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PNS Quizzes > Quiz 3: Glossopharyngeal & Vagus N. > Flashcards

Quiz 3: Glossopharyngeal & Vagus N. Flashcards

1
Q

What types of information is carried in the glossopharyngeal nerve?

A

Motor, General Sensory, Parasympathetic Visceral Sensory and Special Sensory

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2
Q

T/F: C.N. IX is classified as a mixed cranial nerve.

A

True

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3
Q

Where does C.N. IX (glossopharyngeal) carry motor innervation?

A

Stylopharyngeus Muscle

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4
Q

Where does C.N. IX carry sensory information from?

A

Nasopharynx, oropharynx and taste information from the tongue posterior to the sulcus terminalis, uvula, and palatine tonsils. General sensation is also carried from the tympanic cavity.

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5
Q

Where does C.N. IX carry parasympathetic info to?

A

The parotid, buccal & inferior labial glands

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6
Q

The motor fibers carried in the glossopharyngeal nerve arise from cell bodies located in the ___________ part of the _________ ___________.

A

Superior, Nucleus Ambiguus

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7
Q

Nucleus of origin fibers carried to the nucleus ambiguus are carried in which cranial nerves?

A

IX, X and XI

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8
Q

The motor fibers carried in the glossopharyngeal nerve are catergorized as ____________ instead of somatic motor.

A

Branchiomotor (speaks to embryology of target)

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9
Q

Preganglionic parasympathetic fibers of CN IX arise from the ______ ________ nucleus.

A

Inferior Salivary

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10
Q

Afferent, sensory fibers of CN IX terminate in the __________ nucleus.

A

Solitary (Recall CN VII)

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11
Q

There are how many peripheral ganglia associated with the glossopharyngeal nerve?

A

2

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12
Q

What are the two peripheral ganglia associated with the glossopharyngeal nerve?

A

Superior ganglion and Inferior ganglion

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13
Q

Is the inferior ganglion or superior ganglion smaller?

A

Superior ganglion

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14
Q

T/F: The superior ganglion and inferior ganglion are usually thought of as two non-related individual nuclei.

A

False, the superior ganglion is usually thought of as a separated part of the inferior ganglion.

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15
Q

Where do parasympathetic fibers of CN IX synapse?

A

Otic ganglion

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16
Q

Where do general sensory neurons have their cell bodies in CN IX?

A

Inferior ganglion

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17
Q

From the inferior ganglion, sensory fibers signal are conveyed to CNS and fibers synapse in __________________________.

A

Spinal nucleus of the Trigeminal Nerve

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18
Q

Taste information from the tongue posterior to the sulcus terminalis is carried in neurons from the _________ _______.

A

Inferior ganglion

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19
Q

Axons from special sensory cells (taste) synapse in the ________ part of the __________ nucleus after leaving the inferior ganglion (where cell bodies are located).

A

Superior; solitary

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20
Q

Some incoming fibers from the _________ ganglion synapse in the lower part of the solitary nucleus. These cells carry _______ ________ information from the carotid sinus and carotid body.

A

Inferior; visceral afferent

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21
Q

The _________ ________ contributes lower motor neurons to three cranial nerves (IX, X, XI).

A

Nucleus ambiguus

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22
Q

Axons from lower motor neurons carried in C.N. ____ will innervate the stylopharyngeus muscle.

A

IX

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23
Q

The inferior salivary nucleus gives rise to __________ ___________ axons carried in the glossopharyngeal nerve.

A

Preganglionic parasympathetic

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24
Q

Preganglionic parasympathetic axons carried in CN IX synapse in the ________ ganglion.

A

Otic

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25
Q

From the otic ganglion, postganglionic fibers supply what?

A

Parotid, buccal and inferior labial glands

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26
Q

What is the apparent origin of the glossopharyngeal nerve?

A

Lateral aspect of Superior M.O.

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27
Q

Where does CN IX exit the skull?

