posterior forearm & UL joints

Question 1

innervation of all muscles of the posterior forearm

Answer 1

radial

Question 2

names of the six superficial muscles lateral to medial

Answer 2

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

Question 3

what are the 6 superficial muscles attached onto

Answer 3

common extensor origin

Question 4

extensor carpi radialis longus and brevis what do they attach to and what do they do

Answer 4

ECRP- 2nd metacarpal
brevis- 3rd metacarpal
extend and abduct the wrist

Question 5

function of extensor digitorum

Answer 5

extends the digits via 4 long tendons that insert onto the dorsal aspect of the fingers

Question 6

extensor carpi ulnaris role

Answer 6

extends and adducts the wrist

Question 7

role of extensor retinaculum

Answer 7

prevents the wrist from bowing when the wrist is extended

Question 8

role of extensor digiti minimi

Answer 8

extends the little finger

Question 9

names of the 5 deep muscles lateral to medial

Answer 9

supinator
abductor pollicis longus
extensor pollicis brevis
extensor pollicis longus
extensor indicus

Question 10

role of supinator

Answer 10

supination of forearm

Question 11

role of abductor pollicis longus

Answer 11

abducts the thumb

Question 12

role of extensor pollicis longus and brevis

Answer 12

extends the thumb

Question 13

role of extensor indicis

Answer 13

extends the index finger

Question 14

what happens in wrist drop

Answer 14

when the radial nerve is damaged

paralysis of the extensor muscles

Question 15

dorsal venous drainage

Answer 15

cephalic laterally

basilic medially

Question 16

what does the extensor hood do

Answer 16

fibrous structure over the dorsal aspect of digits
has two slips
central onto middle phalanx
marginal onto the distal phalanx

Question 17

what is the anatomical snuffbox

Answer 17

a triangular shaped depression on the lateral aspect of the wrist
seen when the wrist is extended

Question 18

boundaries of the snuff box

Answer 18

EPL medially

tendons of EPB and APL laterally

Question 19

what does the snuff box contain

Answer 19

radial artery
radial nerve
cephalic vein
scaphoid

Question 20

what does the superficial branch of the radial nerve innervate

Answer 20

skin over lateral part of dorsum hand, skin over anatomical snuff box