Cutaneous Nerves of the Arm and Forearm

Question 0

What are the segments of the posterior nerve of the arm, and what does it supply?

Answer 0

C5-C8 (branch of radial nerve)

supplies the skin on the posterior surface of the arm

Question 1

What are the segments of the supraclavicular nerve and what does it supply?

Answer 1

C3, C4

supply the skin over the clavicle and the superolateral aspect of the pectoralis major

Question 2

What are the segments of the posterior cutaneous nerve of the forearm, and what does it supply?

Answer 2

C5-C8 (branch of radial nerve)

supplies the skin on the posterior surface of the forearm

Question 3

What are the segments of the superior lateral cutaneous nerve of the arm, and what does it supply?

Answer 3

C5, C6 (terminal branch of axillary nerve)

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

Question 4

What are the segments of the inferior lateral cutaneous nerve of the forearm, and what does it supply?

Answer 4

C5, C6 (branch of radial nerve)
supplies the skin over the inferolateral aspect of the arm, it is frequently a branch of the posterior cutaneous nerve of the forearm

Question 5

What are the segments of the lateral cutaneous nerve of the forearm, and what does it supply?

Answer 5

C6, C7 (terminal branch of Musculocutaneous nerve)

supplies the skin on the lateral side of the forearm

Question 6

What are the segments of the medial cutaneous nerve of the arm, and what does it supply?

Answer 6

C8-T2 (medial cord of brachial plexus)

supplies skin on the medial side of the arm

Question 7

What are the segments of the Intercostobrachial nerve, and what does it supply?

Answer 7

T2 (lateral cutaneous branch of the second intercostal nerve)
contributes to the innervation of the skin on the medial surface of the arm

Question 8

What are the segments of the medial cutaneous nerve of the forearm, and what does it supply?

Answer 8

C8, T1 (arises from medial cord of brachial plexus)

supplies the skin on the anterior and medial surfaces of the forearm