A

Jugular Foramen

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28
Q

Where is the superior ganglion (of CN IX) located?

A

Inside the cranium

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29
Q

Where is the inferior ganglion (aka Petrosal ganglion) (of CN IX) located?

A

Beyond jugular foramen, outside the cranium

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30
Q

What do the fibers exiting the M.O. at the apparent origin of the glossopharyngeal nerve look like?

A

Rootlets present (rather than 1 large trunk).

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31
Q

The tympanic nerve arises from the _________ ganglion.

A

Inferior

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32
Q

The tympanic nerve carries ___________ __________ fibers as well as ___________ fibers.

A

Preganglionic parasympathetic, Sensory

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33
Q

Fibers carried by the tympanic nerve travel through the __________ __________ into the tympanic cavity.

A

Tympanic canaliculus

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34
Q

In the tympanic cavity, the tympanic nerve receives __________ __________ fibers from the superior cervical ganglion, forming the __________ _________.

A

Postganglionic sympathetic; tympanic plexus.

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35
Q

The tympanic plexus carries somatosensory information from where?

A

Tympanic cavity, pharyngotympanic tube, and mastoid air cells.

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36
Q

The preganglionic parasympathetic fibers pass through the tympanic plexus and reform as the ________ ________ nerve.

A

Lesser Petrosal

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37
Q

Where does the lesser petrosal nerve synapse?

A

Otic ganglion

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38
Q

Postganglionic parasympathetic fibers are carried from the otic ganglion in branches of CN ___ to the parotid, buccal and inferior labial glands.

A

V3

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39
Q

The carotid branch ascends from below and enters the nerve at the _________ ganglion.

A

Inferior

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40
Q

The carotid branch carries afferent information from ___________ in the carotid body and ___________ in the carotid sinus.

A

Chemoreceptors, Baroreceptors

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41
Q

Similar information to the carotid body and sinus carried in CN IX may be carried in CN _____.

A

X (Vagus), Redundancy.

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42
Q

Pharyngeal branches of CN IX convey sensory information from where?

A

Mucosa of the pharynx.

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43
Q

Pharyngeal branches (IX) will combine with some vagal branches to form the _______ ______ (near the ________ _______ ________.)

A

Pharyngeal plexus; middle pharyngeal plexus

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44
Q

The muscular branch leaves the glossopharyngeal nerve to supply the ___________ muscle.

A

Stylopharyngeus

45
Q

Where do the remaining (terminal branches) of general sensory information in CN IX reach?

A

The oral cavity

46
Q

Tonsillar branches of CN IX convey sensory information from where?

A

Palatine tonsils and oral mucosa

47
Q

Lingual branches of CN IX carry general sensory and taste information from where?

A

The tongue, posterior to the sulcus terminalis

48
Q

T/F: The vagus nerve is a mixed cranial nerve.

A

True, it carries motor, parasympathetic and sensory information including taste information from epiglottis.

49
Q

What is the longest cranial nerve?

A

Vagus

50
Q

What is the most important parasympathetic nerve?

A

Vagus

51
Q

Motor fibers carried in the vagus nerve have cell bodies located in the _________ __________.

A

Nucleus ambiguus

52
Q

T/F: The nucleus ambiguus receives information from both cerebral hemispheres?

A

True

53
Q

Preganglionic parasympathetic fibers arise from the ________ ________ of the vagus.

A

Posterior (dorsal) nucleus

54
Q

The dorsal nucleus of the vagus receives information indirectly from the ____________ and the ________ _____.

A

Hypothalamus, Carotid Sinus

55
Q

Incoming somatic sensory information of vagus nerve terminates in the ________ ________ of CN V.

A

Spinal Nucleus

56
Q

Taste and viscerosensory information of the Vagus N. terminates where?

A

Nucleus of the solitary tract

57
Q

How many peripheral ganglia are associated with the vagus nerve?

