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Medicine 1 > Upper Limb Nerve > Flashcards

Upper Limb Nerve Flashcards

1
Q

Which nerve roots contribute to the brachial plexus?

A

C5, C6, C7, C8, T1

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2
Q

What are the main nerves that arise from the brachial plexus?

A

Axillary, musculocutaneous, median, ulnar, radial nerves

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3
Q

Which nerve is responsible for innervating the deltoid muscle?

A

Axillary nerve

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4
Q

Which nerve innervates the muscles of the anterior compartment of the forearm?

A

Median nerve

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5
Q

Which nerve innervates the muscles of the posterior compartment of the forearm?

A

Radial nerve

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6
Q

Which nerve innervates the intrinsic muscles of the hand?

A

Ulnar nerve

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7
Q

True or False: The brachial plexus is responsible for the innervation of the entire upper limb.

A

True

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8
Q

Which nerve is commonly injured in a ‘Saturday Night Palsy’?

A

Radial nerve

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9
Q

Which nerve is responsible for the ‘funny bone’ sensation when hit?

A

Ulnar nerve

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10
Q

Which nerve innervates the brachialis and biceps brachii muscles?

A

Musculocutaneous nerve

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11
Q

What is the brachial plexus?

A

A network of nerves that innervates the upper limb.

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12
Q

How many roots make up the brachial plexus?

A

Five roots: C5, C6, C7, C8, and T1.

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13
Q

Which nerve roots form the lateral cord of the brachial plexus?

A

C5, C6, and C7.

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14
Q

Which nerve roots form the medial cord of the brachial plexus?

A

C8 and T1.

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15
Q

Which nerve roots form the posterior cord of the brachial plexus?

A

C5, C6, C7, C8, and T1.

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16
Q

What does the musculocutaneous nerve innervate?

A

Anterior compartment of the arm.

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17
Q

What does the radial nerve innervate?

A

Posterior compartment of the arm and forearm.

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18
Q

What does the median nerve innervate?

A

Anterior compartment of the forearm and hand.

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19
Q

What does the ulnar nerve innervate?

A

Intrinsic muscles of the hand.

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20
Q

What is the most commonly injured nerve in brachial plexus injuries?

A

The axillary nerve.

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21
Q

What is the most common cause of brachial plexus injuries?

A

Trauma, such as motor vehicle accidents or sports injuries.

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22
Q

What is Klumpke’s palsy?

A

A brachial plexus injury affecting the lower roots (C8 and T1).

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23
Q

What is Erb’s palsy?

A

A brachial plexus injury affecting the upper roots (C5 and C6).

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24
Q

What is the difference between an upper and lower brachial plexus injury?

A

Upper plexus injuries affect C5 and C6 roots, while lower plexus injuries affect C8 and T1 roots.

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25
Q

What is Horner’s syndrome and how is it related to the brachial plexus?

A

Horner’s syndrome is a group of symptoms that occur when there is damage to the sympathetic nerves of the brachial plexus.

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26
Q

What is a stinger or burner injury in relation to the brachial plexus?

A

A transient injury resulting from trauma to the brachial plexus, causing a stinging or burning sensation down the arm.

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27
Q

What is the dermatome for the C5 nerve root?

A

Lateral upper arm.

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28
Q

What is the dermatome for the C6 nerve root?

A

Thumb and index finger.

29
Q

What is the dermatome for the C7 nerve root?

A

Middle finger.

30
Q

What is the dermatome for the C8 nerve root?

A

Ring and little finger.

31
Q

What is the dermatome for the T1 nerve root?

A

Medial forearm.

32
Q

What is the Allen test used for in relation to the brachial plexus?

A

To assess the patency of the ulnar and radial arteries in the hand.

33
Q

What is the Bishop’s hand deformity and how is it related to the brachial plexus?

A

A claw-like deformity of the hand due to ulnar nerve injury.

34
Q

What is the Saturday night palsy and how is it related to the brachial plexus?

A

A condition where the radial nerve is compressed, causing wrist drop and loss of sensation in the hand.

35
Q

What is the brachial plexus?

A

A network of nerves that innervates the upper limb.

36
Q

How many roots make up the brachial plexus?

A

Five roots: C5, C6, C7, C8, and T1.

37
Q

Which nerve roots form the lateral cord of the brachial plexus?

A

C5, C6, and C7.

38
Q

Which nerve roots form the medial cord of the brachial plexus?

A

C8 and T1.

39
Q

Which nerve roots form the posterior cord of the brachial plexus?

A

C5, C6, C7, C8, and T1.

40
Q

What does the musculocutaneous nerve innervate?

A

Anterior compartment of the arm.

41
Q

What does the radial nerve innervate?

A

Posterior compartment of the arm and forearm.

42
Q

What does the median nerve innervate?

A

Anterior compartment of the forearm and hand.

43
Q

What does the ulnar nerve innervate?

A

Intrinsic muscles of the hand.

44
Q

What is the most commonly injured nerve in brachial plexus injuries?

A

The axillary nerve.

45
Q

What is the most common cause of brachial plexus injuries?

A

Trauma, such as motor vehicle accidents or sports injuries.

46
Q

What is Klumpke’s palsy?

A

A brachial plexus injury affecting the lower roots (C8 and T1).

47
Q

What is Erb’s palsy?

A

A brachial plexus injury affecting the upper roots (C5 and C6).

48
Q

What is the difference between an upper and lower brachial plexus injury?

A

Upper plexus injuries affect C5 and C6 roots, while lower plexus injuries affect C8 and T1 roots.

49
Q

What is Horner’s syndrome and how is it related to the brachial plexus?

A

Horner’s syndrome is a group of symptoms that occur when there is damage to the sympathetic nerves of the brachial plexus.

50
Q

What is a stinger or burner injury in relation to the brachial plexus?

A

A transient injury resulting from trauma to the brachial plexus, causing a stinging or burning sensation down the arm.

51
Q

What is the dermatome for the C5 nerve root?

A

Lateral upper arm.

52
Q

What is the dermatome for the C6 nerve root?

A

Thumb and index finger.

53
Q

What is the dermatome for the C7 nerve root?

A

Middle finger.

54
Q

What is the dermatome for the C8 nerve root?

A

Ring and little finger.

55
Q

What is the dermatome for the T1 nerve root?

A

Medial forearm.

56
Q

What is the Allen test used for in relation to the brachial plexus?

A

To assess the patency of the ulnar and radial arteries in the hand.

57
Q

What is the Bishop’s hand deformity and how is it related to the brachial plexus?

A

A claw-like deformity of the hand due to ulnar nerve injury.

58
Q

What is the Saturday night palsy and how is it related to the brachial plexus?

A

A condition where the radial nerve is compressed, causing wrist drop and loss of sensation in the hand.

59
Q

Nerves from roots of bp

A

Dorsal scapular
Long thoracic

60
Q

Roots of axillary nerve

A

C5 c6

61
Q

Ulnar nerve root value

A

C8 T1

62
Q

Ulnar nerve root value

A

C8 T1

63
Q

Largest nerve

A
64
Q

Lon thoracic root and intervention

A

C5,6,7
Serratus anterior

65
Q

Lon thoracic root and intervention

A

C5,6,7
Serratus anterior

66
Q

Suprascapular nerve root and innervation

A

Upper trunk , infraspinatus and supraspinatus

67
Q

Palmar cutaneous nerve

A

Thenar wali skin
Not affected in carpal tunnel

68
Q

Recurrent branch of median nerve

A

Thenar muscles

Medicine 1 (4 decks)

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