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Neurofunctional Anatomy > Brachial Plexus > Flashcards

Brachial Plexus Flashcards

1
Q

C4, C5 Roots

A

Dorsal scapular nerve

Rhomboids and Levator Scapula

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2
Q

C5,C6,C7 Roots

A

Long Thorasic Nerve

Serratus Anterior

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3
Q

C5, C6 Upper Trunk

A

Nerve to subclavious

subclavious muscle

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4
Q

C5,C6 Upper Trunk

A

Suprascapular Nerve

Supraspinatus and Infraspinatus

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5
Q

C5,C6,C7 Lateral Cord

A

Lateral PerctporalNerve

Pectoralis Major and Minor (by communicating with Medial Pectoral Nerve)

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6
Q

also cut. n

C5, C6, C7 Lateral Cord

A

Musculocutaneous Nerve

Coracobrachialis, Brachialis and Biceps Brachii

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7
Q

C6, C7 lateral cord

A

Lateral root of the Median Nerve

Fibers to the Median N

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8
Q

What lateral cord becomes the Lateral Cutaneous Branch of the forearm?

A

C5, C6,C7 Musculocutaneous Nerve

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9
Q

C5, C6 posterior Cord (upper)

A

Upper Subscapular Nerve

Subscapularis (upper part)

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10
Q

C6, C7, C8 posterior cord

A

Thoracodorsal Nerve
(Middle subscapular N.)

Latissimis Dorsi

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11
Q

lower

C5, C6 posterior cord

A

Lower Subscapular nerve

Subscapularis (lower part), Teres Major

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12
Q

anterior and posterior branch

C5, C6 posterior cord

muscular innervation

A

Axillary Nerve

anterior branch: deltoids (and small area overlying the skin)

Posterior Branch: Teres Minor and Deltoid

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13
Q

anterior and posterior branches

C5, C6 posrterior cord

cutaneous innervation

A

Axillary Nerve

posterior branch becomes Upper lateral cutaneous nerve of the arm

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14
Q

C5, C6, C7, C8 T1 posterior cord

muscular inn

A

Radial Nerve

  • Supinator,
  • Anconeus,
  • the extensor muscles of

* Triceps brachii,

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15
Q

C5, C6, C7, C8, T1 posterior Cord

Cutaneous innervation

A

Radial Nerve

Posterior Cutaneous Nerve of the Arm: skin of the posterior arm

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16
Q

The Posterior Cutaneous Nerve of the Arm is from?

Roots/ Cord/ Nerve

A

C5, C6, C7,C8,T1, Radial Nerve, possterior cord

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17
Q

what does the posterior branch of the Axillary Nerve become?

A

Upper Lateral Cutaneous Nerve of the Arm

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18
Q

What does the posterior branch of the Axillary Nerve become?

A

Upper lateral cutaneous nerve of the arm

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19
Q

list the nerves of C8, T1 medial cord

(5)

A
  • Median Nerve
  • ulnar Nerve
  • Medial Cutaneous Nerve of the Arm
  • Medial Cutaneous Nerve of the forearm
  • Medial Pectoral Nerve
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20
Q

Medial Pectoral Nerve

A

Pectoralis Major and Minor

Medial Cord C8, T1

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21
Q

Medial root of Median Nerve

mixed

A
  • Muscular fibers to the Medial Nerve.
  • Cutaneous innervation to portions of the hand not served by Radial or Ulnar
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22
Q

Medial Cutaneous Nerve of the Arm

A

Front and medial skin of the arm

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23
Q

Medial cutaneous nerve of the forearm

A

Medial skin of the forearm

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24
Q

Ulnar Nerve

muscular innervation

A
  • Flexor carpi ulnaris,
  • the medial two bellies of Flexor digitorum profundus,
  • the intrinsic hand muscles except the Thenar muscles and the two most lateral lumbricals
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25
Q

Ulnar Nerve

cutaneous innervation

A
  • the skin of the medial side of the hand
  • medial one and a half fingers on the palmar side
  • medial two and a half fingers on the dorsal side
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26
Q

Brachial Plexus origin

A

ventral rami C5-C8, T1

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27
Q

motor supply of brachial plexus

A

upper limb and pectoral girdle

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28
Q

sensory supply of brachial plexus

A

upper limb and part of upper thorax

29
Q

what does the brachial plexus consist of

(mnemonic)

A

Ransy, Travis, Drinks, Cold, Beers

Roots, Trunks, Divisions, Cords, Branches

30
Q

what mm are the roots formed between?

