Cutaneous Nerves and Drainage

Question 0

What nerve supplies the arm laterally?

Answer 0

C5

Question 1

What nerves supply the region at the base of the neck, extending laterally over the shoulder?

Answer 1

C3 and C4

Question 2

What nerve supplies the forearm laterally and the thumb?

Answer 2

C6

Question 3

What does dermatome C7 supply?

Answer 3

the middle and ring fingers (or the middle three fingers) and the middle of the posterior surface of the thumb

Question 4

What does dermatome C8 supply?

Answer 4

the little finger, the medial side of the hand, and the forearm

Question 5

What supplies the middle of the forearm to the axilla?

Answer 5

T1

Question 6

What does dermatome T2 supply?

Answer 6

a small part of the arm and the skin of the axilla

Question 7

What is the brachial plexus?

Answer 7

a major nerve network formed by the anterior rami of the C5-T1 spinal nerves

Question 8

Most cutaneous nerves of the upper limb are derived from what?

Answer 8

brachial plexus

Question 9

The cutaneous nerves to the shoulder are derived from what?

Answer 9

cervical plexus

Question 10

What is the cervical plexus?

Answer 10

a nerve network consisting of series of nerve loops formed between adjacent anterior rami of the first four cervical nerves

Question 11

What are the segments of the supraclavicular nerves?

Answer 11

C3 and C4

Question 12

What does the supraclavicular nerves innervate?

Answer 12

the skin over clavicle and superolateral aspect of the pectoralis major

Question 13

What are the segments of the posterior cutaneous nerve of the arm?

Answer 13

C5-C8

Question 14

Which nerves are branches of the radial nerve?

Answer 14

posterior cutaneous nerve of the arm, posterior cutaneous nerve of the forearm, and inferior lateral cutaneous nerve of the arm

Question 15

What does the posterior cutaneous nerve of the arm innervate?

Answer 15

the skin on the posterior surface of the arm

Question 16

What are the segments of the posterior cutaneous nerve of the forearm?

Answer 16

C5-C8

Question 17

What does the posterior cutaneous nerve of the forearm innervate?

Answer 17

the skin on the posterior surface of the forearm

Question 18

What are the segments of the superior lateral cutaneous nerve of the arm?

Answer 18

C5 and C6

Question 19

What nerve is the terminal branch of the axillary nerve?

Answer 19

superior lateral cutaneous nerve of the arm

Question 20

What does the superior lateral cutaneous nerve of the arm innervate?

Answer 20

the skin over the lower part of the deltoid and on the lateral side of the midarm

Question 21

What are the segments of the inferior lateral cutaneous nerve of the arm?

Answer 21

C5 and C6

Question 22

What does the inferior lateral cutaneous nerve of the arm innervate?

Answer 22

the skin over the inferolateral aspect of the arm

Question 23

What are the segments of the lateral cutaneous nerve of the forearm?

Answer 23

C6 and C7

Question 24

What does the lateral cutaneous nerve of the forearm innervate?

Answer 24

the skin on the lateral side of the forearm

Question 25

What nerve is the terminal branch of the musculocutaneous nerve?

Answer 25

lateral cutaneous nerve of the forearm

Question 26

What are the segments of the medial cutaneous nerve of the arm?

Answer 26

C8-T2

Question 27

From where does the medial cutaneous nerve of the arm and the forearm arise?

Answer 27

medial cord of the brachial plexus

Question 28

What does the medial cutaneous nerve of the arm innervate?

Answer 28

the skin on the medial side of the arm

Question 29

What nerve unites in the axilla with the lateral cutaneous branch of the 2nd intercostal nerve?

Answer 29

medial cutaneous nerve of the arm

Question 30

What are the segments of the intercostobrachial nerve?

Answer 30

T2

Question 31

The intercostobrachial nerve is a branch of what?

Answer 31

2nd intercostal nerve

Question 32

What does the intercostobrachial nerve innervate?

Answer 32

skin on the medial surface of the arm

Question 33

What are the segments of the medial cutaneous nerve of the forearm?

Answer 33

C8 and T1

Question 34

What does the medial cutaneous nerve of the forearm innervate?

Answer 34

the skin on the anterior and medial surfaces of the forearm

Question 35

What forms the floor of the axilla?

Answer 35

axillary fascia

Question 36

What supports the axillary fascia and pulls it and the skin inferior to it upward during abduction of the arm?

Answer 36

suspensory ligament of axilla

Question 37

What forms the base of the palmar aponeurosis?

Answer 37

superficial transverse metacarpal ligament

Question 38

What are the main superficial veins of the upper limb?

Answer 38

cephalic and basilic veins

Question 39

What forms communications between the superficial and deep veins?

Answer 39

perforating veins

Question 40

Where do the cephalic and basilic veins originate?

Answer 40

subcutaneous tissue on the dorsum of the hand from the dorsal venous network

Question 41

What are the main superficial veins of the upper limb?

Answer 41

cephalic and basilic veins

Question 42

Where do the cephalic and basilic veins orginate?

Answer 42

subcutaneous tissue on the dorsum of the hand from the dorsal venous network

Question 43

What are perforating veins?

Answer 43

form communications between superficial and deep veins

Question 44

What is the course of the cephalic vein?

Answer 44

ascends along lateral wrist, forearm and arm, passes between the deltoid and the pectoralis major (deltopectoral groove), and enters the clavipectoral triangle

Question 45

Where does the cephalic vein terminate?

Answer 45

axillary vein

Question 46

What is the course of the median cubital vein?

Answer 46

communicates with the cephalic vein anterior to the elbow, passes obliquely across anterior elbow, and joins basilic vein

Question 47

What is the course of the basilic vein?

Answer 47

ascends along medial forearm, runs parallel to brachial artery, and merges with accompanying veins of brachial artery to form the axillary vein