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Aaron ANATOMY - MSK (Upper Limb) > 3.4.7. Nerves of the Hand > Flashcards

3.4.7. Nerves of the Hand Flashcards

1
Q

What are the 3 Nerves associated with the Hand?

A
  1. Radial Nerve
  2. Median Nerve
  3. Ulnar Nerve
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2
Q

Which of the 3 Nerves associated with the Hand, only provides Sensory innervation?

A

Radial Nerve

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3
Q

What is the Segmental (or Root) Value of the Raidal Nerve?

A
  1. C5
  2. C6
  3. C7
  4. C8
  5. T1
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4
Q

Other than in the Hand, where else does the Radial Nerve provide Sensory innervation of?

A

Posterior Side of the Forearm

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5
Q

What are the 4 Branches of the Radial Nerve, which provide Cutaneous Innervation of the Upper Limb?

A
  1. Lower Lateral Cutaneous Nerve of the Arm
  2. Posterior Cutaneous Nerve of the Arm
  3. Posterior Cutaneous Nerve of the Forearm
  4. Superficial Branch of the Radial Nerve
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6
Q

Which of the 4 Radial Nerve Branches, which provides Cutaneous Innervation, is associated with the Hand?

A

Superficial Branch of the Radial Nerve

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7
Q

Where does the (Terminal) Superficial Branch of the Radial Nerve, branch off?

A

Just Distal to the Cubital Fossa

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8
Q

Where, on the Palm, does the Superficial Branch of the Radial Nerve provide sensory innervation?

A
  1. Dorsal Surface of the Lateral 3 1/2 Digits

2. Their Associated Palm Area

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9
Q

Which Nerves are Responsible for Motor innervation in the Hand?

A
  1. Median Nerve

2. Ulnar Nervw

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10
Q

What is the Segmental (or Root) Value of the Median Nerve?

A
  1. C5
  2. C6
  3. C7
  4. C8
  5. T1
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11
Q

How does the Median Nerve travel to enter into the Hand?

A

Via the Carpal Tunnel

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12
Q

What happens to the Median Nerve as it enters into the Hand?

A

It Terminates, Bifurcating into 2 Nerves

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13
Q

What are the Nerves the Median Nerve Bifurcates into as it Terminates?

A
  1. Recurrent Branch of the Median Nerve

2. Palmar Digital Branch of the Median Nerve

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14
Q

Does the Median Nerve transmit:

  1. Motor Information?
  2. Sensory Information?
A
  1. Yes

2. Yes

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15
Q

Which of the Nerves the Median Nerve Bifurcates into as it Terminates, supply Motor Innervation?

A

Both:

  1. Recurrent Branch of the Median Nerve
  2. Palmar Digital Branch of the Median Nerve
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16
Q

What does the Recurrent Branch of the Median Nerve innervate?

A

Thenar Muscles of the Hand

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17
Q

What are the Thenar Muscles associated with?

A

Movement of the Thumb

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18
Q

What does the Palmar Digital Branch of the Median Nerve innervate?

A

Lateral 2 Lumbrical Muscles of the Hand - Index and Middle Fingers

19
Q

What are the Lateral 2 Lumbrical Muscles of the Hand associated with?

A
  1. Flexion of the Metacarpophalangeal Joints of the Index and Middle Fingers
  2. Extension of the Interphalangeal Joints of the Index and Middle Fingers
20
Q

Where is the Sensory Information from the Median Nerve recieved from?

A

Hand

21
Q

What are the 2 Branches of the Median Nerve which will recieve Sensory Information?

A
  1. Palmar Cutaneous Branch of the Median Nerve

2. Palmar Digital Cutaneous Branch of the Median Nerve

22
Q

Where does the Palmar Cutaneous Branch of the Median Nerve Originate from?

A

Forearm

23
Q

Where does the Palmar Cutaneous Branch of the Median Nerve travel?

A

Into the Hand from the Forearm

24
Q

Does the Palmar Cutaneous Branch of the Median Nerve travel through the Carpal Tunnel?

A

No

25
Q

What is the Clinical Significance of the Palmar Cutaneous Branch of the Median Nerve not travelling through the Carpal Tunnel?

A

It is Spared in Carpal Tunnel Syndrome

26
Q

Where does the Palmar Cutaneous Branch of the Median Nerve recieve Sensory Information from?

A

Lateral Aspect of the Palm

27
Q

Where does the Palmar Digital Cutaneous Branch of the Median Nerve Originate from?

A

Hand

28
Q

Where does the Palmar Digital Cutaneous Branch of the Median Nerve recieve Sensory Information from?

A
  1. Palmar Surface of the Lateral 3 1/2 Digits

2. Fingertips of the Lateral 3 1/2 Digits

29
Q

What is the Segmental (or Root) Value of the Ulnar Nerve?

A
  1. C8

2. T1

30
Q

Where does the Ulnar Nerve travel at the Wrist?

A

Superficially to the Flexor Retinaculum

31
Q

How does the Ulnar Nerve enter into the Hand?

A

Via the Ulnar Canal

32
Q

What is the Ulnar Canal also known as?

A

Guyon’s canal

33
Q

What happens to the Ulnar Nerve in the Hand?

A

It Terminates, Bifurcating into 2 Nerves

34
Q

What are the Nerves the Ulnar Nerve Bifurcates into, as it Terminates?

A
  1. Superficial Branches of the Ulnar Nerve

2. Deep Branches of the Ulnar Nerve

35
Q

Which of the Ulnar Nerve Branches (as it Bifurcate) supplies Motor Innervation?

A

Deep Branches of the Ulnar Nerve

36
Q

What Muscles of the Hand are innervated by the Deep Branches of the Ulnar Nerve?

A
  1. Hypothenar Muscles
  2. Medial 2 Lumbrical Muscles (Ring and Little Finger)
  3. Adductor Pollicis
  4. Interossei of the Hand
  5. Palmar Brevis
37
Q

What are the Hypothenar Muscles associated with?

A
  1. Medial aspect of the Palm

2. Little finger

38
Q

How many Branches of the Ulnar Nerve are responsible for Sensory Cutaneous Innervation?

A

3

39
Q

What are the Branches of the Ulnar Nerve are responsible for Sensory Cutaneous Innervation?

A
  1. Palmar Cutaneous Branch of the Ulnar Nerve
  2. Dorsal Cutaneous Branch of the Ulnar Nerve
  3. Superficial Branch of the Ulnar Nerve
40
Q

Which 2 Branches of the Ulnar Nerve are responsible for Sensory Cutaneous Innervation arise in the Forearm?

A
  1. Palmar Cutaneous Branch of the Ulnar Nerve

2. Dorsal Cutaneous Branch of the Ulnar Nerve

41
Q

Which Branches of the Ulnar Nerve are responsible for Sensory Cutaneous Innervation arise in the Hand?

A

Superficial Branch of the Ulnar Nerve

42
Q

Which part of the Hand does the Palmar Cutaneous Branch of the Ulnar Nerve, recieve Sensory Information from?

A

Skin on the Medial Half of the Palm

43
Q

Which part of the Hand does the Dorsal Cutaneous Branch of the Ulnar Nerve, recieve Sensory Information from?

A

Skin of the Medial 1 1/2 Fingers, and the associated Dorsal Hand Area

44
Q

Which part of the Hand does the Superficial Branch of the Ulnar Nerve, recieve Sensory Information from?

A

Palmar Surface of the Medial 1 1/2 Fingers

Aaron ANATOMY - MSK (Upper Limb) (48 decks)

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