Unit 1 Muscles-Innervations

Front 1

splenius capitis

Back 1

Dorsal rami of spinal nerves
Why:Back muscles are innervated by dorsal rami of spinal nervers

Front 2

Splenius cervicis

Back 2

Dorsal rami of spinal nerves
Why:Back muscles are innervated by dorsal rami of spinal nervers

Front 3

Semispinalis capitis

Back 3

Dorsal rami of cervical spinal nerves

Why:Back muscles are innervated by dorsal rami of spinal nervers

Front 4

Erector spinae

Back 4

Dorsal rami of respective spinal nerves in each region
Why:Back muscles are innervated by dorsal rami of spinal nervers

Front 5

Serratus posterior superior

Back 5

2nd-5th intercostal nerves (anterior divisions of thoracic spinal nerves)

Front 6

Serratus posterior inferior

Back 6

Ventral primary rami of T9-T12 spinal nerves

Front 7

Trapezius

Back 7

Accesory nerve
(a crainial nerve)

Front 8

Latissimus dorsi
(named nerve and spinal nerve)

Back 8

Thoracodorsal
(branch off posterior cord C6,C7, C8)

Front 9

Rhomboid major
(terminal branch and spinal nerve)

Back 9

Dorsal scapular nerve
(a branch off the C5 ventral rami)

Front 10

Rhomboid minor
(terminal branch and spinal nerve)

Back 10

Dorsal scapular nerve,C5

Front 11

Levator scapulae
(terminal branch and spinal nerve)

Back 11

Dorsal scapular nerve (a branch off the C5 spinal ventral rami)

Front 12

Pectoralis major
(terminal branch and spinal nerve)

Back 12

med. pectoral C8, T1
lateral pectoral C5,6,7

Front 13

Pectoralis minor
(terminal branch and spinal nerve)

Back 13

Medial pectoral nerve, a branch off the medial cord supplied by C8 and T1

Front 14

Subclavius
(terminal branch and spinal nerve)

Back 14

Nerve to subclavius or subclavian, C5 and C6

Front 15

Serratus anterior
(terminal branch and spinal nerve)

Back 15

Long thoracic nerve C5,6,and 7

Front 16

Coracobrachialis
(terminal branch and spinal nerve)

Back 16

Musculocutaneous
A terminal branch of the lateral cord of the brachial plexus, supplied by spinal nerves C5,C6 and C7

Front 17

Deltoid
(terminal branch and spinal nerve)

Back 17

Axillary nerve
A terminal branch of the posterior cord of the brachial plexus supplied by spinal nerves C5 and C6

Front 18

Teres major
(terminal branch and spinal nerve)

Back 18

Lower subscapular nerver
A terminal branch off the posterior cord of the brachial plexus, supplied by C5 and C6

Front 19

Teres minor
(terminal branch and spinal nerve)

Back 19

Axillary nerve, C5, 6

Front 20

Subscapularis
(terminal branch and spinal nerve)

Back 20

Upper and lower subscapular nerves, both are branches off the posterior cord and are supplied by C5 and C6

Front 21

Infraspinatus

Back 21

Suprascapular C5,6

Front 22

supraspinatus
(terminal branch and spinal nerve)

Back 22

Suprascapular C5 and C6

Front 23

Brachialis
(terminal branch and spinal nerve)

Back 23

Musculocutaneous nerve C5,6,7

Front 24

Bicpes brachii
(terminal branch and spinal nerve)

Back 24

Musculocutaneous
A terminal branch off the lateral cord of the brachial plexus, supplied by C5,6,7

Front 25

Tricpes brachii
(terminal branch and spinal nerve)

Back 25

Radial nerve C5,6,7,8, T1

(note extensors are supplied by the radial nerve)

Front 26

Anconeous

Back 26

Radial nerve
(branch off the posterior cord, C5-T1
(note extensors/supinators are supplied by the radial nerve)

Front 27

Brachioradialis
(terminal branch and spinal nerve)

Back 27

Radial nerve
branch off the posterior cord,supplied by C5-T1
Note!! Even though this is a flexor of the forearm, the brachioradialis is innervated by the radial nerve because its origin is located in the posterior compartment
Hint: Brachioradialis Breaks the Rules, it is a flexor But Radial nerve innervated

Front 28

Supinator
(terminal branch and spinal nerve)

Back 28

Radial nerve C5-T1

Extensors/ supinators are innervated by the radial nerve
(Hint: Radically Extensive Soup)

Front 29

Pronator teres

Back 29

Median nerve C6-T1
Note: flexer/pronators are innverated by the median nerve (except brachioradialis which is the radial nerve

Front 30

Pronator quadratus

Back 30

Median nerve C6,7,8, T1

Note: flexer/pronators are innverated by the median nerve (except brachioradialis which is the radial nerve

Front 31

extensor carpi radialis longus

Back 31

Radial nerve
A terminal branch off the posterior cord suplied by C5-T1
Extensors/ supinators are innervated by the radial nerve
(Hint: Radically Extensive Soup)

Front 32

Extensor Carpi radialis brevis

Back 32

Radial nerve
A terminal branch off the posterior cord of the brachial plexsus, supplied by C5-T1. (extensor/supinator= radial nerve)

