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MSK Final Exam > UE Neurology > Flashcards

UE Neurology Flashcards

1
Q

Describe the supraclavicular nerve of the cervical plexus

A

C3-4
Cutaneous innervation to the skin over the neck and shoulder
Includes lateral, middle and medial supraclavicular Ns

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2
Q

The brachial plexus is the anterior rami of what?

A

C5-T1

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3
Q

What are the roots of the brachial plexus?

A

Dorsal scapular N, long thoracic N and muscular branches (to scalenes)

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4
Q

What is the nerve root for dorsal scapular N?

A

C5

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5
Q

What is the nerve root for long thoracic N?

A

C5-7

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6
Q

What are trunks of the brachial plexus?

A 
Superior trunk (C5-6) containing the suprascapular and subclavian N 
Middle (C7) and inferior trunk (C8-T1)
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7
Q

What does the suprascapular N innervate?

A

Supraspinatus and infraspinatus M

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8
Q

What does the subclavian N innervate?

A

Subclavius

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9
Q

What are the divisions of the brachial plexus?

A

Anterior division which forms the medial and latearl cords

Posterior division which forms the posterior cord

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10
Q

What are the three cords of the brachial plexus?

A

Medial, lateral and posterior

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11
Q

What nerve branches off the lateral cord of the brachial plexus?

A

Lateral pectoral nerve (C5-7)

Innervates pec major

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12
Q

What are the branches of the medial cord of the brachial plexus?

A

Medial pectoral, medial brachial cutaneous and medial antebrachial Ns
All C8-T1

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13
Q

What does the medial pectoral N innervate?

A

Pec minor and major

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14
Q

What does the medial brachial cutaneous N innervate?

A

Sensory cutaneous innervation for the brachium

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15
Q

What does the medial antebrachium cutaneous N innervate?

A

Sensory cutaneous innervation of the antebrachium

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16
Q

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

A

Superior (upper) subscapular, thoracodorsal and inferior (lower) subscapular N

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17
Q

Describe the superior/upper subscapular nerve

A

C5-6

Innervates superior portion of subscapularis

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18
Q

Describe the thoracodorsal N

A

C6-8

Innervates latissimus dorsi

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19
Q

Describe the inferior/lower subscapular N

A

C5-6

Innervates the inferior portion of the subscapular M and teres major M

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20
Q

What is the terminal branch of the lateral cord?

A

Musculocutaneous nerve (C5-7) and median nerve

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21
Q

What does the musculocutaneous nerve innervate?

A

Anterior brachial muscles including coracobrachialis (which it pierces), biceps brachii and brachialis

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22
Q

Which nerve supplies sensory cutaneous innervation to the lateral aspect of the antebrachium?

A

Lateral antebrachial cutaneous N (C6-7)

Branch from musculocutaneous N

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23
Q

What are the terminal branches of the posterior cord?

A

Axillary and radial nerve

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24
Q

Describe the axillary N

A

C5-6
Innervates deltoid and teres minor + sensory innervation to the glenohumeral joint
Branches into superior lateral brachial cutaneous N

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25
Q

What is the superior lateral brachial cutaneous N?

A

Branch from the axillary N
C5-6
Sensory cutaneous innervation for the superior half of the lateral aspect of the brachium

26
Q

What are the terminal branches of the of the medial cord?

A

Median and ulnar nerve

27
Q

Describe the median N

A

C5-T1
Formed by the union of medial and lateral cord terminal branches
Branches include articular, muscular, anterior interosseous, palmar cutaneous, recurrent branch lateral and medial branch

28
Q

What are the nerve roots for the ulnar N?

A

C7-T1

29
Q

What are the nerve roots of the radial N?

A

C5-T1

30
Q

What do the articular branches of the median N innervate?

A

Sensory innervation to the elbow joint

31
Q

What do the muscular branches of the median N innervate?

A

Pronator teres, flexor carpi radialis and flexor digitorum superficialis

32
Q

What does the anterior interosseous N of the median N innervate?

A

Lateral half of the flexor digitorum profundus, flexor pollicis longus and pronator quadratus
Provides sensory innervation to wrist joint
Runs with anterior interosseous A

33
Q

What does the palmar cutaneous branch of the median N innervate?

A

Sensory cutaneous innervation to the central palm

Originates from median N before it enters the carpal tunnel

34
Q

What does the recurrent branch of the median N innervate?

