UE Muscle Innervations

Question 1

What innervates the Trapezius muscle?

Answer 1

Spinal part of the accessory nerve (cranial nerve XII)

Question 2

What innervates the Latissimus Dorsi muscle?

Answer 2

Thoracodorsal

Question 3

What innervates the Levator Scapulae muscle?

Answer 3

Dorsal scapular nerve

Question 4

What innervates the Rhomboid Major and Minor muscles?

Answer 4

Dorsal scapular nerve

Question 5

What innervates the Serratus Posterior Superior muscle?

Answer 5

Intercostal nerves 2-5

Question 6

What innervates the Serratus Posterior Inferior muscle?

Answer 6

Intercostal nerves 9-12

Question 7

What innervates the Splenius Capitus muscle?

Answer 7

Dorsal rami of the cervical nerve

Question 8

What innervates the Erector Spinae (Iliocostalis, Longissimus, Spinalis) muscles?

Answer 8

Dorsal rami of the cervical, thoracic, and lumbar spinal nerves

Question 9

What innervates the Deltoid muscle?

Answer 9

Axillary nerve

Question 10

What innervates the Supraspinatus muscle?

Answer 10

Suprascapular nerve

Question 11

What innervates the Teres Minor muscle?

Answer 11

Axillary nerve (has a pseudoganglion)

Question 12

What innervates the Teres Major muscle?

Answer 12

Lower subscapular nerve

Question 13

What innervates the Subscapularis muscle?

Answer 13

Upper and lower subscapular nerves

Question 14

What innervates the Triceps (long head, lateral head, medial head) muscle?

Answer 14

Radial Nerve

Question 15

What innervates the Anconeus muscle?

Answer 15

Radial Nerve

Question 16

What innervates the Brachioradialis muscle?

Answer 16

Radial nerve (above the elbow)

Question 17

What innervates the Extensor Carpi Radialis Longus muscle?

Answer 17

Radial nerve (above the elbow)

Question 18

What innervates the Extensor Carpi Radialis Brevis muscle?

Answer 18

Deep branch of the radial nerve, posterior interosseous nerve (before piercing the supinator)

Question 19

What innervates the Extensor Digitorum muscle?

Answer 19

Deep branch of the radial nerve

Question 20

What innervates the Extensor Digiti Minimi muscle?

Answer 20

Deep branch of the radial nerve

Question 21

What innervates the Extensor Carpi Ulnaris muscle?

Answer 21

Deep branch of the radial nerve

Question 22

What innervates the Supinator muscle?

Answer 22

Deep branch of the radial nerve

Question 23

What innervates the Semi Spinalis muscle?

Answer 23

Dorsal rami of the spinal nerves

Question 24

What innervates the Abductor Pollicis Longus muscle?

Answer 24

Deep branch of the radial nerve

Question 25

What innervates the Extensor Pollicis Brevis muscle?

Answer 25

Deep branch of the radial nerve

Question 26

What innervates the Extensor Pollicis Longus muscle?

Answer 26

Deep branch of the radial nerve

Question 27

What innervates the Extensor Indicis muscle?

Answer 27

Deep branch of the radial nerve

Question 28

What innervates the Pectoralis Major muscle?

Answer 28

Medial and Lateral pectoral nerve

Question 29

What innervates the Pectoralis Minor muscle?

Answer 29

Medial pectoral nerve

Question 30

What innervates the Serratus Anterior muscle?

Answer 30

Long Thoracic Nerve (nerve of bell)

Question 31

What innervates the Biceps Brachii muscle?

Answer 31

Musculocutaneous nerve

Question 32

What innervates the Coracobrachialis muscle?

Answer 32

Musculocutaneous nerve

Question 33

What innervates the Brachialis muscle?

Answer 33

Major part by the musculocutaneous nerve and a small lateral part by the radial nerve

Question 34

What innervates the Pronator Teres muscle?

Answer 34

Median nerve

Question 35

What innervates the Flexor Carpi Radialis muscle?

Answer 35

Median Nerve

Question 36

What innervates the Palmaris Longus muscle?

Answer 36

Median Nerve

Question 37

What innervates the Flexor Carpi Ulnaris muscle?

Answer 37

Ulnar nerve

Question 38

What innervates the Flexor Digitorum Superficialis muscles?

Answer 38

Median Nerve

Question 39

What innervates the Flexor Pollicis Longus muscle?

Answer 39

Median nerve (anterior interosseous branch)

Question 40

What innervates the Flexor Digitorum Profundus muscle?

Answer 40

Medial part of the ulnar nerve and lateral part by the median nerve (anterior interosseous branch)

Question 41

What innervates the Pronator Quadratus muscle?

Answer 41

Median Nerve (anterior interosseous branch)

Question 42

What innervates the Flexor Pollicis Brevis muscle?

Answer 42

Median Nerve

Question 43

What innervates the Abductor Pollicis Brevis muscle?

Answer 43

Median Nerve

Question 44

What innervates the Opponens Pollicis muscle?

Answer 44

Median nerve

Question 45

What innervates the Flexor Digiti Minimi muscle?

Answer 45

Ulnar nerve

Question 46

What innervates the Abductor Digiti Minimi muscle?

Answer 46

Ulnar nerve

Question 47

What innervates the Opponens Digiti Minimi muscle?

Answer 47

Ulnar nerve

Question 48

What innervates the Palmaris Brevis muscle?

Answer 48

Ulnar nerve

Question 49

What innervates the Adductor Pollicis muscle?

Answer 49

Ulnar nerve and Median Nerve

Question 50

What innervates Lumbricals 1 and 2 (index and long finger) muscles?

Answer 50

Median Nerve

Question 51

What innervates Lumbricals 3 and 4 (ring and pinky) muscles?

Answer 51

ulnar nerve

Question 52

What innervates the Palmar and Dorsal Interossei muscles?

Answer 52

Ulnar nerve

Question 53

What Innervates the Infraspinatus muscle?

Answer 53

Suprascapular Nerve