Nerves of the Upper Limb Flashcards Preview

Hugh's MD1 Musculo-Skeletal > Nerves of the Upper Limb > Flashcards

Flashcards in Nerves of the Upper Limb Deck (52)
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1

Which divisions make the lateral cord?

Ant div. of the sup and middle trunk

2

Where is the median nerve susceptable to damage?

In the carpal tunnel

2

What is the cutaneous innervation of the median nerve?

Lateral 3 and a half fingers and corresponding palmar skin

Lateral 3 and half finger's nail beds (at least) on the dorsal side

3

Where does the axillary nerve emerge from posteriorly?

Above the teres minor

4

What is the course of the musculocutaneous nerve?

Pierces the coracobrachialis

Runs in the flexor compartment of arm (in between biceps and brachialis)

Pass ant of elbow and runs in the latero-superficial

 

4

What is innervated by the musculocutaneous nerve?

Flexor muscles of the arm

Lateral skin of the forearm

4

Which muscles does the ulnar nerve supply?

Forearm: FCU and medial aspect of FDP

Hand: All the muscles of the hand except those supplied by the median nerve

5

What is the cutaneous innervation of the ulnar nerve?

Median 1 and a half fingers and their corresponding palm and dorsum

6

Where does the radial nerve run in the arm?

Emerges from under teres minor

Runs medial to lateral

Tucks under cover of brachioradialis

6

What supplies the lateral aspect of the skin of the upper limb?

Axillary > Radial > Musculocutaneous (ARM)

7

Where do nerves of the limb bud branch from the distribution of spinal nerves?

Lat. cutaneous branch

7

What is the course of the median nerve in the forearm?

Under the fibrous arch of the FDS 

Runs down in between FDS and FDP

Through the carpal tunnel

7

Will a fracture of the humerus effect the triceps muscle?

No, because it is innervated by the radial nerve right after it emerges from the teres minor

8

What is the cutaneous innervation of the radial nerve?

Poster aspect of the upper limb including the dorsal aspect of the lateral 3.5 fingers (except their nail beds)

9

What are the roots of the musculocutaneous nerve?

C5,6 and 7

10

How are the cords named?

By their relation with the axillary a. 

11

Which divisions make the medial cord?

Ant division of the inferior trunk

11

Which muscles of the hand does the median nerve supply?

Thenar and lateral 2 lumbricals

13

Which muscles do the median and ulnar nerves supply?

Flexors of the forearm and hand

14

What are the rami supply of the skin of the upper limb?

C4 - T1

15

What nerves originate from the posterior cord?

Axillary and radial

15

What are the rami of the axillary nerve?

C5 and 6

17

Where are the divisions of the BP located?

Under the clavicle

19

What nerves originate from the lateral cord?

Musculocutaneous and half the median nerve

20

Which muscles does the radial nerve supply?

All extensors in the upper limb

21

T/F The superficial branch of the radial nerve supplies the ECR

False, it has no motor supply

22

Which muscles does the axillary nerve supply?

Teres minor and deltoids

24

Which rami make the middle trunk?

C7

26

Which muscles does the radial nerve supply?

All extensors of the upper limb

27

What do the anterior division of the BP supply?

The flexor compartments and their overlying skin

27

Which divisions make up the posterior cord?

Post div. of the sup, middle and inferior trunks

27

What is the course of the radial nerve in the forearm?

Split into superficial and deep branches

- Superficial doesn't enter the brachoradialis, instead running superficial and over the extensor retinaculum

- Deep passes through the supinator and runs down

28

What skins does the axillary nerve supply?

Skin overlying deltoid

30

What do the posterior divisions supply?

Extensor muscles and overlying skin

31

What are the roots of the ulnar nerve?

(C7) C8 and T1

33

What is the hierarchy of nomenclature in the brachial plexus from proximal to distal (eg root vs cords etc)

Root > Trunk > Ant/Post division > Cords > Peripheral nerves

34

Which nerves originate from the medial cord?

Ulnar and half the median

35

When can the axillary nerve be damaged?

Shoulder dislocation

37

What is the course of the ulnar nerve in the forearm?

Through the 2 heads of the FCU

Runs over FCU and on medial aspect of FDP

Runs over the flexor retinaculum

39

Which rami make the superior trunk?

C5,6

40

What are the roots of the median nerve?

C5,6,7,8 and T1

41

Which forearm muscles does the median nerve supply?

All except FCU and medial half of FDP

42

When is the radial nerve exposed to damage?

Humerus fracture

Ill fitting crutch

44

What is the course of the ulnar nerve in the arm?

Medial to the brachial a. 

Behind the medial epicondyle

45

What is the course of the median nerve in the arm?

Ant to the brachial a. til it ends up lying medial 

Ant to the elbow joint

46

Which rami make the inferior trunk?

C8 T1

47

Which rami usually make the brachial plexus?

C5,6,7,8, T1

48

Which nerves can sometimes be confused for the ulnar nerve?

Medial brachial cutaneous nerve of arm

Medial antebrachial cutaneous nerve of the forearm

49

How can you find the musculocutaneous nerve?

It pierces the coracobrachialis muscle

50

Where are potential locations of ulnar nerve damage?

Medial epicondyle

Wrist

51

Where are the roots and trunks of the brachial plexus located?

Supraclavicular

52

Where are the cords and terminal branches of the BP located?

Infraclavicular