3.2.2. The Ulnar Nerve Flashcards Preview

3rd Year - MSK Upper Limb Anatomy > 3.2.2. The Ulnar Nerve > Flashcards

Flashcards in 3.2.2. The Ulnar Nerve Deck (34)
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1
Q

Which Cord does the Ulnar Nerve arise from?

A

Medial Cord of the Brachial Plexus

2
Q

What does the Ulnar Artery descend alongside?

A

Brachial Artery

3
Q

Which side of the Brachial Artery does the Ulnar Nerve descend alongside?

A

Medial Side

4
Q

Which compartment does the Ulnar Nerve enter?

A

Posterior Compartment

5
Q

How does the Ulnar Nerve enter the Posterior Compartment?

A

Through the Medial Intermuscular Septum

6
Q

Where does the Ulnar Nerve travel in the Upper Arm?

A
  1. It runs along the Medial Head of the Tricep Brachii

2. It runs to the back of the Medial Epicondyle

7
Q

Does the Ulnar Nerve innervate any Muscles in the Upper Arm?

A

No - Only the Forearm and Below

8
Q

How does the Ulnar Nerve enter into the Forearm?

A

Pierces the 2 Heads of the Flexor Carpi Ulnaris

9
Q

Where does the Ulnar Nerve travel in the Forearm?

A

Alongside the Ulna

10
Q

How many Branches of the Ulnar Nerve Arise in the Forearm?

A

3

11
Q

What are the Branches of the Ulnar Nerve Arise in the Forearm?

A
  1. Muscular Branch of the Ulnar Nerve
  2. Palmar Cutaneous Branch of the Ulnar Nerve
  3. Dorsal Cutaneous Branch of the Ulnar Nerve
12
Q

Where does the Ulnar Nerve travel at the Wrist?

A

Superficially to the Flexor Retinaculum

13
Q

How does the Ulnar Nerve enter into the Hand?

A

Via the Ulnar Canal

14
Q

What is the Ulnar Canal also known as?

A

Guyon’s canal

15
Q

What happens to the Ulnar Nerve in the Hand?

A

It Terminates, Bifurcating into 2 Nerves

16
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

17
Q

Where does the Ulnar Nerve innervate Muscles?

A
  1. Anterior Compartment of the forearm

2. Hand

18
Q

What Muscles in the Anterior Compartment of the Forearm are supplied by the Ulnar Nerve?

A
  1. Flexor Carpi Ulnaris

2. Medial Half of the Flexor Digitorum Profundus

19
Q

What are the functions of the Flexor Carpi Ulnaris?

A
  1. Flexes the Hand at the Wrist

2. Adducts the Hand at the Wrist

20
Q

What is the function of the Medial Half of the Flexor Digitorum Profundus?

A

Flexion of the Fingers Medial 2 Fingers - Ring and Little Finger

21
Q

What are the rest of the Muscles of the Anterior Compartment of the Forearm supplied by?

A

The Median Nerve

22
Q

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

A

Deep Branches of the Ulnar Nerve

23
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
24
Q

What are the Hypothenar Muscles associated with?

A
  1. Medial aspect of the Palm

2. Little finger

25
Q

What are the other Muscles of the Hand innervated by?

A

Median Nerve

26
Q

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

A

3

27
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
28
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

29
Q

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

A

Superficial Branch of the Ulnar Nerve

30
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

31
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

32
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

33
Q

What is the relationship of the Ulnar Artery and Ulnar Nerve during their course in the Forearm?

A

The Ulnar Nerve is Medial to the Ulnar Artery

34
Q

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

A
  1. C8

2. T1

Decks in 3rd Year - MSK Upper Limb Anatomy Class (48):