CN XI (Accessory)

Question 1

CN XI is what type of N?

Answer 1

Motor

Question 2

CN XI has what two parts

Answer 2

Cranial

Spinal

Question 3

The crainal part of CN XI is from where?

Answer 3

Nucleus ambiguus

Question 4

THe spinal part of CN XI is from where?

Answer 4

Spinal Nuclei in C1-C5 spinal cord segments

Question 5

The cranial part contains what type of fibers?

Answer 5

Special visceral efferent

Question 6

Special visceral efferent fibers in the cranial part of CN XI emerge from what?

Answer 6

Medulla as rootlets posterior to olive

Question 7

The rootlets unite to form what?

Answer 7

Single nerve which is joined by spinal part before passing through jugular foramen

Question 8

On leaving the skull, the cranial part leaves the N and joins the Vagus N to supply what?

Answer 8

Muscles of palate
Pharynx
Larynx

Question 9

The spinal part of CN XI has what type of fibers?

Answer 9

General Somatic efferent

Question 10

GSE fibers arise from rootlets from where?

Answer 10

Upper 5 cervical segments of spinal cord

Question 11

The rootlets join together and pass upwards through what?

Answer 11

Foramen Magnum to join with cranial part of cranial N

Question 12

On exiting the skull the spinal part pierces and supplies what muscle?

Answer 12

SCM

Question 13

the spinal part then passes backwards through what?

Answer 13

Posterior cervical triangle

Question 14

The spinal part of CN XI ends up by piercing and supplying what?

Answer 14

Trapezius Muscle