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Flashcards in CN X Part 2 Deck (46)
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1

What kind of fibers are carried by the branches to the carotid?

viscerosensory fibers

2

Where do the branches to the carotid carry info to and from?

from chemoreceptors in the carotid body to the inferior part of the nucleus for the solitary tract

3

Where is the superior laryngeal nerve given off?

just inferior to the inferior ganglion

4

What does the superior laryngeal nerve divide into?

internal and external laryngeal nerves

5

What kind of info is carried by the external laryngeal nerve and where?

motor info to the cricothyroid

6

What kind of info is carried by the internal laryngeal nerve and where?

sensory info from the laryngeal mucosa as far inferior as the vocal cords

7

Where is somatosensory info carried by the Vagus?

spinal nucleus of trigeminal

8

Where is viscerosensory info carried by the Vagus?

solitary nucleus

9

What nerve carries sensory info from below the vocal folds?

recurrent laryngeal

10

What muscle of the larynx does the recurrent laryngeal NOT supply?

cricothyroid (external laryngeal got this one)

11

What muscles ARE supplied by the recurrent laryngeal nerve and what are their actions?

thyroarytenoid (shortens vocal cords by pulling arytenoid cartilages forward)
posterior cricoarytenoid (opens rima glottis)
lateral cricoarytenoid (closes rima glottis)
arytehnoid muscles (closes the rima glottis)

12

Other than motor info, what else is carried by the recurrent laryngeal nerve?

sensory info from the larynx inferior to the vocal cords

13

T/F: the recurrent laryngeal nerve follow the same path on both side.

False

14

which side of the recurrent laryngeal nerve is longer?

left side

15

Where does the recurrent laryngeal nerve come off of the vagus on the left side?

after the vagus passes in front of the aortic arch

16

After the recurrent laryngeal nerve comes off of the vagus nerve on the left side, where does it go?

passes under the aortic arch and ascends

17

What does the recurrent laryngeal nerve eventually become and what does it supply?

inferior laryngeal nerve which supplies the laryngeal musculature

18

What major vessel does the recurrent laryngeal nerve pass posterior to on the left?

aorta, specifically the aortic arch

19

What major vessel on the right does the recurrent laryngeal nerve pass posteriorly under before ascending similarly to the left?

subclavian artery

20

Does the vagus descend anterior or posterior to the aorta and subclavian arteries?

anterior

21

How many parasym contributers does the vagus supply to the cardiac plexus? sympathetic contributors/

2 parasym, 3 sym

22

What kind of info is carried by the superior and inferior cervical cardiac branches to the cardiac plexus?

parasym

23

What do the superior branches of the vagus nerve travel with to get to the cardiac plexus?

great vessels

24

What gives off the inferior cervical cardiac branches and where do they travel?

recurrent laryngeal nerve; cardiac plexus

25

One branch of the cervical cardiac branches carries viscerosensory info concerning the wall of the aorta. When is this nerve stimulated?

When aortic pressure is too high

26

What is the cardiac paradox?

sympathetic supply dilates coronary arteries and parasympathetic constricts coronary arteries; Baroreceptors (parasym) cause vasodilation except in coronary arteries.

27

Once the vagus nerve enters the thorax, what structure does it pass behind?

the root of the ipsilateral lung

28

What plexus does the vagus nerve contribute to once it enters the thorax?

pulmonary plexus

29

After contributing to the pulmonary plexus, what plexus does the vagus travel to and how does it get there?

the right vagus passes posteriorly and the left vagus passes anteriorly over the esophagus contributing to the esophageal plexus

30

Which u\pulmonary plexus is larger?

posterior