Innervation of Upper Limb

Question 1

What are BBC muscles innervated by?

Answer 1

musculocutaneous nerve

Question 2

What is the triceps innervated by?

Answer 2

Radial nerve

Question 3

What re all muscles in the posterior forearm innervated by?

Answer 3

Radial nerve

Question 4

What is the brachial plexus?

Answer 4

Network of nerve fibres that supplies the skin and musculature of the upper limb

Question 5

Good mnemonic for brachial plexus

Answer 5

Read That Damn Cadaver Book

Question 6

What does the mnemonic stand for?

Answer 6

Roots, trunks, divisions, cords, branches

Question 7

What are the roots?

Answer 7

C5, C6, C7, C8, T1

Question 8

How many trunks are there?

Answer 8

3

Question 9

What are the names of the trunks?

Answer 9

Superior, middle, inferior

Question 10

Which roots form the superior trunk?

Answer 10

C5 and C6

Question 11

Which roots form the middle trunk?

Answer 11

C7

Question 12

Which roots form the inferior trunk?

Answer 12

C8 and T1

Question 13

How many branches does each trunk divide into?

Answer 13

2, one going anteriorly (towards the front of the body) and one going posteriorly (towards the back of the body)

Question 14

Where are the cords of the brachial plexus?

Answer 14

In the axilla

Question 15

What are the three cords named relative to?

Answer 15

Their position relative to the axillary artery

Question 16

What is the lateral cord formed by?

Answer 16

Anterior division of the superior trunk

Anterior division of the middle trunk

Question 17

What is the posterior cord formed by?

Answer 17

Posterior division of the superior trunk
Posterior division of the middle trunk
Posterior division of the inferior trunk

Question 18

What is the medial cord formed by?

Answer 18

The anterior division of the inferior trunk

Question 19

Five main nerves of upper limb

Answer 19

Musculocutaneous
Axillary
Median
Radial
Ulnar

Question 20

Roots of musculocutaneous nerve

Answer 20

C5, C6, C7

Question 21

Motor functions of musculocutaneous

Answer 21

Innervates brachialis, biceps brachii and coracobrachialis

Question 22

Roots of axillary nerve

Answer 22

C5 and C6

Question 23

What does the axillary nerve innervate?

Answer 23

teres minor and deltoid

Question 24

Roots of median nerve

Answer 24

C6-T1

Question 25

Roots of radial nerve

Answer 25

C5-T1

Question 26

Roots of ulnar nerve

Answer 26

C8 and T1

Question 27

What is the axillary nerve responsible for?

Answer 27

Abduction from 15 to 90

Question 28

What is the deltoid innervated by?

Answer 28

Axillary nerve

Question 29

What innervates teres major

Answer 29

Lower subscapular nerve