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Pns > Brachial plexus > Flashcards

Brachial plexus Flashcards

0
Q

Formed by Of

A

Anterior primary rami of C5 thru T1. Also(C4 T2)

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1
Q

Brachial Plexus supplies?

A

Upper extremities

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2
Q

Travels laterally over …..

A

Rib 1 into the axilla

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3
Q

Roots combine to form

A

Trunks

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4
Q

Trunks divide into….

A

Divisions

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5
Q

Divisions combine to form

A

Cords

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6
Q

Cords divide into…..

A

Terminal nerves

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7
Q

Each root receives a From

A

Gray ramus communicans from sympathetic trunk. Passes between ant and middle scalene into posterior triangle.

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8
Q

Roots of C5 and C6 combine to form

A

Superior Trunk

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9
Q

Roots of C7 stays alone to become

A

Middle Trunk

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10
Q

Roots of C8 and T1 combine to form

A

Inferior Trunk

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11
Q

Each trunk splits into what two divisions?

A

Ant and post divisions

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12
Q

Anterior and posterior divisions supply what?

A

Ant division supplies anterior compartments, posterior division supplies posterior compartment of arm and middle forearm.

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13
Q

Cords named for relationship to axillary artery?

A

Lateral, medial, posterior cords

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14
Q

The lateral cord is formed by the

A

Anterior division of the superior and middle trunks

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15
Q

The lateral cord contains fibers from?

A

C5,C6 C7

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16
Q

The lateral cord lies lateral to what?

A

Second part of axillary trunk

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17
Q

The medial cord is formed by the?

A

Anterior division of the inferior trunk

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18
Q

The medial cord contains fibers from?

A

C8 T1

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19
Q

The medial cord lies medial to what?

A

Second part of axillary artery

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20
Q

The posterior cord is formed by?

A

Union of the posterior division of all three trunks

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21
Q

The posterior cord contains fibers from?

A

C5 C6 C7 C8 T1

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22
Q

The posterior cord lies posterior to what?

A

Second part of the axillary artery

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23
Q

What are the nerves formed from roots of brachial plexus?

A

Dorsal scapular and long thoracic

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24
Q

The dorsal scapular nerve branches off of what root?

A

C5 root

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25
Q

The dorsal scapular nerve contains fibers from?

A

C5

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26
Q

What muscles are supplied by the dorsal scapular nerve?

A

Levator scapula, rhomboid major and minor

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27
Q

The levator scapula receives fibers from?

A

C3 C4 C5

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28
Q

The long thoracic nerve is formed from what roots?

A

C5 C6 C7

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29
Q

The long thoracic nerve contains fibers from?

A

C5 C6 C7

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30
Q

The long thoracic never supplies what muscles?

A

Serratus anterior

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31
Q

What nerves branch off the superior trunk of the brachial plexus?

A

Suprascapular and subclavius

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32
Q

The suprascapular contains fiber from?

A

C5 C6

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33
Q

Th suprascapular supplies what muscles?

A

Supraspinatus infraspinatus

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34
Q

The nerve to the subclavius contains from?

A

C5 C6

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35
Q

THe subclavius supplies what muscle?

A

Subclavius

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36
Q

What are the nerves branching off the lateral cord of the brachial plexus?

A

Lateral pectoral, musculocutaneous

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37
Q

The lateral pectoral contains fibers from?

A

C5 C6 C7

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38
Q

The lateral pectoral nerve supplies what muscleS?

A

Pectoralis major

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39
Q

The Pectoralis major receives innervation from what nerves?

A

Medial and lateral pectoral nerve

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40
Q

The musculocutaneous nerve contains fibers from?

A

C5 C6 C7

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41
Q

The musculocutaneous nerve supplies what muscles?

A

Coracobrachialis, biceps brachii(long and short), brachialis

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42
Q

The musculocutaneous nerve travels between the biceps brachii and brachialis into the forearm to become the?

