Muscles of forearm

Question 1

Anconeus

Answer 1

Lateral epicondyle of humerus, posterior capsule of elbow joints
–>
prox 1/4 of ulna, lateral oledcranon of ulna

action
elbow extension

Question 2

Pronator quadratus

Answer 2

distal 1/4 ant ulnar
–>
distal 1/4 ant radius

actions
pronation
stabilisation of DRUJ

Question 3

Supinator

Answer 3

lateral epicondyle of humerus, supinarot crest and fossa and radial collateral and annular ligaments
–>
posterior, lateral and anterior aspects of proximal radius

forearm supination

Question 4

flexor carpi radialis
(FCR)

Answer 4

common flexor origin
–>
bases of metacaprals 2 and 3

action
wrist abduction
wrist flexion

Question 5

Palmaris longus

Answer 5

common flexor origin
–>
flexor retinaculum, palmar aponeurosis

tighten the palmar aponeurosis
(weak wrist flexion)

Question 6

flexor digitorum superficialis
(FDS)

Answer 6

common flexor origin on medial epicondyle of humerus, ulnar collateral ligament, coronoid process of ulna
–>
bases of middle phalanges of digits 2 - 5

wrist flexion
finger flexion of PIPJ and MCPJ

Question 7

Flexor carpi ulnaris

Answer 7

common flexor origin, olecranon process, prox 2/3 of ulna shaft
–>
hook of hamate and base of MC 5

wrist adduction
wrist flexion

Question 8

flexor digitorum profundus

Answer 8

coronoid process of ulna, prox 3/4 ulna, middle 1/3 interosseous membrane
–>
bases of distal phalanx digits 2/5

wrist flexion DIPJ and proximal joints flexion

Question 9

flexor pollicis longus

Answer 9

Anterior surface of radius, adjacent interosseous membrane
–>
base of distal phalanx of thumb

thumb flexion and opposition

Question 10

Extensor carpi radialis longus

Answer 10

lateral supracondylar ridge
–>
base of mc 2

wrist abduction
wrist extension

Question 11

extensor carpi radialise brevis

Answer 11

common extensor tendon
–>
base of MC 3

wrist abduction and extension

Question 12

extensor digitorum

Answer 12

common extensor origin
–>
DDE of middle and distal pahalnges digits 2-5

finger and wrist extension
slight finger abduction

Question 13

extensor digiti minimi

Answer 13

common extensor origin
–>
DDE of digit 5

LF Extension

Question 14

Extensor carpi ulnaris

Answer 14

common extensor origin, posterior border of ulna
–>
base of MC 5

wrist extension and adduction

Question 15

Abductor pollicis longus

Answer 15

proximal posterior ulna, middle 1/3 post radius
–>
base of MC 1

thumb abduction and extension

Question 16

Extensor pollicis longus

Answer 16

middle 1/3 posterior ulna
–>
base of proximal phalanx of thumb

thumb extension

Question 17

extensor pollicis brevis

Answer 17

middle part of posterior radius, adjacent interosseous membrane
–>
base of proximal phalanx of thumb

thumb extension

Question 18

extensor indicis

Answer 18

distal posterior ulna, adjacent membrane
–>
DDE of digit 2

IF extension