ANATOMY: Forearm Flashcards
extensor carpi ulnaris
innervation
deep radial n.
brachioradialis:
attachments, function
o: lateral supracondyle of the humerus
i: lateral distal radius (does NOT cross wrist joint)
flexes the forearm (only placed in this compartment because of it’s innervation)
extensor pollicis brevis
attachments, function
o: posterior radius
i: base of proximal phalanx of thumb
extends thumb at CMC and MCP
what are the tendons that make up the anatomical snuff box?
extensor pollicis longus and extensor pollicis brevis
friend nerve to the radial a.
superficial radial n.
brachioradialis: innervation
where does this come from?
radial n.
terminal branch off the posterior cord
extensor digitorum
innervation, where does this come from?
deep radial n.
from radial n. (posterior cord terminal branch)
contents of the anatomical snuff box
radial a.
superficial radial n.
scaphoid/trapezium
flexor digitorum superficiales
attachment, function
o: medial epicondyle, anterior radius/ulna
i: MIDDLE phalanges of finger
flexes wrist, MCPs and PIPs
DOES NOT FLEX DIPs
the ________ __________ makes the roof of the carpal tunnel
flexor retunaculum
extensor carpi radialis brevis
attachments, function
o: lateral epicondyle humerus
i: dorsal surface of metacarpal
extends wrist, abducts hand (radial deviation)
flexor carpi ulnaris innervation
where does this come from?
ulnar n.
terminal branch of the medial cord of the brachial plexus
flexor carpi ulnaris
attachments, function
o: medial epicondyle
i: carpals (medial)
flexes wrist, adducts wrist (ulnar deviation)
pronator teres: innervation
where does this come from?
median n.
terminal branch of the medial and lateral cords of brachial plexus
flexor carpi radiales:
innervation? where does this come from?
median n.
a terminal branch off the medial and lateral cords
what tendons form the anatomical snuff box?
what are the contents?
extensor pollicis brevis, extensor pollicis longus
radial a.
superficial radial n.
scaphoid and trapezium
what is the friend nerve to the brachial artery?
median n.
palmaris longus
attachments? function?
o: medial epicondyle (anterior compartment)
i: palmar aponeurosis and flexor retinaculum
flexes the wrist and tenses the palmar aponeurosis
on radial deviation of the hand, you can palpate what bone (lateral)?
trapezium
what nerve goes through the carpal tunnel?
median n.
extensor carpi radialis longus
attachments, function
o: lateral supracondyle of humerus
i: DORSAL side of carpals (more lateral carpals)
extends hand, abducts hand (radial deviation)
flexor digitorum superficiales
innervation? where does this come from?
median n.
comes from the lateral and medial cords
flexor digitorum profundas
attachments, function
o: anterior ulna
i: DISTAL phalanges fingers
flexes wrist, flexes MCPs, PIPs, and DIPs
flexor pollicis longus
attachments, function
o: anterior radius
i: distal phalanx thumb
flexes MCP and IP of thumb (brings across palm)
palmaris longus
innervation? where does this come from?
median n.
terminal branch off the medial and lateral cords
flexor carpi radiales:
attachments, function
o: medial epicondyle
i: carpals
Flexes wrist, abducts wrist (radial deviation)
extensor pollicis longus
attachments, function
o: posterior ulna
i: base of distal phalanx of thumb
extends thumb at CMC, MCP, and IP
(ONLY one for IP of thumb)
what are the bones that form pillars for the carpal tunnel?
trapezium and scaphoid, pisiform and hamate
extensor carpi radialis brevis
innervation
deep radial n. (FIRST ONE innervated by deep radial n., right after it branches)
extensor carpi radialis longus
innervation? where does this come from?
radial n.
terminal branch of the posterior cord
what happens to the radial n. between the extensor carpi radialis braves and extensor carpi radials longus?
the radial n. branches into the superficial radian n. and deep radial n.
everything beyond here will be deep radial n.
extensor carpi ulnaris
attachments, function
o: lateral epicondyle, posterior ulna
i: base of 5th metacarpal (DORSAL)
extends wrist, adducts hand (ulnar deviation)
extensor digitorum
attachments, function
o: lateral epicondyle
i: distal AND middle phalanges of fingers (DORSAL SURFACE)
extends MCPs and IPs
on ulnar deviation of the hand, you can palpate what bone?
scaphoid
what tendons go through the carpal tunnel?
4 flexor digitorum superficiales tendons
4 flexor digitorum profundas tendons
flexor pollicis longus tendon
abductor pollicis longus
innervation, where does this come from?
deep radial n.
branch off the radial (a terminal branch of the posterior cord)
pronator teres:
attachments, function
o: medial epicondyle, proximal ulna
i: lateral mid shaft radius
flexes forearm and pronates hand
flexor pollicis longus
innervation where does this come from?
median n. (interosseous branch)
extensor pollicis brevis
innervation
deep radial n.
abductor pollicis longus
attachments, function
o: posterior radius/ulna
i: base of 1st metatarsal (thumb)
adducts thumb, extends thumb at CMC
supinator
attachments, function
o: lateral epicondyle, lateral ulna
i: radial shaft (anterior)
supinates forearm
flexor digitorum profundas
innervation? where does this come from?
median n. (ant. interosseous branch) and ulnar n.
ulnar n. comes from the medial cord of the brachial plexus
extensor pollicis longus innervation
deep radial n.