A

Lateral cutaneous nerve of the forearm which supplies skin over lateral aspect of forearm, not the hand!

43
Q

What are the nerves off the medial cord of the brachial plexus?

A

Medial pectoral, medial cutaneous of forearm, medial cutaneous of the arm, ulnar, median

44
Q

The median pectoral nerve contains what fibers?

A

C8 T1

45
Q

What muscles the medial pectoral nerve does this nerve supply?

A

Pectoralis major and minor

46
Q

The medial cutaneous nerve to the arm contains what fibers?

A

C8 T1

47
Q

The medial cutaneous nerve of the arm supplies what muscles?

A

Ratifies in the axilla and supplies the skin of the medial arm between the axilla and the elbow

48
Q

The medial cutaneous nerve of the arm receives some fibers from T2 through a communication from what nerve?

A

Intercostobrachial nerve

49
Q

The medial cutaneous outs nerve of the forarm contains fibers from?

A

C8 T1

50
Q

The medial cutaneous nerve of the forearm leaves ……. Just……. To medial cutaneous nerve of the arm

A

Medial cord just distal

51
Q

The medial cutaneous nerve supplies what muscles?

A

Skin over biceps brachii and skin over ant and medial aspects of forearm distal to the wrist.

52
Q

The ulnar nerve is not a terminal branch of the medial cord

A

False

53
Q

The ulnar nerve contains fibers from?

A

C8 T1 sometimes C7

54
Q

The ulnar nerve travels medial to what artery?

A

Brachial artery in the medial bicipital sulcus

55
Q

The ulnar nerve gives no branches in the arm

A

True

56
Q

The ulnar nerve crosses the elbow on the posterior side of the?

A

Medial epicondyle in the sulcus for the ulnar nerve

57
Q

The ulnar nerve is easily palpated here

A

Funny bone

58
Q

The ulnar nerve continues into the forearm between the?

A

Flexor carpi ulnaris

59
Q

The ulnar nerve innervated what muscles?

A

Flexor carpi ulnaris and medial half of the flexor digitorum profundus

60
Q

The ulnar nerve gives off two sensory branches?

A

Dorsal branch supplies ulnar side of the posterior hand

Palmer branch supplies skin over hypothenar eminence.

61
Q

Travels deep to the flexor carpi ulnaris to the wrist, passes superficial to the flexor retinaculum and divides into two branches?

A

Superficial which divides into three terminal branches( proper palmer branches) that supply palmer aspect of the little finger and medial half of the ring finger
Deep branch in the hand curves towards the the bar eminence and supplies the abductor digiti minimi, flexor digiti minimi brevis, opponens digiti minimi, abductor pollicis, deep head of the flexor pollicis brevis, all interossei (dorsal and palmar), lumbricals 3 and 4

62
Q

What is the name for ulnar paralysis?

A

Claw hand

63
Q

The median nerve contributes from what cords?

A

Medial and lateral cord

64
Q

The median nerve contains fibers from?

A

C6, C7, C8 T1

65
Q

The median nerve travels thru the arm in the?

A

Medial bicipital sulcus

66
Q

The median branch gives off branches

A

False

67
Q

The median nerve crosses elbow on the anterior side and enters the forearm after passing between?

A

Pronator teres

68
Q

The median nerve innervates five muscles in the forearm?

A

Pronator teres, flexor carpi radialis, palmaris longus, flexor digitorum superficialis, Pronator quadratus by the way of the anterior interosseous nerve of the forearm

69
Q

The palmer branch of the median nerve is given off the?

A

Distal one third of the forearm

70
Q

The palmer branch of the median nerve supples?

A

The skin over the thenar eminence, lateral wrist and palm

71
Q

The median nerve passes through what? to divide into what nerve?

A

Capal tunnel, common palmar digital nerves

72
Q

The palmer digital nerves supply?

A

Two lumbricals muscles

73
Q

The first common palmer digital nerve supplies?

