Cutaneous Nerves and Forearm Nerves

Question 0

Posterior cutaneous nerve of the arm

Answer 0

C5-C8 - branch of the radial nerve and supplies the skin on the posterior surface of the arm

Question 1

Supraclavicular nerve

Answer 1

C3,C4 - supplies the skin over the clavicle and the superolateral aspect of the pec major

Question 2

Posterior cutaneous nerve of the forearm

Answer 2

C5-C8 - branch of the radial nerve and supplies the skin on the posterior surface of the forearm

Question 3

Superior lateral cutaneous nerve of the arm

Answer 3

C5,C6 - terminal branch of the axillary nerve and supplies the skin over the lower part of this muscle and on the lateral side of the midarm

Question 4

Inferior lateral cutaneous nerve of the arm

Answer 4

C5,C6 - branch of the radial nerve and supplies the skin over the inferolateral aspect of the arm

Question 5

Lateral cutaneous nerve of the forearm

Answer 5

C6,C7 - terminal branch of the musculocutaneous nerve and supplies the skin on the lateral side of the forearm

Question 6

Medial cutaneous nerve of the arm

Answer 6

C8-T2 - arises from the medial cord of the brachial plexus and supplies the skin on the medial side of the arm

Question 7

Intercostobrachial nerve

Answer 7

T2 - lateral cutaneous branch of the second intercostal nerve and supplies the skin on the medial surface of the arm

Question 8

Medial cutaneous nerve of the forearm

Answer 8

C8-T1 - arises from the medial cord of the brachial plexus and supplies the skin on the anterior and medial surfaces of the forearm

Question 9

Palmar cutaneous nerves - peripheral nerve distribution

Answer 9

Anterior aspect: pinky side = ulnar nerve, thumb side = median nerve, and below thumb = radial nerve (superficial branch)

Posterior (dorsal) aspect: pinky side = ulnar nerve, thumb side = radial nerve, and fingertips = median nerve

Question 10

What are the two branches of the radial nerve?

Answer 10

Superficial branch (sensory information) and deep branch which turns into posterior interosseous nerve (motor information)

Question 11

What are the two branches of the median nerve?

Answer 11

Palmar cutaneous branch and anterior interosseous nerve

Question 12

What are the two branches of the ulnar nerve?

Answer 12

Dorsal cutaneous branch and the palmar cutaneous branch

Question 13

What do the radial and ulnar arteries come to form in the hand?

Answer 13

Superficial palmar arch and deep palmar arch

Question 14

What are the two branches of the ulnar and radial nerve and artery in the hand?

Answer 14

Common palmar digital artery and nerve and proper palmar digital artery and nerve

Question 15

What would happen to the patient if the superficial branch of the radial nerve were cut?

Answer 15

Patient would lose sensory innervation in the dorsum of the hand