Nerves Of Brachial Plexus

Question 1

Musculocutaneous roots

Answer 1

C5 C6 C7

Question 2

Musculocutaneous motor functions

Answer 2

Brachialis, biceps brachii and coracobrachialis

Question 3

Musculocutaneous sensory functions

Answer 3

Lateral cutaneous branch of forearm

Innervates anterior forearm lateral half and small portion of posterior

Question 4

Axillary nerve roots

Answer 4

C5 and C6

Question 5

Axillary nerve motor functions

Answer 5

Innervates teres minor and deltoid muscles

Question 6

Axillary nerve sensory functions

Answer 6

Superior lateral cutaneous nerve of arm (inferior region of deltoid)

Question 7

Median nerve roots

Answer 7

C6-T1

Question 8

Median nerve motor functions

Answer 8

Most of forearm flexor muscles, the ar muscles and 2 lateral lumbricals with index and middle fingers

Question 9

Median nerve sensory functions

Answer 9

Palmar cutaneous branch, lateral part of palm , digital cutaneous palm , innervates lateral 3 and a half fingers on anterior hand (palm)

Question 10

Radial nerve roots

Answer 10

C5-T1

Question 11

Radial nerve motor functions

Answer 11

Triceps brachii, muscles in posterior arm (mostly extensors)

Question 12

Radial nerve sensory functions

Answer 12

Posterior aspect of arm and forearm, posterolateral hand

Question 13

Ulnar nerve roots

Answer 13

C8 and T1

Question 14

Ulnar nerve motor functions

Answer 14

Muscles of hand apart from thenar muscles and 2 lateral lumbricals,
flexor carpi ulnaris and medial half of flexor digitorum profundus

Question 15

Ulnar nerve sensory functions

Answer 15

Anterior and posterior surfaces of medial one and a half fingers
Associated palm area