ANATOMY: Forearm

Question 1

extensor carpi ulnaris

innervation

Answer 1

deep radial n.

Question 2

brachioradialis:

attachments, function

Answer 2

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)

Question 3

extensor pollicis brevis

attachments, function

Answer 3

o: posterior radius
i: base of proximal phalanx of thumb

extends thumb at CMC and MCP

Question 4

what are the tendons that make up the anatomical snuff box?

Answer 4

extensor pollicis longus and extensor pollicis brevis

Question 5

friend nerve to the radial a.

Answer 5

superficial radial n.

Question 6

brachioradialis: innervation

where does this come from?

Answer 6

radial n.

terminal branch off the posterior cord

Question 7

extensor digitorum

innervation, where does this come from?

Answer 7

deep radial n.

from radial n. (posterior cord terminal branch)

Question 8

contents of the anatomical snuff box

Answer 8

radial a.
superficial radial n.
scaphoid/trapezium

Question 9

flexor digitorum superficiales

attachment, function

Answer 9

o: medial epicondyle, anterior radius/ulna
i: MIDDLE phalanges of finger

flexes wrist, MCPs and PIPs
DOES NOT FLEX DIPs

Question 10

the ________ __________ makes the roof of the carpal tunnel

Answer 10

flexor retunaculum

Question 11

extensor carpi radialis brevis

attachments, function

Answer 11

o: lateral epicondyle humerus
i: dorsal surface of metacarpal

extends wrist, abducts hand (radial deviation)

Question 12

flexor carpi ulnaris innervation

where does this come from?

Answer 12

ulnar n.

terminal branch of the medial cord of the brachial plexus

Question 13

flexor carpi ulnaris

attachments, function

Answer 13

o: medial epicondyle
i: carpals (medial)

flexes wrist, adducts wrist (ulnar deviation)

Question 14

pronator teres: innervation

where does this come from?

Answer 14

median n.

terminal branch of the medial and lateral cords of brachial plexus

Question 15

flexor carpi radiales:

innervation? where does this come from?

Answer 15

median n.

a terminal branch off the medial and lateral cords

Question 16

what tendons form the anatomical snuff box?

what are the contents?

Answer 16

extensor pollicis brevis, extensor pollicis longus

radial a.
superficial radial n.
scaphoid and trapezium

Question 17

what is the friend nerve to the brachial artery?

Answer 17

median n.

Question 18

palmaris longus

attachments? function?

Answer 18

o: medial epicondyle (anterior compartment)
i: palmar aponeurosis and flexor retinaculum

flexes the wrist and tenses the palmar aponeurosis

Question 19

on radial deviation of the hand, you can palpate what bone (lateral)?

Answer 19

trapezium

Question 20

what nerve goes through the carpal tunnel?

Answer 20

median n.

Question 21

extensor carpi radialis longus

attachments, function

Answer 21

o: lateral supracondyle of humerus
i: DORSAL side of carpals (more lateral carpals)

extends hand, abducts hand (radial deviation)

Question 22

flexor digitorum superficiales

innervation? where does this come from?

Answer 22

median n.

comes from the lateral and medial cords

Question 23

flexor digitorum profundas

attachments, function

Answer 23

o: anterior ulna
i: DISTAL phalanges fingers

flexes wrist, flexes MCPs, PIPs, and DIPs

Question 24

flexor pollicis longus

attachments, function

Answer 24

o: anterior radius
i: distal phalanx thumb

flexes MCP and IP of thumb (brings across palm)

Question 25

palmaris longus innervation? where does this come from?

Answer 25

median n. terminal branch off the medial and lateral cords

Question 26

flexor carpi radiales: attachments, function

Answer 26

o: medial epicondyle i: carpals Flexes wrist, abducts wrist (radial deviation)

Question 27

extensor pollicis longus attachments, function

Answer 27

o: posterior ulna i: base of distal phalanx of thumb extends thumb at CMC, MCP, and IP (ONLY one for IP of thumb)

Question 28

what are the bones that form pillars for the carpal tunnel?

Answer 28

trapezium and scaphoid, pisiform and hamate

Question 29

extensor carpi radialis brevis innervation

Answer 29

deep radial n. (FIRST ONE innervated by deep radial n., right after it branches)

Question 30

extensor carpi radialis longus innervation? where does this come from?

Answer 30

radial n. terminal branch of the posterior cord

Question 31

what happens to the radial n. between the extensor carpi radialis braves and extensor carpi radials longus?

Answer 31

the radial n. branches into the superficial radian n. and deep radial n. *everything beyond here will be deep radial n.*

Question 32

extensor carpi ulnaris attachments, function

Answer 32

o: lateral epicondyle, posterior ulna i: base of 5th metacarpal (DORSAL) extends wrist, adducts hand (ulnar deviation)

Question 33

extensor digitorum attachments, function

Answer 33

o: lateral epicondyle i: distal AND middle phalanges of fingers (DORSAL SURFACE) extends MCPs and IPs

Question 34

on ulnar deviation of the hand, you can palpate what bone?

Answer 34

scaphoid

Question 35

what tendons go through the carpal tunnel?

Answer 35

4 flexor digitorum superficiales tendons 4 flexor digitorum profundas tendons flexor pollicis longus tendon

Question 36

abductor pollicis longus innervation, where does this come from?

Answer 36

deep radial n. branch off the radial (a terminal branch of the posterior cord)

Question 37

pronator teres: attachments, function

Answer 37

o: medial epicondyle, proximal ulna i: lateral mid shaft radius flexes forearm and pronates hand

Question 38

flexor pollicis longus innervation where does this come from?

Answer 38

median n. (interosseous branch)

Question 39

extensor pollicis brevis innervation

Answer 39

deep radial n.

Question 40

abductor pollicis longus attachments, function

Answer 40

o: posterior radius/ulna i: base of 1st metatarsal (thumb) adducts thumb, extends thumb at CMC

Question 41

supinator attachments, function

Answer 41

o: lateral epicondyle, lateral ulna i: radial shaft (anterior) supinates forearm

Question 42

flexor digitorum profundas innervation? where does this come from?

Answer 42

median n. (ant. interosseous branch) and ulnar n. ulnar n. comes from the medial cord of the brachial plexus

Question 43

extensor pollicis longus innervation

Answer 43

deep radial n.