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PNS. > Vagus > Flashcards

Vagus Flashcards

1
Q

X carries ___ fibers

A

motor, parasymp, and sensory (including taste)

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2
Q

What is a major characteristic about X

A

longest cn

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3
Q

X is the most important __________ n.

A

parasymp

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4
Q

Cell bodies for motor nerves are located where

A

Nucleus Ambiguus

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5
Q

Nucleus Ambiguus receives sensory info from which hemisphere

A

both

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6
Q

Where do preganglionic paras fibers arise

A

Posterior nucleus of vagus

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7
Q

Where do pre para fibers indirectly receive info from

A

hypothalamus and carotid sinus

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8
Q

What tract do taste and visceroscensory info terminate

A

nucleus of solitary tract

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9
Q

What ganglia are associated with vagus

A

Superior and inferior ganglia

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10
Q

Superior ganglion aka

A

jugular ganglion

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11
Q

inferior ganglion aka

A

nodoes ganglion

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12
Q

Somatic sensory info cell bodies located for X

A

superior ganglion

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13
Q

What is X responsible for somatosensory

A

dura, auricle, external auditory canal, lateral tympanic membrane and muscosa of oropharynx and laryngopharynx

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14
Q

Where does somatosensory info from X terminate

A

spinal nucleus of trigeminal

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15
Q

Taste from cn X is carried to_________

A

superior part of nucleus solitary tract

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16
Q

where are the neurons for taste in cn X located?

A

inferior ganglion

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17
Q

Where does X carry visceral sensory info from?

A

larynx and laryngopharynx, viscera in hte thoracic and abdominal cavities, pressure receptors in the aortic arch and chemoreceptors in the para-aortic body

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18
Q

Apparent origin of X? as?

A

lateral aspect of MO as rootlets

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19
Q

Rootlets become trunk for X before X exits….

A

jugular foramen

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20
Q

What branch of X supplies dura of posterior cranial fossa

A

meningeal branch

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21
Q

what two nerves pass jugular foramen?

A

XI and X

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22
Q

where does X pass through jugular foramen

A

anterior to septum

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23
Q

What are X and XI surrounded by

A

meningeal sheath (arachnoid and dura)

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24
Q

Which ganglion is located in jugular foramen

A

superior

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25
Q

Which ganglion is largern superior or inferior

A

inferior

26
Q

Where is inferior ganglion located

A

just inferior to jugular formamen

27
Q

What branch is given off at superior ganglion

A

auricular branch

28
Q

explain course of auricular branch of X

A
  • mastoid canaliculus
  • tympanomastoid fissure
  • external auditory meatus
29
Q

What does auricular branch carry/supply

A

sensory, from meatus and small portion of auricle

30
Q

Where does vagus sit above carotid bifurcation

A

BETWEEN internal carotid and internal jugular in carotid sheath

31
Q

where does X sit below carotid bifurcation

A

internal jugular and common carotid

32
Q

what are the branch of X in the neck

A
  • pharyngeal
  • branches to the carotid
  • superior laryngeal
  • recurrent laryngeal
  • superior and inferior cervical cardiac branches
33
Q

Where does pharyngeal branch of X leave X

A

@ level of inferior ganglion

34
Q

What will combine with pharyngeal of X

A

IX and sympathetic fibers from sympathetic trunk

35
Q

What do IX and Sympathetic fibers from sympathetic trunk form

A

pharyngeal plexus

36
Q

What doespharyngeal of X supply motor to

A

pharyngeal constrictor and levator veli palatine (soft palate)

37
Q

Which ganglion are branches to the carotid given off

A

inferior

38
Q

What does the branches to the carotid carry? where relay info?

A

viscerosensory fibers that relay info from chemorecptors in carotid body to inf. part of nucleus for solitary tract

39
Q

Branches of superior laryngeal n of X

A

internal and external laryngeal nerve

40
Q

External Laryngeal of X supplies…

A

motor to cricothyroid

41
Q

Internal laryngeal of X supplies

A

sensory from laryngeal mucosa to vocal folds

42
Q

What two nerves are seperated by vocal folds for sensory innervation

A
  • internal laryngeal of superior laryngeal of x

- recurrent laryngeal of x

43
Q

Whta does recurrent laryngeal supply

A
  • motor to all muscles of laynx except cricothryoid

- sensory info to larynx below vocal folds

44
Q

Which n of X loops in from of aortic arch

A

left recurrent laryngeal

45
Q

What does left recurrent laryngeal become

A

inferior laryngeal nerve

46
Q

what does recurrent laryngeal of x supply

A

laryngeal musculature

47
Q

what n of X passes post to subclavian arter

A

rt recurrent laryngeal

48
Q

What kind of info do sup and inf cervical cardiac branches carry to cardiac plexus?

A

parasymp

49
Q

How many para branch contribute to cardiac plexus? symp branches?

A

2, 3

50
Q

Superior branches leave vagus and travel with __________ to cardiac plexus

A

great vessels

51
Q

what branches are given off recurrent laryngeal and go to cardiac plexus

A

inferior branches

52
Q

The branch that carries viscerosensory info concerning pressure will be stimulated if…

A

aortic pressure becomes too high

53
Q

As X enters thorax it passes_______ to contribute to what plexus

A

posterior to root of ipsilat lung, pulmonary

54
Q

Where do rt vs lt vagus pass esophogus ? plexus?

A

lt- ant
rt- posterior
esophogeal

55
Q

RT or LT become posterior vagal trunk

A

rt

56
Q

postior vagal trunk sends branches to? terminates? which goes to

A

post. stomach, large celiac branch -> duodenum, liver, kidnes, small intestine, and prox 2/3 large intestine

57
Q

Vagal supply reaches duodenum, liver, kidnes, small intestine, and prox 2/3 large intestine through? (3 plexuses)

A
  • celiac
  • superior mesenteric
  • renal
58
Q

What nerve comes anterior vagal trunk?

A

left vagus

59
Q

Where does left X become ant vagal trunk

A

before esophageal opening

60
Q

where does rt X become post vagal trunk

A

after esophagel opening

61
Q

Where does anterior vagal trunk send branches

A

stomach, liver, pancrea, and sup part of duodenum

PNS. (2 decks)

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