Brachial Plexus

Question 1

What forms the roots of the brachial plexus?

Answer 1

The ventral rami of C5-T1

Question 2

Which nerve roots combine to form the upper trunk of the brachial plexus?

Answer 2

C5/6

Question 3

Which nerve roots combine to form the lower trunk of the brachial plexus?

Answer 3

C8 and T1

Question 4

Which nerve root forms the middle trunk of the brachial plexus?

Answer 4

C7

Question 5

Which divisions combine to form the lateral cord of the brachial plexus?

Answer 5

Anterior divisions of the upper and middle trunks

Question 6

Which divisions combine to form the posterior cord of the brachial plexus?

Answer 6

Posterior divisions of the upper, middle and lower trunks

Question 7

Which division forms the medial cord of the brachial plexus?

Answer 7

Anterior division of the lower trunk

Question 8

The cords of the brachial plexus are named with respect to their position around which structure?

Answer 8

Axillary artery

Question 9

Which nerves stem from the posterior cord of the brachial plexus?

Answer 9

Radial and axillary nerves

Question 10

Which nerves are the terminal branches of the lateral cord of the brachial plexus?

Answer 10

Musculocutaneous nerve and part of the median nerve

Question 11

Which nerves are the terminal branches of the medial cord of the brachial plexus?

Answer 11

Ulnar nerve and part of the median nerve

Question 12

Where do the trunks of the brachial plexus emerge?

Answer 12

Behind the scalenus anterior and in front of the scalenus medius

Question 13

Where do the six divisions of brachial plexus cross over?

Answer 13

Behindthe clavicle on the outer border of the first rib

Question 14

What part of the brachial plexus lies medial to the coracoid process?

Answer 14

Cords