Posterior Triangle Nerves

Question 1

Posterior triangle nerve

Answer 1

Spinal accessory nerve (CN XI)

Question 2

Spinal accessory nerve innervates which muscles?

Answer 2

• SCM
• Traps

Question 3

The spinal accessory nerve exits which foramen?

Answer 3

Jugular

Question 4

After exiting the jugular foramen, the spinal accessory nerve briefly descends into what?

Hint: not chaos

Answer 4

Carotid sheath

Question 5

What blood vessel does the spinal accessory nerve cross?

Answer 5

Internal jugular vein (lateral surface)

Question 6

The spinal accessory nerve emerges deep to this muscle

Answer 6

SCM

Question 7

The spinal accessory nerve enters the posterior triangle at which part of the SCM?

Answer 7

Posterior border

Question 8

Just inferior to CN XI, most of the cutaneus nerves that supply the neck emerges deep to at a single point called?

Answer 8

Erb’s point

Question 9

Cutaneus nerves of Erb’s point are motor or sensory?

Answer 9

Sensory

Question 10

Sensory nerve roots

Answer 10

C2-C4

Question 11

Lesser occipital nerve

Answer 11

C2

Question 12

Great auricular nerve

Answer 12

C2, C3

Question 13

Transverse cervical nerve

Answer 13

C2, C3

Question 14

Supraclavicular nerve

Answer 14

C3, C4

Question 16

Nerve roots of the cervical plexus

Answer 16

C1-C5

Question 17

Lesser occipital nerve root

Answer 17

C2

Question 18

Greater auricular nerve root

Answer 18

C2,C3

Question 19

Transverse cervical nerve root

Answer 19

C2, C3

Question 20

Supraclavicular nerve root

Answer 20

C3,C4