Brachial Plexus Pt I

Question 1

Nerves that form the brachial plexus

Answer 1

anterior primary rami of c5 through T1 (may receive fibers from C5 through T1)

Question 2

this area of the brachial plexus travels laterally over rib 1

Answer 2

trunk

Question 3

characteristics of brachial plexus roots

Answer 3

receive gray ramus communicans from sympathetic trunk, pass between anterior and middle scalene into posterior triangle, posterior and superior to subclavian artery

Question 4

roots that form the superior trunk

Answer 4

c5 and 6

Question 5

roots that form the middle trunk

Answer 5

c7

Question 6

roots that form the inferior trunk

Answer 6

c8 and t1

Question 7

cord that lies lateral to the second part of the axillary artery and its fibers

Answer 7

lateral, c5-c7

Question 8

cord that lies medially to second part of the axillary artery and its fibers

Answer 8

medial, c8 and t1

Question 9

cord that lies posterior to the axillary artery and its fibers

Answer 9

posterior, c5-t1

Question 10

Dorsal scapular fibers and muscle supply

Answer 10

C5 ONLY, levator scapula, Rhomboid major and minor

Question 11

Long thoracic nerve fibers and muscle supply

Answer 11

C5-C7, serratus anterior muscle

Question 12

suprascapular fibers and muscle supply

Answer 12

C5 and C6, supraspinatus, infraspinatus

Question 13

nerve to subclavius fibers and muscle supply

Answer 13

C5 and 6, subclavius

Question 14

Lateral pectoral fibers and muscle supply

Answer 14

C5-C7, pectoralis major

Question 15

Musculocutaneous fibers and muscle supply

Answer 15

C5-C7 coracobrachialis, biceps brachii, brachialis

Question 16

Which nerve pierces belly of the coracobrachialis

Answer 16

musculocutaneous

Question 17

as the musculocutaneous nerve passes between the biceps brachii and brachialis into the forearm it becomes this

Answer 17

lateral cutaneous nerve of the forearm

Question 18

medial pectoral fibers and muscle supply

Answer 18

C8 and T1, pectoralis major and minor

Question 19

medial cutaneous nerve of the arm fibers and nerve supply

Answer 19

C8 and T1 supplies skin of the medial arm between the axilla and elbow

Question 20

medial cutaneous nerve of the forearm fibers and nerve supply

Answer 20

C8 and T1, supplies skin of over biceps brachii and anterior/medial aspects of forearm distal to wrist

Question 21

ulnar fibers and muscle supply

Answer 21

C8, T1, and sometimes C7, flexor carpi ulnars and medial half of FDP

Question 22

Ulnar nerve sensory supply

Answer 22

dorsal branch = skin on ulnar side of posterior hand, palmer branch = skin over the hypothenar eminence

Question 23

Muscles supplied be the deep branch of the ulnar hand

Answer 23

abductor digiti minimi, flexor digiti minimi brevis, opponens digit minimi, adductor pollicis, deep head of the flexor pollicis brevis, all interossei, lumbricals 3 and 4

Question 24

claw hand occurs from damage to this nerve

Answer 24

ulnar

Question 25

median nerve fibers and muscles

Answer 25

C6-T1, pronator teres, flexor carpi radialis, palmaris longus, flexor digitorum superficialis, pronator quadratus, flexor pollicis longus, and lateral bellies of FDP

Question 26

pronator quadratus, flexor pollicis longus, and lateral bellies of FDP are supplied by this branch of the median

Answer 26

anterior interosseous nerve of the forearm

Question 27

abductor pollicis brevis, flexor pollicis brevis, opponens pollicis are all supplied by this branch of the median nerve and first two lumbricals

Answer 27

common palmer digital nerves

Question 28

superior subscapular fibers and muscle supply

Answer 28

C5 & C6, subscapularis

Question 29

thoracodorsal fibers and muscle supply

Answer 29

C6-C8, latissimus dorsi

Question 30

inferior subscapular fibers and muscle supply

Answer 30

C5 & C6, subscapularis and teres major

Question 31

axillary nerve fibers and muscle supply

Answer 31

C5 & C6. deltoid and teres minor

Question 32

branch of axillary nerve that supplies the skin over the lateral shoulder and upper arm

Answer 32

superior lateral cutaneous nerve of the arm

Question 33

radial fibers and muscle supply

Answer 33

C5-C8, sometimes T1, all the muscles of the posterior compartment of arm/forearm

Question 34

branch of radial nerve that supplies the skin on the posterior side of arm

Answer 34

posterior cutaneous nerve of the arm

Question 35

muscular branches of the radial nerve will supply these muscles

Answer 35

all three heads of the triceps brachii and anconeus

Question 36

branch of the radial nerve that supplies a narrow area of skin on the lateral side of the posterior forearm

Answer 36

posterior cutaneous nerve of the forearm

Question 37

the superior branch of the radial nerve gives off this nerve and supplies sensory to these areas

Answer 37

dorsal digital nerves, radial side of the posterior, extensor side of the thumb, extensor side of the proximal phalanges 2 & 3, lateral half of the extensor side of teh ring finger

Question 38

supraclavicular injury causing weakness or paralysis in the arm

Answer 38

erb-duschenne palsy

Question 39

infraclavicular injury causing paralysis in the forearm and hand

Answer 39

klumpke’s palsy