Front 33

Extensor carpi ulnaris

Back 33

Radial nerve C5,6,7,8, T1
(extensor/ supinator= radial nerve)

Front 34

Flexor Carpi Radialis

Back 34

Median nerve (terminal branch arising from lateral and medial cords, C6-T1
Note: median nerve does all flexors accept the Flexor carpi ulnaris and 1/2 of the flexor digitorum profundus

Front 35

flexor carpi ulnaris
(branch and spinal nerve)

Back 35

ulnar nerve C8, T1
Hint: This is one of the 1 1/2 forearm muscles that are supplied by the ulnar nerve. The 1/2 is the ulnar side of the flexor digitorum profundus

Front 36

palmaris longus
(branch and spinal nerve)

Back 36

median nerve, C6-T1
Hint:Although not in the name, palmaris longus is a flexor of the wrist so like the other flexors it is innervated by the meidan nerve

Front 37

Flexor digitorum superficialis
(branch and spinal nerve)

Back 37

median nerve C6-T1
Hint: Flexor/pronator= median

Front 38

Flexor digitorum profundus
(branch and spinal nerve)

Back 38

medial part= ulnar, lateral part= median (remember anatomic position)
Median nerve= C6-T1, ulnar nerve= C8, T1
Hint: This is one of the exceptions to the flexor/pronator=median group. 1/2 of this muscle is innervated by the ulnar nerve. The other exception is the flexor carpi ulnaris

Front 39

Extensor digitorum
(branch and spinal nerve)

Back 39

Radial nerve (branch off posterial cord, C5-T1)
Hint:Extensor/supinator = radial nerve

Front 40

Extensor indicis
(branch and spinal nerve)

Back 40

Radial (branch of posterior cord, C5-T1)
Hint: Extensor/supinator= radial

Front 41

Extensor digiti minimi
(branch and spinal nerve)

Back 41

Radial (branch of posterior, C5-T1)
Hint:extensor/supinator=radial

Front 42

Extensor pollicis longus
(branch and spinal nerve)

Back 42

Radial (branch of posterior cord, C5-T1)
Hint: extensor/supinator= radial

Front 43

Extensor pollicis brevis
(branch and spinal nerve)

Back 43

Radial (branch of posterior cord, C5-T1)
Hint: extensor/ supinator=radial

Front 44

Abductor pollicis longus
(branch and spinal nerve)

Back 44

Radial (branch off posterior cord, C5-T1)

Front 45

Flexor pollicis longus

Back 45

Median (union of lateral and medial cords, C6-T1)
Flexor/pronator= median

Front 46

lumbricals 1-2

Back 46

median nerve, C6,7,8 T1
Hint: 1/2 Med loaf
The intrinsic hand muscles that are innervated by the median nerve are Lumbricals 1 and 2, Opponens pollicis, ABductor pollicis brevis, Flexor Pollicis brevis, ALL others are innervated by the ulnar nerve

Front 47

lumbricals 3-4

Back 47

ulnar nerve (branch off medial cord, C8, T1)
Hint: all intrinsic hand muscles except the 1/2 med loaf's are ulnar nerve

Front 48

Dorsal interossei 1-4

Back 48

ulnar nerve (branch off medial cord, C8, T1)
Hint: all intrinsic hand muscles except the 1/2 med loaf's are ulnar nerve

Front 49

Palmar interossei 1-3

Back 49

ulnar nerve (branch off medial cord, C8, T1)
Hint: all intrinsic hand muscles except the 1/2 med loaf's are ulnar nerve

Front 50

Adductor pollicis

Back 50

ulnar nerve (branch off medial cord, C8, T1)
Hint: Do not confuse this with the Abductor pollicis brevis which is a med loaf, meat loaf will give your ABs a Short life
Hint: all intrinsic hand muscles except the 1/2 med loaf's are ulnar nerve

Front 51

Abductor pollicis brevis

Back 51

median nerve (lateral+medial cords, C6-T1)
Hint: 1/2 med LOAF muscle, meat loaf will give your abs a short life

Front 52

Flexor pollicis brevis

Back 52

median nerve (lateral+medial cords, C6-T1)
Hint: 1/2 med loaf intrinsic hand muscle

Front 53

Opponens pollicis

Back 53

median nerve C6-T1
Hint: 1/2 med loaf intrinsic hand muscle

Front 54

Abductor digiti minimi

Back 54

Ulnar (branch off medial cord, C8, T1)
Hint: All intrinsic hands that are not 1/2 med loaf are ulnar

Front 55

Flexor Digiti minimi brevis

Back 55

Ulnar (branch off medial cord, C8, T1)
Hint: All intrinsic hands that are not 1/2 med loaf are ulnar

Front 56

Opponens digiti minimi

Back 56

Ulnar (branch off medial cord, C8, T1)
Hint: All intrinsic hands that are not 1/2 med loaf are ulnar

Front 57

Palmaris brevis

Back 57

Ulnar C8, T1
Hint: All intrinsic hands that are not 1/2 med loaf are ulnar