posterior forearm & UL joints Flashcards
innervation of all muscles of the posterior forearm
radial
names of the six superficial muscles lateral to medial
brachioradialis extensor carpi radialis longus extensor carpi radialis brevis extensor digitorum extensor digiti minimi extensor carpi ulnaris
what are the 6 superficial muscles attached onto
common extensor origin
extensor carpi radialis longus and brevis what do they attach to and what do they do
ECRP- 2nd metacarpal
brevis- 3rd metacarpal
extend and abduct the wrist
function of extensor digitorum
extends the digits via 4 long tendons that insert onto the dorsal aspect of the fingers
extensor carpi ulnaris role
extends and adducts the wrist
role of extensor retinaculum
prevents the wrist from bowing when the wrist is extended
role of extensor digiti minimi
extends the little finger
names of the 5 deep muscles lateral to medial
supinator abductor pollicis longus extensor pollicis brevis extensor pollicis longus extensor indicus
role of supinator
supination of forearm
role of abductor pollicis longus
abducts the thumb
role of extensor pollicis longus and brevis
extends the thumb
role of extensor indicis
extends the index finger
what happens in wrist drop
when the radial nerve is damaged
paralysis of the extensor muscles
dorsal venous drainage
cephalic laterally
basilic medially
what does the extensor hood do
fibrous structure over the dorsal aspect of digits
has two slips
central onto middle phalanx
marginal onto the distal phalanx
what is the anatomical snuffbox
a triangular shaped depression on the lateral aspect of the wrist
seen when the wrist is extended
boundaries of the snuff box
EPL medially
tendons of EPB and APL laterally
what does the snuff box contain
radial artery
radial nerve
cephalic vein
scaphoid
what does the superficial branch of the radial nerve innervate
skin over lateral part of dorsum hand, skin over anatomical snuff box
