Cutaneous Nerves of Upper Limb

Question 0

C5 nerve supplies

Answer 0

arm laterally (i.e., superior aspect of abducted limb)

Question 1

C3 and C4 supply

Answer 1

Region at base of neck, extending laterally over shoulder

Question 2

C6 nerve supplies

Answer 2

forearm laterally and the thumb

Question 3

C7 nerve supplies

Answer 3

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

Question 4

Posterior cutaneous nerve of arm (C5-C8)

Answer 4

branch of radial nerve, supplies skin on the posterior surface of the arm

Question 5

Posterior cutaneous nerve of forearm (C5-C8)

Answer 5

branch of radial nerve, supplies the skin on the posterior surface of the forearm

Question 6

Superior lateral cutaneous nerve of arm (C5, C6)

Answer 6

terminal branch of axillary nerve, emerges from beneath the posterior margin of the deltoid to supply the skin over the lower part of this muscle and on the lateral side of the midarm

Question 7

Inferior lateral cutaneous nerve of arm (C5, C6)

Answer 7

branch of radial nerve, supplies skin over the inferolateral aspect of arm; frequently a branch of the posterior cutaneous nerve of forearm

Question 8

Lateral cutaneous nerve of forearm (C6, C7)

Answer 8

terminal branch of muscutaneous nerve, supplies skin on lateral side of forearm

Question 9

Medial cutaneous nerve of arm (C8-T2)

Answer 9

arises from the medial cord of the brachial plexus, often uniting in the axilla with the lateral cutaneous branch of the second intercostal nerve - it supplies skin on medial side of arm

Question 10

Intercostobrachial nerve (T2)

Answer 10

lateral cutaneous branch of second intercostal nerve, also contributes to the innervation of the skin on the medial surface of the arm

Question 11

Medial cutaneous nerve of forearm (C8, T1)

Answer 11

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