Posterior Compartment Forearm Muscles

Front 1

6 superficial muscles of posterior forearm

Back 1

Brachioradialis

Extensor carpi radialis longus

Extensor carpi radialis brevis

Extensor digitorum

Extensor digiti minimi

Extensor carpi ulnaris

Front 2

5 deep muscles of the posterior forearm

Back 2

Supinator

Abductor pollicis longus

Extensor pollicis brevis

Extensor pollicis longus

Extensor indicis

Front 3

Proximal attachment of the Brachioradialis

Back 3

Humerus - lateral supra-epicondylar ridge

Front 4

Distal attachment of the Brachioradialis

Back 4

Radius (distal) - lateral surface

Front 5

Innervation of the Brachioradialis

Back 5

Radial nerve

Front 6

Action of the Brachioradialis

Back 6

Elbow flexion

Front 7

Proximal attachment of the Extensor carpi radialis longus

Back 7

Humerus - lateral supra-epicondylar ridge

Front 8

Distal attachment of the Extensor carpi radialis longus

Back 8

2nd metacarpal - base

Front 9

Innervation of the Extensor carpi radialis longus

Back 9

Radial nerve

Front 10

Action of the Extensor carpi radialis longus

Back 10

Wrist extension & radial deviation

Front 11

Muscles that attach to the common extensor tendon on the lateral epicondyle

Back 11

Extensor carpi radialis brevis

Extensor digitorum

Extensor digiti minimi

Extensor carpi ulnaris

Front 12

Proximal attachment of the Extensor carpi radialis brevis

Back 12

Humerus - lateral epicondyle

Front 13

Distal attachment of the Extensor carpi radialis brevis

Back 13

3rd metacarpal - base

Front 14

Innervation of the Extensor carpi radialis brevis

Back 14

Deep branch of the radial nerve

Front 15

Action of the Extensor carpi radialis brevis

Back 15

Wrist extension & radial deviation

Front 16

Proximal attachment of the Extensor digitorum

Back 16

Humerus - lateral epicondyle

Front 17

Distal attachment of the Extensor digitorum

Back 17

Medial 4 digits - extensor expansions

Front 18

Innervation of the Extensor digitorum

Back 18

Deep branch of the radial nerve

Front 19

Action of the Extensor digitorum

Back 19

Medial 4 digits metacarpophalangeal joint extension

(medial 4 digits interphalangeal joint extension)

(wrist extension)

Front 20

Proximal attachment of the Extensor digiti minimi

Back 20

Humerus - lateral epicondyle

Front 21

Distal attachment of the Extensor digiti minimi

Back 21

5th digit - extensor expansion

Front 22

Innervation of the Extensor digiti minimi

Back 22

Deep branch of the radial nerve

Front 23

Action of the Extensor digiti minimi

Back 23

5th digit metacarpophalangeal joint extension

(5th digit interphalangeal joint extension)

(wrist flexion)

Front 24

Proximal attachment of the Extensor carpi ulnaris

Back 24

Humerus - lateral epicondyle

Ulna (proximal-middle) - posterior border

Front 25

Distal attachment of the Extensor carpi ulnaris

Back 25

5th metacarpal - base

Front 26

Innervation of the Extensor carpi ulnaris

Back 26

Deep branch of radial nerve

Front 27

Action of the Extensor carpi ulnaris

Back 27

Wrist extension & ulnar deviation

Front 28

Proximal attachment of Supinator

Back 28

Humerus - lateral epicondyle

Radial collateral ligament

Annular ligament

Ulna - Supinator fossa

Ulna - Supinator crest

Front 29

Distal attachment of the Supinator

Back 29

Radius (proximal) - lateral, posterior, and anterior surfaces

Front 30

Innervation of the Supinator

Back 30

Deep branch of the radial nerve

Front 31

Action of the Supinator

Back 31

Forearm supination

Front 32

Proximal attachment of the Abductor pollicis longus

Back 32

Ulna (proximal-middle) - posterior surface

Radius (proximal-middle) - posterior surface

Interosseous membrane

Front 33

Distal attachment of the Abductor pollicis longus

Back 33

1st metacarpal - base

Front 34

Innervation of the Abductor pollicis longus

Back 34

Posterior interosseous nerve from the deep branch of radial nerve

Front 35

Action of the Abductor pollicis longus

Back 35

Thumb carpometacarpal joint abduction & extension

Front 36

Proximal attachment of the Extensor pollicis brevis

Back 36

Radius (distal) - posterior surface

Interosseous membrane

Front 37

Distal attachment of the Extensor pollicis brevis

Back 37

Thumb - proximal phalanx - base

Front 38

Innervation of the Extensor pollicis brevis

Back 38

Posterior interosseous nerve from deep branch of radial nerve

Front 39

Action of the Extensor pollicis brevis

Back 39

Thumb metacarpophalangeal & carpometacarpal joint extension

Front 40

Proximal attachment of the Extensor pollicis longus

Back 40

Ulna (middle) - posterior surface

Interosseous membrane

Front 41

Distal attachment of the Extensor pollicis longus

Back 41

Thumb - distal phalanx - base

Front 42

Innervation of the Extensor pollicis longus

Back 42

Posterior interosseous nerve from deep branch of radial nerve

Front 43

Action of the Extensor pollicis longus

Back 43

Thumb interphalangeal, metacarpophalangeal, & carpometacarpal joint extension

Front 44

Proximal attachment of the Extensor indicis

Back 44

Ulna (distal) - posterior surface

Interosseous membrane

Front 45

Distal attachment of the Extensor indicis

Back 45

2nd digit - extensor expansion

Front 46

Innervation of the Extensor indicis

Back 46

Posterior interosseous nerve from the deep branch of radial nerve

Front 47

Action of the Extensor indicis

Back 47

2nd digit metacarpophalangeal joint extension

(2nd digit interphalangeal joint extension)

(wrist extension)