Brachial Plexus

Question 1

Roots of axillary nerve

Answer 1

C5 & C6

Question 2

Motor function of axillary nerve

Answer 2

Innervates deltoid, teres minor and the long head of triceps brachii

Question 3

Gives off the superior lateral cutaneous nerve of arm

Answer 3

Axillary nerve

Question 4

Innervates most of the flexor muscles in the forearm, the thenar muscles, and the two lateral lumbrical muscles that move the index and middle fingers

Answer 4

Median nerve

Question 5

Motor functions of median nerve

Answer 5

Innervates most of the flexor muscles of the forearm, the thenar muscles and the two lateral lumbrical muscles that move the index and middle fingers

Question 6

Gives off the palmar cutaneous branch

Answer 6

Median nerve

Question 7

Sensory function of the median nerve

Answer 7

Gives off the palmar cutaneous branch, which innervates the lateral part of the palm, and the digital cutaneous branch

Question 8

Innervates the posterior aspect of the arm and forearm, and the posterior lateral aspect of the hand

Answer 8

Radial nerve

Question 9

Innervates the triceps brachii, and the extensor muscles in the posterior compartment of the forearm

Answer 9

Radial nerve

Question 10

Innervates the muscles of the hand (apart from the thenar muscles and two lateral lumbricals), flexor carpi ulnaris and medial half of flexor digitorum

Answer 10

Ulnar nerve