Muscles Of The Upper Extremities - Innervation

Front 1

Trapezius: Upper, Middle, and Lower

Back 1

Accessory n (CNXI) spinal part (motor)

C3 - C4 spinal ns

Front 2

Levator Scapula

Back 2

Dorsal Scapular n (C5), C3 - C4 spinal ns

Front 3

Rhomboid Major

Back 3

Dorsal Scapular n (C4 - C5)

Front 4

Rhomboid Minor

Back 4

Dorsal Scapular n (C4 -C5)

Front 5

Serratus Anterior

Back 5

Long Thoracic n (C5 - C7)

Front 6

Pectoralis Major

Back 6

Clavicular Head: Lateral and Medial Pectoral ns (C5 - C6)

Sternocostal Head: Medial Pectoral ns (C7 - T1)

Front 7

Pectoralis Minor

Back 7

Medial Pectoral n (C8 - T1)

Front 8

Subclavius

Back 8

Subclavian n (C5 - C6)

Front 9

Latissimus Dorsi

Back 9

Thoracodorsal n (C6 - C8)

Front 10

Supraspinatus

Back 10

Suprascapular n (C4 - C6)

Front 11

Infraspinatus

Back 11

Suprascapular n (C5-C6)

Front 12

Teres Minor

Back 12

Axillary n (C5 - C6)

Front 13

Teres Major

Back 13

Lower Subscapular n (C5 - C6)

Front 14

Subscapularis

Back 14

Upper and Lower Subscapular ns (C5 - C7)

Front 15

Deltoids: Anterior, Middle, and Posterior

Back 15

Axillary n (C5 - C6)

Front 16

Coracobrachialis

Back 16

Musculocutaneous n (C5 - C7)

Front 17

Biceps Brachii

Back 17

Musculocutaneous n (C5 - C6)

Front 18

Brachialis

Back 18

Musculocutaneous n (C5 - C6)

Front 19

Triceps Brachii

Back 19

Radial n (C6 - C8)

Front 20

Anconeus

Back 20

Radial n (C7 - T1)

Front 21

Flexor Carpi Radialis

Back 21

Median n (C6 - C7)

Front 22

Flexor Carpi Ulnaris

Back 22

Ulnar n (C7 - C8)

Front 23

Palmaris Longus

Back 23

Median n (C7 - C8)

Front 24

Pronator Teres

Back 24

Median n (C6 - C7)

Front 25

Pronator Quadratus

Back 25

Median n (C8 - T1)

Front 26

Flexor Digitorum Superficialis

Back 26

Median n (C7 - T1)

Front 27

Flexor Digitorum Profundus

Back 27

Radial 2 fingers: Median n (C8 - T1)

Ulnar 2 fingers: Ulnar n (C8 - T1)

Front 28

Flexor Pollicis Longus

Back 28

Median n (C8 - T1)

Front 29

Brachioradialis

Back 29

Radial n (C5 - C7)

Front 30

Extensor Carpi Radialis Longus

Back 30

Radial n (C6 - C7)

Front 31

Extensor Carpi Radialis Brevis

Back 31

Radial n (C6 - C7)

Front 32

Extensor Carpi Ulnaris

Back 32

Radial n (C7 - C8)

Front 33

Extensor Digitorum

Back 33

Radial n (C6 - C8)

Front 34

Extensor Digiti Minimi

Back 34

Radial n (C7 - C8)

Front 35

Supinator

Back 35

Radial n (C7 - C8)

Front 36

Extensor Indicis

Back 36

Radial n (C7 - C8)

Front 37

Abductor Pollicis Longus

Back 37

Radial n (C7 - C8)

Front 38

Extensor Pollicis Longus

Back 38

Radial n (C7 - C8)

Front 39

Extensor Pollicis Brevis

Back 39

Radial n (C7 - C8)

Front 40

Abductor Pollicis Brevis

Back 40

Median n (C8 - T1)

Front 41

Flexor Pollicis Brevis

Back 41

Superficial Head: Median n (C8 - T1)

Deep Head: Ulnar n (C8 - T1)

Front 42

Opponens Pollicis

Back 42

Median n (C8 - T1)

Front 43

Adductor Pollicis

Back 43

Ulnar n (C8 - T1)

Front 44

Flexor Digiti Minimi Brevis

Back 44

Ulnar n (C8 - T1)

Front 45

Opponens Digiti Minimi

Back 45

Ulnar n (C8 - T1)

Front 46

Abductor Digiti Minimi

Back 46

Ulnar n (C8 - T1)

Front 47

Lumbricals

Back 47

Radial 2 fingers: Median n (C8 - T1)

Ulnar 2 fingers: Ulnar n (C8 - T1)

Front 48

Palmar Interossei

Back 48

Ulnar n (C8 - T1)

Front 49

Dorsal Interossei

Back 49

Ulnar n (C8 - T1)