Brachial Plexus

Question 1

What makes up the lateral cord?

Answer 1

anterior divisions of superior and middle trunks. C5 C6 C7

Question 2

What makes up the medial cord?

Answer 2

anterior division of the inferior trunk C8 T1

Question 3

What makes up the posterior cord?

Answer 3

posterior division of all three trunks

Question 4

Dorsal Scapular nerve

Answer 4

C5

levator scapula, rhomboid major and minor

Question 5

Long Thoracic nerve

Answer 5

C5 C6 C7

serratus anterior

Question 6

Suprascapular nerve

Answer 6

C5 C6

supraspinatus and infraspinatus

Question 7

Nerve to subclavius

Answer 7

C5 C6

subclavius

Question 8

Lateral Pectoral

Answer 8

C5 C6 C7

Pectoralis major

Question 9

Musculocutaneous

Answer 9

C5 C6 C7

coracobrachialis, biceps brachii, brachialis

Question 10

What muscle does the Musculocutaneous nerve pierce?

Answer 10

coracobrachialis

Question 11

What branch comes off the the Musculocutaneous nerve between the biceps brachii and brachialis

Answer 11

Lateral cutaneous nerve of the forearm

Question 12

Medial Pectoral

Answer 12

C8 T1

Pec major and minor

Question 13

Medial cutaneous nerve of the arm

Answer 13

C8 T1

ramifies in the axilla and supplies skin of the medial arm between the axilla and elbow.

Question 14

When the Medial cutaneous nerve of the arm receives fibers from T2

Answer 14

intercostobrachial nerve

Question 15

Medial cutaneous nerve of the forearm

Answer 15

C8 T1

supplies skin over the biceps brachii, over anterior and medial aspects of forearm distal to the wrist

Question 16

Ulnar

Answer 16

C8 T1 sometimes C7

gives off NO branches in the arm. Crosses in the medial epicondyle.

Question 17

what two muscles does the ulnar nerve innervate in the forearm

Answer 17

flexor carpi ulnaris and medial half of flexor digitorum profundus

Question 18

What two sensory branches does the ulnar nerve give off in the forearm

Answer 18

Dorsal and palmar

Question 19

Dorsal branch of the ulnar nerve

Answer 19

supplies skin on the ulnar side of the posterior hand

Question 20

Palmer branch of the ulnar nerve

Answer 20

supplies the skin over the hypothenar eminence

Question 21

After the ulnar nerve travels deep to the flexor carpi ulnaris and superficial to the flexor retinaculum what two branches does it give off?

Answer 21

superficial and deep

Question 22

Superficial branch of the ulnar nerve

Answer 22

divides into three branches supplying the palmar aspect of the little finger and medial half of the ring finger

Question 23

Deep branch of the ulnar nerve

Answer 23

supplies 7 muscles.
abductor digiti minimi, flexor digiti minimi brevis, opponens digiti minimi, adductor pollicis, deep head of flexor pollicis brevis, all interossei, lumbricals 3 & 4

Question 24

Clinical considerations of the ulnar nerve

Answer 24

claw hand

Question 25

Median nerve

Answer 25

C6 C7 C8 T1 p3 f3 pronator teres, pronator quadratus, palmaris longus, flexor carpi radialis, flexor digitorum superficialis

Question 26

How is the pronator quadratus innervated

Answer 26

by way of the anterior interosseous nerve of the forearm

Question 27

Palmar branch of the median nerve is given off in the distal third of the forearm to supply

Answer 27

skin of the thenar eminence, lateral wrist and palm

Question 28

Palmar branch of the median nerve then divides into what two branches

Answer 28

common palmar digital nerve and proper palmar digital nerve

Question 29

common palmar digital nerve

Answer 29

divides into three branches to supply; | first two lumbricals, abductor policis brevis, flexor pollicis brevis, opponens pollicis

Question 30

proper palmar digital nerve

Answer 30

is sensory only to the skin over the lateral three and a half digits

Question 31

clinical considerations of the median nerve

Answer 31

hand of oath/benediction carpal tunnel syndrome unable to pronate

Question 32

Superior Subscapular nerve

Answer 32

C5 C6 | subscapularis

Question 33

Inferior Subscapular nerve

Answer 33

C5 C6 | subscapularis and teres major

Question 34

Thoracodorsal nerve

Answer 34

C6 C7 C8 | latissimus dorsi

Question 35

Axillary nerve

Answer 35

C5 C6 | deltoid and teres minor

Question 36

At the teres minor the axillary nerve gives off what branches

Answer 36

superior lateral cutaneous nerve of the arm. supplies skin over the lateral shoulder and upper arm

Question 37

Radial nerve

Answer 37

C5 C6 C7 C8 T1

Question 38

At the level of the radial head he radial nerve gives off what two branches?

Answer 38

superficial and deep branches

Question 39

Superficial branch of the radial nerve

Answer 39

follows the brachioradialis to the distal third of the forearm, from where it travels between the brachioradialis and radius to the posterior surface of the hand.

Question 40

Deep branch of the radial nerve

Answer 40

penetrates the supinator muscle. it terminates into the posterior interosseous nerve

Question 41

Posterior cutaneous nerve of the arm

Answer 41

supplies skin on the posterior side of the upper arm

Question 42

inferior lateral cutaneous nerve of the arm

Answer 42

branches off the radial in the middle arm

Question 43

Muscular branches given off the radial nerve in the arm

Answer 43

triceps brachii and anconeus

Question 44

Posterior cutaneous nerve of the forearm

Answer 44

given off in the upper arm and supplies a narrow area of skin on the lateral side of the posterior forearm

Question 45

Branches of the radial nerve given off at the lateral epicondyle supply what

Answer 45

brachioradialis, extensor carpi radialis longus

Question 46

Once in the forearm the radial nerve splits into what two branches

Answer 46

deep and superficial

Question 47

The superficial branch travels to the hand and gives off what nerve

Answer 47

dorsal digital nerves. supplies everything ulnar doesnt

Question 48

the deep branch of the radial nerve supplies

Answer 48

extensor carpi radialis brevis, supinator, extensor digitorum, extensor digiti minimi, extensor carpi ulnaris, abductor pollicis longus, extensor pollicis brevis

Question 49

What is the terminal branch of the deep branch of the radial nerve

Answer 49

posterior interosseous nerve

Question 50

posterior interosseous nerve supplies

Answer 50

extensor pollicis longus, extensor indicis

Question 51

Clinical considerations of the radial nerve

Answer 51

wrist drop, triceps and brachioradialis reflexes

Question 52

Erb-Duchenne

Answer 52

Supraclavicular traction injury. C5 C6

Question 53

Klumpke

Answer 53

Infraclavicular injury like hanging from a limb. C8 T1