3.4.7. Nerves of the Hand

Question 1

What are the 3 Nerves associated with the Hand?

Answer 1

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

Question 2

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

Answer 2

Radial Nerve

Question 3

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

Answer 3

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

Question 4

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

Answer 4

Posterior Side of the Forearm

Question 5

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

Answer 5

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

Question 6

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

Answer 6

Superficial Branch of the Radial Nerve

Question 7

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

Answer 7

Just Distal to the Cubital Fossa

Question 8

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

Answer 8

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

2. Their Associated Palm Area

Question 9

Which Nerves are Responsible for Motor innervation in the Hand?

Answer 9

1. Median Nerve

2. Ulnar Nervw

Question 10

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

Answer 10

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

Question 11

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

Answer 11

Via the Carpal Tunnel

Question 12

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

Answer 12

It Terminates, Bifurcating into 2 Nerves

Question 13

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

Answer 13

1. Recurrent Branch of the Median Nerve

2. Palmar Digital Branch of the Median Nerve

Question 14

Does the Median Nerve transmit:

1. Motor Information?
2. Sensory Information?

Answer 14

1. Yes

2. Yes

Question 15

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

Answer 15

Both:

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

Question 16

What does the Recurrent Branch of the Median Nerve innervate?

Answer 16

Thenar Muscles of the Hand

Question 17

What are the Thenar Muscles associated with?

Answer 17

Movement of the Thumb

Question 18

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

Answer 18

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

Question 19

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

Answer 19

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

Question 20

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

Answer 20

Hand

Question 21

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

Answer 21

1. Palmar Cutaneous Branch of the Median Nerve

2. Palmar Digital Cutaneous Branch of the Median Nerve

Question 22

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

Answer 22

Forearm

Question 23

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

Answer 23

Into the Hand from the Forearm

Question 24

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

Answer 24

No

Question 25

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

Answer 25

It is Spared in Carpal Tunnel Syndrome

Question 26

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

Answer 26

Lateral Aspect of the Palm

Question 27

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

Answer 27

Hand

Question 28

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

Answer 28

1. Palmar Surface of the Lateral 3 1/2 Digits | 2. Fingertips of the Lateral 3 1/2 Digits

Question 29

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

Answer 29

1. C8 | 2. T1

Question 30

Where does the Ulnar Nerve travel at the Wrist?

Answer 30

Superficially to the Flexor Retinaculum

Question 31

How does the Ulnar Nerve enter into the Hand?

Answer 31

Via the Ulnar Canal

Question 32

What is the Ulnar Canal also known as?

Answer 32

Guyon’s canal

Question 33

What happens to the Ulnar Nerve in the Hand?

Answer 33

It Terminates, Bifurcating into 2 Nerves

Question 34

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

Answer 34

1. Superficial Branches of the Ulnar Nerve | 2. Deep Branches of the Ulnar Nerve

Question 35

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

Answer 35

Deep Branches of the Ulnar Nerve

Question 36

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

Answer 36

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

Question 37

What are the Hypothenar Muscles associated with?

Answer 37

1. Medial aspect of the Palm | 2. Little finger

Question 38

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

Answer 38

3

Question 39

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

Answer 39

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

Question 40

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

Answer 40

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

Question 41

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

Answer 41

Superficial Branch of the Ulnar Nerve

Question 42

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

Answer 42

Skin on the Medial Half of the Palm

Question 43

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

Answer 43

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

Question 44

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

Answer 44

Palmar Surface of the Medial 1 1/2 Fingers