Neurovascular Supply to the Upper Limb Flashcards Preview

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Flashcards in Neurovascular Supply to the Upper Limb Deck (50):
1

Where does the subclavian artery become the axillary artery?

After the 1st rib

2

Where does axillary artery end?

Inferior border of the teres major

3

What comes off the brachial artery?

Circumflex of the humerus going around humeral neck
Profunda brachii (deep artery of the arm going posteriorly)
collateral vessels going to elbow (radial inferior and superior ulnar)

4

What is the role of collateral vessels?

No matter what the position of the elbow and joint, you will still get blood flow to the forearm

5

Which compartment are the radial and ulna arteries in?

Both anterior

6

What runs between the radial and ulna arteries?

Anterior interosseous artery

7

Which arteries arise to which palmar arch?

Ulna artery arises to superficial palmar arch
Radial artery arises to deep palmar arch

8

What comes off the palmar arches?

Palmar arches anastomose and become digital branches

9

Where is the branchial pulse felt?

Mid shaft of the humerus or more easily in cubital fossa?

10

Where do the deep veins run?

In the muscular compartments and have same name as arteries

11

Where do the superficial veins run?

In superficial fascia

12

Where does your basilic vein run?

Down medial line of upper arm

13

Where does your cephalic vein run

Between pectoralis major and minor

14

Where do the basilic and cephalic veins join?

In cubital fossa by median cubital vein

15

What is the brachial plexus?

major network of nerves which provides sensory and motor innervation to the upper limb.

16

What spinal roots make up the brachial plexus?

C5-T1

17

What is the pathway of the brachial plexus?

see diagram...

18

What are the subdivisons of the brachial plexus?

Reach to drink cold beer
Roots trunk divisons cords branches

19

What are the names of the 3 trunks and where do they stem from?

Superior - C5 & C6
Middle - C7
Inferior - C8 & T1

20

What are the 3 cords?

Lateral, posterior, medial

21

What are the 5 branches and what are there roots?

Musculacutaneous - C5 and C7
Axillary - C5-C6
Median - C5-T1
Radial - C5-T1
Ulnar - C8-T1

22

What muscles does the musculocutaneous nerve supply?

Biceps brachialis
Brachialis
Coracobrachialis

23

What do the sensory fibres of the musculocutaneous arm inervate?

Sensory fibres innervate the skin of the lateral forearm

24

Why is damage to the musculocutaeous rare?

Very short pathway, especially to brachilais so not much chance that it will be damaged

25

Which compartment does the musculocutaneous nerve supply?

BBC - in anterior compartment

26

Where does the axillary nerve run

underneath shoulder to get posteriorly to deltoid and teres minor

27

What does the axillary nerve innervate?

motor innervation to deltoid and teres minor

28

What is the sensory innervation of the axillary nerve?

sensory innervation to the skin over the deltoid muscle.

29

When is axillary nerve damaged?

in shoulder dislocation or fracture of humeral neck.

30

What does damage to axillary nerve result in?

Resulting in a loss of shoulder abduction beyond 15 degrees, and a sensory loss on the lateral aspect of the proximal part of the arm

31

Where does the median nerve run?

The median nerve runs medial to biceps brachii with the brachial artery, and runs anteriorly at the cubital fossa to enter the forearm, the through carpal tunnel to reach hand

32

What does the media nerve supply?

majority of the flexor compartment of forearm
and muscles of the thumb
none of upper arm

33

What is the sensory innervation of the median nerve?

Sensory fibres innervate the skin over lateral palm, digits 1-3.5

34

Where does the radial nerve run?

posterior compartment of the arm and runs in the radial groove deep to triceps brachii

35

What does the radial nerve innervate?

all of the muscles on the posterior aspect of the arm and forearm

36

What is the sensory innervation of the radial nerve?

Sensory fibres innervate the skin over posterior arm to wrist, dorsal hand
Base of digits 1-3 & thumb

37

Where does the ulnar nerve run?

runs medially in the arm and passes posterior to the medial epicondyle of the humerus.

38

What does the ulnar nerve innervate?

Flexor carpi ulnaris and the ulnar half of flexor digitorum profundus in the forearm. In the hand the ulnar nerve innervates most of the intrinsic muscles of the hand.

39

What is the sensory innervation of the ulnar nerve?

innervate the skin over medial dorsal and plantar hand,
Digits 3.5 - 5

40

What is a symptom of ulnar nerve damage?

Clawing of the hands

41

What will a break in the superior trunk of the plexus affect?

affecting musculocutaneous axillary and some of median nerve

42

What condition can a break in the superior trunk cause?

Erb's Palsy

43

What are the symptoms of Erb's Palsy?

Adducted shoulder
Medially rotated arm
Extended elbow
excessive angle between the shoulder and neck

44

What is a condition of a break in the inferior plexus?

Klumpke Palsy

45

What are the symptoms of Klumpke Palsy?

Avulsion of the lower roots affects the small muscles within the hand, and a claw hand results.

46

What does the suprascapular nerve stem from?

Superior trunk, C5,6

47

What does the long thoracic nerve stem from?

C5,6,7

48

What does the thoracodorsal nerve stem from?

Posterior cord, C678

49

What does the long thoracic nerve supply/

Serratous anterior - keeps scapula in place otherwise get winged scapula

50

What does the suprascapular nerve supply?

Supraspinatus and infraspinatus