3.2.2. The Ulnar Nerve

Question 1

Which Cord does the Ulnar Nerve arise from?

Answer 1

Medial Cord of the Brachial Plexus

Question 2

What does the Ulnar Artery descend alongside?

Answer 2

Brachial Artery

Question 3

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

Answer 3

Medial Side

Question 4

Which compartment does the Ulnar Nerve enter?

Answer 4

Posterior Compartment

Question 5

How does the Ulnar Nerve enter the Posterior Compartment?

Answer 5

Through the Medial Intermuscular Septum

Question 6

Where does the Ulnar Nerve travel in the Upper Arm?

Answer 6

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

2. It runs to the back of the Medial Epicondyle

Question 7

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

Answer 7

No - Only the Forearm and Below

Question 8

How does the Ulnar Nerve enter into the Forearm?

Answer 8

Pierces the 2 Heads of the Flexor Carpi Ulnaris

Question 9

Where does the Ulnar Nerve travel in the Forearm?

Answer 9

Alongside the Ulna

Question 10

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

Answer 10

3

Question 11

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

Answer 11

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

Question 12

Where does the Ulnar Nerve travel at the Wrist?

Answer 12

Superficially to the Flexor Retinaculum

Question 13

How does the Ulnar Nerve enter into the Hand?

Answer 13

Via the Ulnar Canal

Question 14

What is the Ulnar Canal also known as?

Answer 14

Guyon’s canal

Question 15

What happens to the Ulnar Nerve in the Hand?

Answer 15

It Terminates, Bifurcating into 2 Nerves

Question 16

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

Answer 16

1. Superficial Branches of the Ulnar Nerve

2. Deep Branches of the Ulnar Nerve

Question 17

Where does the Ulnar Nerve innervate Muscles?

Answer 17

1. Anterior Compartment of the forearm

2. Hand

Question 18

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

Answer 18

1. Flexor Carpi Ulnaris

2. Medial Half of the Flexor Digitorum Profundus

Question 19

What are the functions of the Flexor Carpi Ulnaris?

Answer 19

1. Flexes the Hand at the Wrist

2. Adducts the Hand at the Wrist

Question 20

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

Answer 20

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

Question 21

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

Answer 21

The Median Nerve

Question 22

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

Answer 22

Deep Branches of the Ulnar Nerve

Question 23

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

Answer 23

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

Question 24

What are the Hypothenar Muscles associated with?

Answer 24

1. Medial aspect of the Palm

2. Little finger

Question 25

What are the other Muscles of the Hand innervated by?

Answer 25

Median Nerve

Question 26

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

Answer 26

3

Question 27

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

Answer 27

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

Question 28

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

Answer 28

1. Palmar Cutaneous Branch of the Ulnar Nerve | 2. Dorsal Cutaneous Branch of the Ulnar Nerve

Question 29

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

Answer 29

Superficial Branch of the Ulnar Nerve

Question 30

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

Answer 30

Skin on the Medial Half of the Palm

Question 31

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

Answer 31

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

Question 32

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

Answer 32

Palmar Surface of the Medial 1 1/2 Fingers

Question 33

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

Answer 33

The Ulnar Nerve is Medial to the Ulnar Artery

Question 34

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

Answer 34

1. C8 | 2. T1