Muscle Nerve Innervation

Question 1

Latissimus Dorsi

Answer 1

Thoracodorsal nerve C6, C7, C8

Question 2

Trapezius

Answer 2

Spinal accessory nerve (CN XI) and Ventral Rami of C3, C4

Question 3

Levator Scapulae

Answer 3

cervical nerve C3, C4 and Dorsal Scpular nerve C4, C5

Question 4

Rhomboid minor

Answer 4

dorsal scapular nerve C4, C5

Question 5

Rhomboid major

Answer 5

dorsal scapular nerve C4, C5

Question 6

Deltoid

Answer 6

Axillary nerve C5, C6

Question 7

Pectoralis major (clavicular head)

Answer 7

Lateral and medial pectoral nerves C5, C6

Question 8

Pectoralis major (sternocostal head)

Answer 8

Lateral and medial pectoral nerves C7, C8, T1

Question 9

Pectoralis minor

Answer 9

medial pectoral nerve C8, T1 AND lateral pectoral nerve (variable)

Question 10

teres major

Answer 10

Lower subscapular nerve C5, C6

Question 11

Supraspinatus

Answer 11

suprascapular nerve C4, C5, C6

Question 12

infraspinatus

Answer 12

suprascapular nerve C5, C6

Question 13

teres minor

Answer 13

axillary nerve C5, C6

Question 14

subscapularis

Answer 14

upper and lower subscapular nerves C5, C6, C7

Question 15

serratus anterior

Answer 15

long thoracic nerve C5, C6, C7

Question 16

splenius capitis

Answer 16

posterior rami of spinal nerves

Question 17

splenius cervicis

Answer 17

posterior rami of spinal nerves

Question 18

erector spinae muscles (iliocostalis, longissimus, spinalis)

Answer 18

posterior rami of spinal nerves

Question 19

rotatores

Answer 19

posterior rami of spinal nerves

Question 20

multifidus

Answer 20

posterior rami of spinal nerves

Question 21

semispinalis capitis

Answer 21

cervical posterior rami of spinal cervical nerves

Question 22

Suboccipital Muscles

Answer 22

Suboccipital nerve (dorsal ramus of C1)

Question 23

sternocleidomastoid

Answer 23

spinal accessory nerve (CN XI) AND ventral rami of C3, C4 (pain / proprioceptive fibers)

Question 24

Platysma

Answer 24

cervical branch of facial nerve (CN VII)

Question 25

Psoas major

Answer 25

anterior (ventral) rami of L1, L2, L3

Question 26

Quadratus lumborum

Answer 26

ventral branches of T12, L1-L4

Question 27

rectus abdominis

Answer 27

thoraco-abdominal nerves (ventral rami of T6-T12)

Question 28

external oblique

Answer 28

thoraco-abdominal nerves of T7-T11

Question 29

internal oblique

Answer 29

thoraco-abdominal nerves (anterior rami of T6-T12 spinal nerves) AND first lumbar nerve

Question 30

transversus abdominis

Answer 30

thoraco-abdominal nerves (anterior rami of T6-T12 spinal nerves) AND first lumbar nerve

Question 31

diaphragm

Answer 31

phrenic nerve C3-5

Question 32

intercostals (external and internal)

Answer 32

thoracic intercostal nerves T1-T11