Exam 2 - Brachial Plexus

Question 1

Dorsal scapular

Answer 1

rhomboid; occasionally levator scapulae

Question 2

Long thoracic

Answer 2

serratus anterior

Question 3

suprascapular

Answer 3

supraspinatus/infraspinatus; glenohumeral joint

Question 4

subclavian

Answer 4

subclavius and sternoclavicular joint

Question 5

lateral pectoral

Answer 5

pectoralis major (part)

Question 6

musculocutaneous

Answer 6

branch from lateral cord to arm flexors

anterior compartment of arm (coracobrachialis, biceps brachii, brachialis) & skin of anterolateral forearm

Question 7

median

Answer 7

anterior forearm compartment
most flexors of forearm, intrinsic palmar muscles, and thenar muscle of the hand and skin of lateral 2 fingers (pronator teres and quadratus, palmaris longus, flexor carpi radialis, flexor digitorum superficialis, flexor digitorum profundus, flexor pollicis longus, 3 thenar muscles, lumbricals to digits 2 and 3)

Question 8

medial pectoral

Answer 8

pectoralis minor/ sternocostal part of pectoralis major (minor?)

Question 9

medial cutaneous nerve of arm

Answer 9

skin of medial side of arm, as far distal as medial epicondyle of humerus and olecranon of ulna

Question 10

median cutaneous nerve of forearm

Answer 10

skin of medial side of forearm, as far distal as wrist

Question 11

ulnar

Answer 11

flexor carpi ulnaris and 1/2 of flexor digortum profundus and most intrinsic muscles of the hand and skin of the medial third of the hand (flexor carpi ulnaris, flexor digitorum profundus, palmaris brevis, 3 hypothenar muscles, lumbricals to digits 4 &5, 7 interossei, adductor pollicis)

Question 12

upper subscapular

Answer 12

subscapularis, teres major

Question 13

lower subscapular

Answer 13

subscapularis, teres major

Question 14

thoracodorsal

Answer 14

latissimus dorsi

Question 15

axillary

Answer 15

teres minor and deltoid muscles

Question 16

radial

Answer 16

all muscles of posterior compartments of arm and forearm

triceps brachii, anconeus, brachioradialis, supinator, all extensors, abductor pollicis longus