Forearm: Nerves & Arteries

Question 1

axillary artery

Answer 1

Course: descends from the first rib inferiorly to teres major where it becomes the “brachial”
Relations:
branch of the subclavina, parent of the brachial
compass of brachial plexus
Injury: without collateral circulation from the suprascapular artery collaterals and the deep brachial artery, the entire arm would die

Question 2

brachial artery

Answer 2

Course: descends from the teres major and deep to the bicipital aponeurosis, distal to which it bifurcates into radial artery which runs superficially and the ulnar artery which
Relations:
branch of the axillary, parent radial and ulnar
superificial to the biceps brachii, dep to brachialis

Injury: forearm problems?

Question 3

profunda brachii artery

Answer 3

Course: branch of the axillary artery that descends posteriorly along the radial groove and forms collaterals with branches of the suprascapular artery through the triangular space

Relations:
accompanies the radial nerve
deep to the triceps brachii

Injury: compromised collateral circulation

Question 4

radial artery

Answer 4

Course: remains posterior and superificial, it does NOT pass through the carpal tunnel

Relations:
branch of the axillary, parent radial and ulnar
superificial to the biceps brachii, dep to brachialis

Injury: forearm problems?

Question 5

ulnar artery

Answer 5

Course: inferior posterior

Relations:
axillary artery> brachial artery> radial and ulnar artery> common interosseus> anterior interosseus> posterior interosseus

deep to the triceps brachii

Injury: compromised collateral circulation

Question 6

the common interosseus is a branch of ___ artery

Answer 6

common interosseus> anterior interosseus> posterior interosseus

Question 7

artery map: the anterior interosseus branch

Answer 7

axillary artery> brachial artery> radial and ulnar artery> common interosseus> anterior and posterior interosseus

Question 8

artery map: map the posterior interosseus

Answer 8

axillary artery> brachial artery > common interosseus> posterior interosseus

Question 9

anatomical snuff box: which tendons are borders

Answer 9

posterior compartment

extensor pollicis brevis and
abductor pollicis longus

Question 10

anatomical snuff box: which nerve? artery

Answer 10

radial artery

superficial radial nerve

Question 11

claw hand

Answer 11

proximal: injury to inferior chord
distal: injury to ulnar nerve

Question 12

waiter hand

Answer 12

proximal: injury to the superior chord

Question 13

brachial plexus injuries

Answer 13

injury that pushes apart
neck and upper extremity- superior chord
upper extremity and trunk- inferior chord

Question 14

median cubital vein anastomoses __&___

Answer 14

basilic (medial)
cephalic vein (lateral)

the median cubital vein is superficial to the bicipital aponeurosis

Question 15

wrist drop

Answer 15

injury to the radial nerve in the radial groove

Question 16

injury to the musculocutaneous nerve

Answer 16

loss of strength of arm flexors

loss of sensations in lateral forearm (lateral antebrachial cutaneous)