Brachial Plexus Flashcards Preview

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Flashcards in Brachial Plexus Deck (119):
1

what does it supply

upper extremities

2

what is it formed by

anterior primary rami of C5-T1

3

it can also receive fibers from

C4 and/or T2

4

where does it travel

laterally over rib 1, into the axilla; medial to lateral

5

roots combine into

trunks

6

trunks divide into

divisions

7

divisions combine to form

cords

8

cords divide into

terminal nerves

9

each root receives a ____ from the sympathetic trunk

gray rams communicans

10

what muscles do the roots pass between

anterior and middle scalene into the posterior triangle

11

roots are posterior and superior to the ___

subclavian artery

12

roots of C5 and C6 combine to form the

superior trunk

13

roots of C7 forms the

middle trunk

14

roots of C8 and T1 combine to form the

inferior trunk

15

trunks pass over rib 1 into the

axilla

16

each trunk splits into an

anterior and posterior division

17

anterior divisions will supply

anterior compartments

18

what do the posterior divisions supply

posterior compartments of the arm and forearm

19

cords are named in relationship to the

axillary artery

20

what is the lateral cord formed by

anterior divisions of the superior and middle trunks

21

the lateral cords contains fibers from

C5-C7

22

what does the lateral cord lie lateral to

second part of the axillary artery

23

what is the medial cord formed by

anterior division of the inferior trunk

24

the medial cord contains fibers from

C8-T1

25

what does the medial cord lie medial to

second part of the axillary artery

26

what is the posterior cord formed by

union of the posterior division of all 3 trunks

27

the posterior cord contains fibers from

C5-T1

28

what does the posterior cord lie posterior to

second part of the axillary artery

29

roots of the dorsal scapular nerve

C5

30

what muscles does the dorsal scapular nerve supply

levator scapula, rhomboid major, rhomboid minor

31

what supplies the elevator scapula

C5 and C3-C4

32

what forms the long thoracic nerve

C5-C7

33

what muscle does the long thoracic nerve supply

serratus anterior

34

what nerves are formed from the roots of the brachial plexus

dorsal scapular and long thoracic

35

what nerves are formed from the superior trunk of the brachial plexus

supra scapular and nerve to the subclavius

36

what fibers form the suprascapular nerve

C5-C6

37

what does the suprascapular nerve supply

supraspinatus and infraspinatus

38

what fibers form the nerve to the subclavius

C5-C6

39

what muscle does the nerve to the subclavius supply

subclavius

40

what nerves are formed from the lateral cord of the brachial plexus

lateral pectoral and musculocutaneous

41

what fibers form the lateral pectoral nerve

C5-C7

42

what muscle does the lateral pectoral nerve supply

pectorals major- also supplied by medial pectoral nerve

43

what fibers form the musculocutaneous nerve

C5-C7

44

what muscles does the musculocutaneous nerve supply

coracobrachialis, biceps brachii, and the brachialis

45

what nerve pierces the belly of the coracobrachialis

coracobrachialis

46

the musculocutaneous nerve travels into the forearm to form the

lateral cutaneous nerve of the forearm

47

what does the lateral cutaneous nerve of the forearm supply

skin over the lateral aspect of the forearm

48

what nerves are from the medial cord of the brachial plexus

medial pectoral, medial cutaneous nerve of the arm, medial cutaneous nerve of the forearm, ulnar nerve and median nerve

49

what fibers form the medial cutaneous nerve of the arm

C8-T1

50

what does the medial cutaneous nerve of the arm supply

skin of the medial arm between the axilla and the elbow

51

the medial cutaneous nerve of the arm also receives some fibers from T2 through a communication with the

intercostobrachial nerve

52

what fibers form the medial cutaneous nerve of the forearm

C8-T1

53

the medial cutaneous nerve of the forearm leaves the medial cord just distal to the

medial cutaneous nerve of the arm

54

what does the medial cutaneous nerve of the forearm supply

skin over the biceps brachii and the skin over the anterior and medial aspects of the forearm proximal to the wrist

55

what fibers form the ulnar nerve

C8-T1 and sometimes C7

56

the ulnar nerve travels medial to the ___, in the medial bicipital sulcus

brachial artery

57

does the ulnar nerve give off branches in the arm

no

58

where does the ulnar nerve cross

on the posterior side of the medial epicondyle

59

what muscle does the ulnar nerve travel between

the two heads of the flexor carpi ulnaris

60

what muscles does the ulnar nerve supply

flexor carpi ulnari and medial half of the flexor digitorum profundus

61

what does the ulnar nerve supply

dorsal branch and palmar branch

62

what does the dorsal branch of the ulnar nerve supply

skin on the ulnar side of the posterior hand

63

what does the palmar branch of the ulnar nerve supply

skin over the hypothenar eminence

64

what is the pathway of the ulnar nerve

travels deep to the flexor carpi ulnas to the wrist, passes superficial to the flexor retinaculum, and divides into two branches