A

Abductor pollicis brevis, flexor pollicis brevis( superficial head), opponens pollicis

74
Q

Each common palmer digital nerve splits into two proper palmar digital nerves

A

True

75
Q

Proper palmer nerves supply what?

A

Sensory function only to the skin over lateral three and half digits

76
Q

The median nerve supplies?

A

Periosteum, elbow, radiocarpal, midcarpal joints, and communicates with ulnar nerve at the wrist.

77
Q

What are the branches off the posterior cord of the brachial plexus?

A

Superior subscapular nerve, thoracodorsal nerve, inferior subscapular, axillary, radial

78
Q

The superior subscapular nerve contains fibers from?

A

C5 C6

79
Q

The superior subscapular nerve supplies what muscles?

A

Subscapularis

80
Q

The thoracodorsal nerve contains fibers from?

A

C6 C7 C8

81
Q

The thoracodorsal nerve travels along the posterior axillary wall to supply the?

A

Latissimus dorsi

82
Q

The inferior subscapular nerve contains fibers from?

A

C5 C6

83
Q

The inferior subscapular supplies?

A

Subscapularis and teres major

84
Q

The axillary nerve contains fibers from?

A

C5 C6

85
Q

The axillary nerve travels posteriorly around what?

A

Of the surgical neck of the humerus

86
Q

The axillary nerve supplies the?

A

Deltoid and teres minor

87
Q

At the same level that the branch to the teres minor is given off, there is a sensory branch called?

A

Superior lateral cutaneous nerve to the arm

88
Q

The superior lateral cutaneous nerve of the arm supplies the skin over?

A

Lateral shoulder and upper arm

89
Q

The radial nerve contains fibers from?

A

C5 C6 C7 C8 sometimes T1

90
Q

The radial nerve supplies what muscles?

A

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

91
Q

The radial nerve spirals around the posterior of humerus from the medial bicipital sulcus

A

True

92
Q

The radial nerve passes into the forearm on the anterior side of the slow after traveling btw brachialis and brachioradialis

A

True

93
Q

The radial nerve divides into what branches ar the level of the radial head?

A

Superficial branch which follows brachioradialis to distal third of forearm from where it travels btw brachioradialis and radius to posterior surface of hand
Deep branch penetrates the supinator muscle gives off branches to supply posterior forearm muscle.

94
Q

The deep branch of the radial nerve terminates at what nerve?

A

Posterior interosseous nerve

95
Q

The posterior interests sepia nerve branches off the upper arm and supplies what?

A

Skin on posterior side of the upper arm

96
Q

The inferior lateral cutaneous nerve of the arm branches off the raidial in the middle arm

A

True

97
Q

The muscular branches off in the arm will supply?

A

Three heads of triceps brachii, anconeus by way of a branch off the medial head of triceps

98
Q

The posterior cutaneous nerve of the forearm is given off the upper arm and supplies?

A

Narrow area of skin on lateral side of posterior forearm

99
Q

What branches given off at the level of the lateral epicondyle supplies?

A

Brachioradialis and extensor carpi radialis longus

100
Q

Once in the forearm the radial nerve splits into deep and superficial branches.

A

True

101
Q

The superficial ranch travels to hand gives off what nerve?

A

Dorsal Digital nerve

102
Q

The dorsal nerve supplies sensory info to?

A

Radial side posterior thumb, extensor side of thumb, extensor side proximal phalanges of digits two three, lateral half extensor side ring finger

103
Q

Th superficial branch also gives off?

A

Communicating branch with the ulnar nerve

104
Q

The deep branch gives off branches to the following forearm muscles?

A

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

105
Q

The posterior interosseous nerve is the terminal branch of the deep branch of the radial nerve it supplies?

A

Extensor pollicis longus, extensor indicis

106
Q

The radial nerve sends articular branches to the?

A

Shoulder and wrist

Pns (3 decks)

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