Nerves of the Upper Limb

Question 1

dorsal root

Answer 1

afferent (sensory) fibers going towards CNS

Question 2

ventral root

Answer 2

efferent (motor) fibers going away from the CNS

Question 3

spinal nerve

Answer 3

union of dorsal and ventral root, mixed nerve

Question 4

dorsal ramus

Answer 4

nerves moving towards CNS

Question 5

ventral ramus

Answer 5

nerves leaving CNS

Question 6

number of cervical spinal nerves

Answer 6

8

Question 7

number of thoracic spinal nerves

Answer 7

12

Question 8

number of lumbar spinal nerves

Answer 8

5

Question 9

number of sacral spinal nerves

Answer 9

5

Question 10

number of coccygeal spinal nerves

Answer 10

1

Question 11

brachial plexus

Answer 11

C5-T1

Question 12

musculocutaneous n

Answer 12

C5-7
all muscles of the anterior arm

Question 13

median n

Answer 13

C5-T1
most anterior forearm and 5 intrinsic hand muscles

Question 14

ulnar n

Answer 14

C8-T1
some muscles of anterior forearm and all but 5 intrinsic hand muscles

Question 15

radial n

Answer 15

C5-T1
all posterior arm and forearm

Question 16

axillary n

Answer 16

C5+6
deltoid and teres minor

Question 17

long thoracic n

Answer 17

C5-7
serratus anterior

Question 18

thoracodorsal n

Answer 18

C6-8
latissmus dorsi