65

what do the 3 terminal branches of the superficial branch of the ulnar nerve supply

palmar aspect of the little finger and medial half of the ring finger

66

what muscles does the deep branch of the ulnar nerve supply

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

67

what clinical considerations of the ulnar nerve cause

claw (ape) hand and carpal tunnel syndrome

68

what forms the median nerve

lateral and medial cords

69

what fibers form the median nerve

C6-T1

70

where does the median nerve travel

through the arm in the medial bicipital sulcus

71

does the median nerve give off branches in the arm

no

72

what is the pathway of the median nerve

crosses the elbow on the anterior side, enters the forearm after passing between the heads of the pronator teres

73

what muscles does the median nerve supply

pronator teres, flexor carpi radialis, palmaris longus, flexor digitorum superficialis, pronator quadratus, flexor pollicus longus, and the lateral bellies of the flexor digitorum profundus

74

the median nerve supplies muscles of the forearm by way of

anterior interosseous nerve of the forearm

75

the ___ branch of the median nerve is given off in the distal third of the forearm

palmar

76

what does the palmar branch supply

skin of the thenar eminence, lateral wrist and palm

77

the ulnar nerve passes through the carpal tunnel and divides into 3 ___

common palmar digital nerves

78

what muscles does the first common palmar digital nerve supply

abductor pollicis brevis, flexor pollicis brevis, opponens pollicis

79

each common palmar digital nerve splits into 2 ___

proper palmar digital nerves

80

what do the proper palmar digital nerves supply

skin over the lateral 3 and a half digits anteriorly and lateral 2 and a half digits posteriorly

81

what else does the median nerve supply

periosteum, elbox, radoiocarpal and midcarpal joints, and communicates with the ulnar nerve at the wrist

82

what clinical considerations can the median nerve cause

hand of oath/benediction, carpal tunnel syndrome, unable to pronate

83

what nerves are given off from the posterior cord of the brachial plexus

superior subscapular, thoracodorsal, inferior sub scapular, axillary and radial nerves

84

what fibers form the superior subscapular nerve

C5-C6

85

what muscle does the superior subscapular nerve supply

subscapularis

86

what fibers form the thoracodorsal nerve

C6-C8

87

what muscle does the thoracodorsal nerve supply

latissimus dorsi

88

what fibers form the inferior subscapular nerve

C5-C6

89

what muscles does the inferior subscapular nerve supply

subscapularis and teres major

90

what fibers form the axillary nerve

C5-C6

91

what muscles does the axillary nerve supply

deltoid and teres minor

92

what nerve supplies the sensory portion of the deltoid

superior lateral cutaneous nerve of the arm

93

what else does the superior lateral cutaneous nerve of the arm supply

skin over the lateral shoulder and upper arm

94

what fibers form the radial nerve

C5-C8, and sometimes T1

95

what muscles does the radial nerve supply

all of the muscles in the posterior compartment of the arm and forearm

96

where does the radial nerve travel

posterior to the humerus from the medial bicipital sulcus

97

what does the posterior cutaneous nerve of the arm supply

skin on the posterior side of the upper arm

98

where does the posterior cutaneous nerve of the arm branch off

in the upper arm

99

where does the inferior lateral cutaneous nerve of the arm branch off

in the middle arm

100

what muscles are supplied by muscular branches

all 3 heads of the triceps brachii, anconeus, and brachialis

101

what does the posterior cutaneous branch of the forearm supply

narrow area of the skin on the lateral side of the posterior forearm

102

branches of the radial nerve given off at the level of the lateral epicondyle supply what muscles

brachioradialis and extensor carpi radials longus

103

what is the pathway of the radial nerve

passes into the forearm on the anterior side of the elbow after traveling between the brachialis and brachioradialis

104

the radial nerve divides into what branches at the level of the radial head

superficial and deep branches

105

what is the pathway of the superficial branch of the radial nerve

follows the brachioradialis to the distal third of the forearm, travels between the brachioradialis and the radius to the posterior surface of the hand, gives rise to dorsal digital nerves

106

what does the superficial branch of the radial nerve supply

radial side of the posterior hand, extensor side of the thumb, extensor side of the proximal phalanges of digits 2 and 3, lateral half of the extensor side of the ring finger

107

the superficial branch of the radial nerve also gives off

the communicating branch with the ulnar nerve

108

what is the pathway of the deep branch of the radial nerve

penetrates the supinator muscle, gives off a series of branches to supply the posterior forearm muscles before terminating

109

what does the deep branch of the radial nerve terminate as

posterior interosseous nerve

110

what muscles does the posterior interosseous nerve supply

extensor carpi radialis brevis, supinator, extensor digitorum, extensor digiti minimi, extensor carpi ulnari, abductor pollicus longus, extensor pollicis brevis, extensor pollicus brevis, extensor indicus

111

the radial nerve sends articular branches to the

shoulder and wrist

112

what are clinical considerations the radial nerve can cause

wrist drop and triceps and brachioradialis reflexes

113

what are some brachial plexus injuries

erb-duchenne and klumke's palsy

114

what nerves are damaged in era-duchenne

supraclavicular, musculocutaneous and axillary

115

what is erb-duchenne

waiter's tip deformity

116

what roots are involved with erb-duchenne

C5-C6

117

what nerve is involved with klumpke's palsy

ulnar

118

what is klumpke's palsy

atrophy of the hands

119

what roots are involved with klumpke's palsy

C8-T1