

Answer 10

elevate, retraction, and downward rotation of scapula

Question 11

latissimus dorsi innervation

Answer 11

thoracodorsal nerve

Question 12

latissimus dorsi action

Answer 12

depression of scapula

Question 13

pectorals major innervation

Answer 13

lateral and medial pectoral nerves

Question 14

pectoralis major action

Answer 14

upward rotation of the scapula

Question 15

pectoralis minor innervation

Answer 15

medial pectoral nerve

Question 16

pectoralis minor action

Answer 16

depression and downward rotation of scapula

Question 17

subclavius innervation

Answer 17

subclavian nerve

Question 18

subclavius action

Answer 18

depression of clavicle

Question 19

serratus anterior innervation

Answer 19

long thoracic nerve

Question 20

serratus anterior action

Answer 20

protraction and upward rotation of scapula