Upper Limb Innervation

Question 1

Origin of Brachial Plexus

Answer 1

C5- T1

Question 2

Breakdown of Brachial Plexus

Answer 2

Roots, Trunks, Divisions, Cords, Branches

Question 3

Upper Root Origin

Answer 3

C5 and C6

Question 4

Middle Root Origin

Answer 4

C7

Question 5

Lower Root Origin

Answer 5

C8 and T1

Question 6

Musculocutaneous Nerve

Answer 6

C5, 6, 7
inn anterior (flexing) part of arm
inn skin on lateral side of forearm

Question 7

Median Nerve

Answer 7

C5- T1
inn all but 1 1/2 mm of flexor/ ant part of forearm
inn thenar mm in hand

Question 8

Carpal Tunnel Syndrome

Answer 8

compression of median nerve

Question 9

Ulnar Nerve

Answer 9

C7- T1
inn 1 1/2 flexor mm of forearm
inn all of hand mm except thumb

Question 10

Radial Nerve

Answer 10

C5- T1
inn extensor/ post part of arm
inn all mm of extensor part of forearm

Question 11

Axillary Nerve

Answer 11

C5, C6

inn deltoid and teres minor