Brachial Plexus

Question 1

Nerves that branch off the roots

Answer 1

Dorsal Scapular Nerve: C5

Long Thoracic Nerve: C5,6,7

Question 2

What roots form to make the trunks?

Answer 2

Upper: C5 and C6
Middle: C7
Lower: C8 and T1

Question 3

Branches off of the Upper Trunk

Answer 3

Nerve to subclavius
Suprascapular Nerve

Question 4

Divisions of Trunks that make up Cords

Answer 4

Lateral: anterior divisions of upper and middle trunks.
Medial: anterior division of lower trunk.
Posterior: posterior divisions of all trunks.

Question 5

Branches off of Lateral Cord

Answer 5

Lateral pectoral nerve
Musculocutaneous nerve
Lateral root of Median nerve

Question 6

Branches off of Posterior Cord

Answer 6

Upper, Middle (TD), and Lower Subscapular nerves
Axillary nerve
Radial nerve

Question 7

Branches off of Medial Cord

Answer 7

Medial pectoral nerve
Medial cutaneous nerves of arm and forearm.
Medial root of Median nerve
Ulnar nerve.

Question 8

Roots that contribute to terminal branches.

Answer 8

Radial: all roots.
Axillary: C5, C6
Musculocutaneous: C5, C6
Median: C6-T1
Ulnar: C8, T1