M29 - Upper Extremity Neurovasculature

Question 1

Axillary

Answer 1

C5, C6; deltoid, teres minor; skin around shoulder

Question 2

Radial

Answer 2

C5-T1; all posterior muscles of arm and forearm; skin of posterior arm, forearm, hand

Question 3

Musculocutaneous

Answer 3

C5-C7; middle of coracobrachialis, between biceps brachii and brachialis; enters forearm - lateral cutaneous nerve, innervates skin of lateral forearm

Question 4

Ulnar

Answer 4

C8, T1; all muscles of hand except 1/2 LOAF, flexor carpi ulnaris, 1/2 flexor digitorum profundus

Question 5

Median

Answer 5

C6-T1; all muscles of anterior compartment of forearm, 1/2 lumbricals (lateral 2), opponens pollicis, abductor pollicis brevis, flexor pollicis brevis (LOAF); skin of lateral aspect of hand

Question 6

Subclavian artery

Answer 6

Becomes thyrocervical trunk –> suprascapular artery –> supraspinatus & infraspinatus (rotator cuff muscles); army (artery) goes over bridge, navy (nerve) goes under bridge –> dorsal scapular artery (levator scapulae, rhomboids, trapezius)