Upper Limb 4 - Station 1

Question 1

6 muscles of superficial posterior forearm

Answer 1

brachioradialis
extensor carpi radialis longus
extensor carpi radialis brevis
extensor digitorum
extensor digiti minimi
extensor carpi ulnaris

Question 2

cord origin of radial nerve

Answer 2

posterior cord

Question 3

roots of posterior cord

Answer 3

C5-T1

Question 4

action of extensor carpi radialis longus and brevis

Answer 4

extension and abduction of the wrist

Question 5

innervation of extensor carpi radialis longus

Answer 5

radial nerve

Question 6

innervation of extensor carpi radialis brevis

Answer 6

deep branch of radial nerve

Question 7

common innervation of all posterior forearm muscles

Answer 7

branches of radial nerve

Question 8

attachments of brachioradialis

Answer 8

lateral supracondylar ridge of humerus to lateral distal end of radius

Question 9

action of brachioradialis

Answer 9

weak elbow flexion that is strongest in mid prone position

Question 10

innervation of brachioradialis

Answer 10

radial nerve

Question 11

action of extensor digitorum

Answer 11

extends wrist and medial four fingers at MCP and IP joints

Question 12

tendon of extensor digitorum passes under/over the extesor retinaculum

Answer 12

under

Question 13

innervation of extensor digitorum

Answer 13

posterior interossesus nerve (radial nerve)

Question 14

action of extensor digiti minimi

Answer 14

extends wrist and pinky finger at MCP and IP joints

Question 15

action of extensor carpi ulnaris

Answer 15

extends and adducts wrist

Question 16

muscles that extend of abduct the thumb

Answer 16

abductor pollicis longus
extensor pollicis longus
extensor pollicis brevis

Question 17

deep layer of posterior forearm muscles

Answer 17

supinator

Question 18

action of supinator

Answer 18

supinates forearm

Question 19

innervation of supinator

Answer 19

deep branch of radial nerve

Question 20

muscles innervated by the posterior interosseus nerve (radial)

Answer 20

extensor digitorum, extensor digiti minimi and extensor carpi ulnaris (most medial 3 superficial) and outcropping deep

Question 21

superficial posterior forearm muscles from lateral to medial

Answer 21

brachioradialis
extensor carpi radialis longus
extensor carpi radialis brevis
extensor digitorum
extensor digiti minimi
extensor carpi ulnaris

Question 22

“outcropping” deep muscles of posterior forearm

Answer 22

abductor pollicis longs
extensor pollicis longus
extensor pollicis brevis
extensor indicis

Question 23

innervation of all “outcropping” deep muscles

Answer 23

posterior interosseus nerve (radial)

Question 24

what bone do all the “outcropping” deep muscles attach to proximally

Answer 24

radius

Question 25

order of the “outcropping” deep muscles from lateral to medial

Answer 25

abductor pollicis longus
extensor pollicis brevis
extensor pollicis longus
extensor indicis

Question 26

which muscle extends the thumb at the distal phalanx

Answer 26

extensor pollicis longus

Question 27

which muscles extends the thumb at the proximal phalanx

Answer 27

extensor pollicis brevis