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Flashcards in Exam 2 CN X Deck (56)
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1

Is vagus a motor or sensory nerve?

It is mixed!

2

What type of fibers does the vagus nerve carry

Motor, parasympathetic, and sensory information

3

Where does the vagus carry some taste information from

The epiglottal region

4

What 2 things make the vagus nerve so special

- it is the longest cranial nerve
- it is the most important parasympathetic nerve

5

Where are the motor fibers cell bodies that are carried in the vagus

In the nucleus ambiguus

6

Where does the nucleus ambiguus receive information from

Both cerebral hemispheres

7

Where do preganglionic parasympathetic fibers arise from in the vagus

The posterior (dorsal) nucleus of the vagus

8

Where do the preganglionic parasympathetic fibers receive info from?

Indirectly from hypothalamus and carotid sinus

9

What terminates in the spinal nucleus of CN V when talking about the vagus

Somatic sensory

10

What information terminates in the nucleus of the solitary tract

Taste and viscerosensory

11

What two peripheral ganglia are associated with the vagus nerve and what are their alternate names?

Superior (jugular) and inferior (nodose) ganglions . Not the same as in CN IX

12

Where are the cell bodies located for neurons carrying somatic sensory information

Superior ganglion or jugular ganglion

13

How is taste from the epiglottis carried in vagus

Carried to the superior portion of nucleus of the solitary tract by neurons located in the inferior ganglion

14

How is visceral sensory information carried in the vagus

It is carried to the inferior part of the nucleus for the solitary tract by neurons located in the inferior ganglion

15

Where does the vagus nerve carry visceral sensory information from?

Larynx, laryngopharynx, viscera in thoracic/abdominal cavities, pressure receptors in aortic arch, chemoreceptors in para-aortic body

16

Where does the vagus nerve emerge from as a series of rootlets

The lateral aspect of medulla oblongata (A.O.)

17

What branch of vagus supplies the infratentorial dura (posterior cranial fossa)?

Meningeal branch

18

How does the vagus exit the skull?

Through the jugular foramen

19

How is the jugular foramen compartmentalized

By a fibrous septum. C.N. X and XI travel anterior to the septum. C.N. IX travels posterior to the septum

20

What two CN share a meningeal sheath (arachnoid and dura)

CN X and XI

21

Which ganglion is located in the jugular foramen

The superior ganglion

22

Where is the inferior ganglion located

Just inferior to jugular foramen

23

What branch carries sensory information from the meatus and small portion of the auricle

The auricular branch

24

What is the course of the auricular branch

Through mastoid canaliculus and tympanomastoid fissure to reach external auditory meatus

25

After exiting the jugular foramen and moving inferiorly what does the vagus nerve travel within

Carotid sheath

26

Where is the carotid sheath located

Between internal carotid artery and internal jugular vein

27

Where does the vagus nerve travel after the carotid sheath

Between the internal jugular vein and common carotid artery inferior to carotid bifurcation

28

Where does the pharyngeal branch leave the vagus nerve

At the level of the inferior ganglion

29

What fibers does the pharyngeal branch combine with after leaving inferior ganglion

Combine with fibers from glossopharyngeal nerve and sympathetic fibers from sympathetic trunk

30

What does the pharyngeal branch of vagus make when it joins fibers from the glossopharyngeal nerve and sympathetic fibers

The pharyngeal plexus