A

anterior and midial scalenes

31
Q

what 3 nerve branches arise from the roots directly?

A
  1. Dorsal scapular nerve
  2. subclavian nerve
  3. long thoracic nerve
32
Q

what root does the dorsal scapular nerve arise from and what muscle does it innervate?

A

posterior aspect of C-5 Root,

supplying Rhomboids

33
Q

what root does the subclavian nerve arise from and what does it innervate?

A

anterior root of C-5, C-6

supplies subclavius

34
Q

what root does the long thorasic nerve arise from and what does it innervate?

A

posterior aspects of C-5, C-6, C7

supplies: serratus anterior

35
Q

Trunks are formed from the ____, as they pass through which mm?

A

Roots

anterior and medial scalenes

36
Q

How many trunks and what are their names?

A

Three Trunks;
upper/superior trunk
middle trunk
lower/inferior trunk

37
Q

how is the upper/superior trunk formed?

A

C-5, C-6 Roots

38
Q

how is the middle trunk formed?

A

C-7 root

39
Q

how is the lower/inferior tunk formed?

A

C-8, T-1 Roots

40
Q

how many branches arise from the Trunks?

A

ONE-

the suprascapular nerve

41
Q

what does the suprascapular nerve innervate?

A

mm: supraspinatus and infraspinatus

cut.: GH and acromioclavicular joints

42
Q

How are trunks divided and where?

A

Anterior and posterior Divisions posterior to mid-clavical

43
Q

what branches arise from Divisions?

A

none

44
Q

Generally, what do the anterior and posterior divisions innervate?

A

anterior- anterior compartment (flexor mm)
posterior- posterior compartment (extensor mm)

45
Q

what do the divisions combine to form?

A

Cords

46
Q

What are the cords names in relation to?

A

location to the second part of the axillary artery

47
Q

What are the 3 Cords?

A

lateral cord
medial cord
posterior cord

48
Q

how is the lateral cord formed?

A

from the union of thr upper two anterior divisions

49
Q

the lateral cord’s geography

A

lateral to the lateral border of the first rib

50
Q

how is the medial cord formed?

A

a continuation of the lower anterior division

51
Q

how is the posterior cord formed?

A

a union of the three posterior divisions

52
Q

what periferal nerves branch from the lateral cord?

A
  • lateral pectoral n.
  • musculocutaneous n
  • median n.
53
Q

lateral pectoral n. arises from?

A

lateral cord: C5,C6,C7

54
Q

the musculocutaneous nerve arises from?

A

lateral cord: C5, C6,C7

55
Q

the Median N. arises from?

A

lateral cord: C5, c6, c7, c8 T1
medial cord: C5, C6, C7, C8, T1

56
Q

what periferal nerves branch from the posterior cord?

(5)

A
  • upper scapular nerve
  • thoracodorsal nerve
  • lower scapular nerve
  • radial nerve
  • axillary nerve
57
Q

upper scapular nerve arises from?

A

posterior cord: C5, C6

58
Q

thoracodorsal nerve arises from?

A

posterior cord: C6,C7,C8

59
Q

the lower scapular nerve arises from?

A

posterior cord: C5,C6

60
Q

Radial nerve arises from?

A

posterior cord: C5, C6, C7,C8, T1

61
Q

Axillary nerve arises from?

A

posterior cord:
C5,C6

62
Q

what periferal nerves arise from medial cord?

(5)

A
  • medial pectoral nerve
  • medial cut. nerve of the arm
  • medial cut. nerve of the forearm
  • medial root of the median nerve
  • ulnar nerve
63
Q

medial pectoral nerve arises from?

A

Medial Cord: C8, T1

64
Q

medial cut. nerve of the arm arises from?

A

Medial Cord: C8, T1

65
Q

Medial cut. of the forearm arise from ?

A

medial cord: C8, T1

66
Q

medial root of the median nerve arises from?

A

medial cord: C5, C6, C7, C8, T1

67
Q

the ulnar nerve arises from what ?

A

the medial cord: C7, C8, T1

68
Q
A

Neurofunctional Anatomy (3 decks)

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