3.2.1. The Median Nerve

Question 1

What is the Median Nerve?

Answer 1

A Major Peripheral Nerve of the Upper Limb

Question 2

Where does the Median Nerve arise?

Answer 2

In the Axilla

Question 3

What does the Median Nerve arise from?

Answer 3

1. Medial Cord of the Brachial Plexus

2. Lateral Cord of the Brachial Plexus

Question 4

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

Answer 4

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

Question 5

Where does the Median Nerve travel in the Upper Arm?

Answer 5

1. Descends along the Lateral Side of the Axillary Artery and Upper Part of the Brachial Artery
2. Crosses to the Medial side of the Brachial Artery
3. Enters the Cubital Fossa

Question 6

Does the Median Nerve supply any Muscles in the Upper Arm?

Answer 6

No, nothing above the Forearm

Question 7

Where does the Median Nerve travel between in the Forearm?

Answer 7

1. Flexor Digitorum Profundus

2. Flexor Digitorum Superficialis

Question 8

How many Branches does the Median Nerve give off in the Forearm?

Answer 8

2

Question 9

What are the Branches the Median Nerve gives off in the Forearm?

Answer 9

1. Anterior Interosseous Nerve

2. Palmar Cutaneous Nerve

Question 10

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

Answer 10

Via the Carpal Tunnel

Question 11

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

Answer 11

It Terminates, Bifurcating into 2 Nerves

Question 12

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

Answer 12

1. Recurrent Branch of the Median Nerve

2. Palmar Digital Branch of the Median Nerve

Question 13

Does the Median Nerve transmit:

1. Motor Information?
2. Sensory Information?

Answer 13

1. Yes

2. Yes

Question 14

What Muscle Groups does the Median Nerve Supply?

Answer 14

1. Majority of the Muscles of the Anterior Compartment of the Forearm
2. Some Intrinsic Muscles of the Hand

Question 15

What Muscles Groups does the Median Nerve directly innervate in the Anterior Compartment of the Forearm?

Answer 15

1. Superficial Muscles of the Anterior Forearm

2. Intermediate Muscles of the Anterior Forearm

Question 16

What are the Superficial Muscles of the Anterior Forearm, supplied by the Median Nerve?

Answer 16

1. Palmaris Longus
2. Flexor Carpi Radialis
3. Pronator Teres

Question 17

What is the Intermediate Muscle of the Anterior Forearm, supplied by the Median Nerve?

Answer 17

Flexor Digitorum Superficialis

Question 18

What Motor Nerve Branches off of the Median Nerve in the Forearm?

Answer 18

Anterior Interosseous Branch of the Median Nerve

Question 19

What Muscle Group does the Anterior Interosseous Branch of the Median Nerve innervate?

Answer 19

Deep Muscles of the Anterior Compartment of the Forearm

Question 20

What are the Deep Muscles of the Anterior Forearm, supplied by the Median Nerve?

Answer 20

1. Lateral Half of the Flexor Digitorum Profundus
2. Flexor Pollicis Longus
3. Pronator Quadratus

Question 21

What is the Medial Half of the Flexor Digitorum Profundus Innervated by?

Answer 21

Ulnar Nerve

Question 22

What are the general functions of the Forearm Muscles, supplied by the Median Nerve and the Anterior Interosseous Branch of the Median Nerve?

Answer 22

1. Pronation of the Forearm
2. Flexion of the Wrist
3. Flexion of the Digits of the Hand

Question 23

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

Answer 23

1. Recurrent Branch of the Median Nerve

2. Palmar Digital Branch of the Median Nerve

Question 24

What does the Recurrent Branch of the Median Nerve innervate?

Answer 24

Thenar Muscles of the Hand

Question 25

What are the Thenar Muscles associated with?

Answer 25

Movement of the Thumb

Question 26

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

Answer 26

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

Question 27

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

Answer 27

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 28

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

Answer 28

Hand

Question 29

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

Answer 29

1. Palmar Cutaneous Branch of the Median Nerve

2. Palmar Digital Cutaneous Branch of the Median Nerve

Question 30

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

Answer 30

Forearm

Question 31

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

Answer 31

Into the Hand from the Forearm

Question 32

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

Answer 32

No

Question 33

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

Answer 33

It is Spared in Carpal Tunnel Syndrome

Question 34

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

Answer 34

Lateral Aspect of the Palm

Question 35

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

Answer 35

Hand

Question 36

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

Answer 36

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

2. Fingertips of the Lateral 3 1/2 Digits

Question 37

What is the relationship of the Brachial Artery to the Median Nerve in the Cubital Fossa?

Answer 37

The Median Nerve is Medial to the Brachial Artery