A

C8-T1

Abductor pollicis, opponens pollicis and superficial head of the flexor pollicis brevis

35
Q

What does the medial branch of the median N innervate?

A

2nd lumbrical muscle and becomes the medial two common palmar digital Ns —> proper palmar digital Ns

36
Q

What do the proper palmar digital Ns of the median N innervate?

A

Dorsal and palmar distal surfaces of the 1st, 2nd and 3rd and lateral half of 4th digit

37
Q

Describe the lateral branch of the median N

A

Innervates the 1st lumbrical

Becomes two common plantar palmar digital N which form the proper palmar digital Ns

38
Q

What are the branches of the ulnar N?

A

Articular branches, muscular branches, palmar cutaneous branch, dorsal cutaneous branch, deep and superficial ulnar

39
Q

What does the articular branch of the ulnar N innervate?

A

Sensory innervation from the elbow joint

40
Q

What do the muscular branches of the ulnar N innervate?

A

Flexor carpi ulnaris and medial half of the flexor digitorum profundus

41
Q

What does the palmar cutaneous branch of the ulnar N innervate?

A

Sensory cutaneous innervation to the distal most anterior antebrachium and medial 1/3 of palm

42
Q

What does the dorsal cutaneous branch of the ulnar N innervate?

A

Sensory cutaneous innervation to the medial half of the dorsum of the hand
Forms digital branches of dorsal digital Ns which supply 4th and 5th digits

43
Q

What does the deep ulnar N innervate?

A

Abductor digiti minimi, flexor digiti minimi, opponens digiti minimi, 3 and 4th lumbricals, dorsal and palmar interossei, adductor pollicis and deep head of the flexor pollicis brevis

44
Q

Describe the superficial ulnar N

A

Branches into common palmar digital N —> proper palmar digital N which provides sensory innervation to the medial half of 4th and 5th digits

45
Q

What are the branches of the radial N?

A

Posterior brachial and antebrachial cutaneous, muscular branches, deep radial, posterior interosseous and superficial radial N

46
Q

What does the posterior brachial cutaneous N of the radial N innervate?

A

Sensory cutaneous innervation from the posterior aspect of the brachium
C5-8

47
Q

What does the posterior antebrachium of the cutaneous N of the radial N innervate?

A

Sensory cutaneous innervation to the posterior aspect of the antebrachium
C5-8
Produces inferior lateral brachial cutaneous N

48
Q

What do the muscular branches of the radial N innervate?

A

Triceps, aconeus, brachioradialis and extensor carpi radialis longus

49
Q

What does the deep radial N innervate?

A

C7-8
Extensor carpi radialis brevis and supinator
Terminal branch of radial N and continues as the posterior interosseous N

50
Q

What does the posterior interosseous N of the radial N innervate?

A

Extensor digitorum, extensor digiti minimi, extensor carpi ulnar, extensor indicis, abductor pollicis longus, extensor pollicis longus and extensor pollicis brevis

51
Q

What does the superficial radial N innervate?

A

Sensory to numerous joints in the hand and wrist
Sensory cutaneous innervation from the lateral half of the dorsum of the hand
Produces 3-4 dorsal digital branches —> digital branches of dorsal digital

52
Q

What do the digital branches of the dorsal digital Ns (of radial N) innervate?

A

Sensory cutaneous innervation from the dorsal aspect of the pollux, proximal aspect of the dorsum of 2nd, 3rd and lateral half of the 4th digits

53
Q

What are the thoracic spinal nerves?

A

Intercostobrachial N

54
Q

Describe the intercostobrachial N of the thoracic spinal nerves

A

Lateral cutaneous branch of the 2nd intercostal N (T2)

Provides sensory cutaneous innervation to the uppermost medial aspect of the brachium

55
Q

Where is the C5 dermatome?

A

Over the deltoid

56
Q

Where is the C6 dermatome?

A

Lateral antebrachium and hand including the pollux

57
Q

Where is the C7 dermatome?

A

Central portion of the hand and posterior antebrachium including the 3rd digit

58
Q

Where is the C8 dermatome?

A

Medial hand and antebrachium including 5th digit

59
Q

Where is the T1 dermatome?

A

Medial brachium

60
Q

Where is the T2 dermatome?

A

Anterior border of axilla

MSK Final Exam (26 decks)

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