A

2

58
Q

Which peripheral ganglia are associated with the vagus nerve?

A

Superior and Inferior ganglia (Not the same superior and inferior ganglia previously discussed for CN IX)

59
Q

What is another name for the superior ganglion?

A

Jugular Ganglion

60
Q

What is another name for the inferior ganglion?

A

Nodose Ganglion

61
Q

Somatic sensory information carried in neurons of the vagus nerve have cell bodies located in the ________ ________.

A

Superior Ganglion

62
Q

Sensory information is carried from where in the vagus nerve?

A

dura (infratentorial/posterior fossa), auricle, external auditory canal, lateral tympanic membrane, and mucosa of the oropharynx and laryngopharynx.

63
Q

Where is sensory information carried to (and synapses) in the vagus nerve?

A

Spinal nucleus of the trigeminal nerve (CN V)

64
Q

Taste from the epiglottis is carried where?

A

Superior part of the solitary nucleus

65
Q

Neurons located where carry taste info from the epiglottis to the solitary nucleus in CN X?

A

Inferior ganglion

66
Q

Visceral sensory information in the vagus nerve is carried where?

A

Inferior part of the solitary nucleus

67
Q

Neurons located where carry visceral sensory info to the solitary nucleus in CN X?

A

Inferior ganglion

68
Q

The vagus nerve carries visceral sensory information from where?

A

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

69
Q

The vagus nerve emerges from where?

A

Lateral aspect of M.O.

70
Q

What is the appearance of the vagus nerve where is exits the M.O.?

A

Series of rootlets

71
Q

The rootlets of the M.O. combine to form a trunk that gives off one branch before it exits the skull through the _______ ________.

A

Jugular foramen

72
Q

A meningeal branch of the vagus nerve supplies what?

A

Dura of the posterior cranial fossa

73
Q

The jugular foramen is compartmentalized by what?

A

A fibrous septum

74
Q

The vagus nerve along with the ________ ______ travel anterior to the septum of the jugular foramen.

A

Accessory Nerve

75
Q

The _________ nerve travels posterior to the septum.

A

Glossopharyngeal

76
Q

The vagus and accessory nerves also share what?

A

A meningeal sheath (arachnoid and dura)

77
Q

The superior ganglion is located where?

A

Jugular foramen

78
Q

The inferior ganglion (cylindrically shaped) is located where?

A

Inferior to the jugular foramen

79
Q

The auricular branch is given off where?

A

Superior ganglion

80
Q

The auricular branch courses through what two locations to to reach the external auditory meatus?

A

Mastoid canaliculus & tympanomastoid fissure

81
Q

The auricular branch carries sensory information for where?

A

External auditory meatus and a small portion of the auricle.

82
Q

Upon exiting the jugular foramen, the vagus nerve travels inferiorly within the _______ ________.

A

Carotid sheath

83
Q

When the vagus nerve travels within the carotid sheath it travels along with what two structures?

A

Internal carotid artery and Internal jugular vein

84
Q

T/F: The vagus nerve travels between the jugular vein and common carotid artery inferior to the carotid bifurcation.

A

True

85
Q

What are the main branches of the vagus nerve given off in the neck?

A

Pharyngeal branch, Branches to the carotid artery, Superior laryngeal nerve, recurrent laryngeal nerve and the superior & inferior cardiac branches

86
Q

The pharyngeal branch of the vagus nerve leaves the nerve at the level of the _______ __________.

A

Inferior ganglion

87
Q

The pharyngeal branch of the vagus nerve will combine with what?

A

Fibers from the glossopharyngeal nerve and with sympathetic fibers from the sympathetic trunk

88
Q

What is formed when the pharyngeal branch (CN X) combines with glossopharyngeal fibers and sympathetic trunk fibers?

A

Pharyngeal plexus

89
Q

Vagal fibers will provide motor supply to what?

A

Pharyngeal constrictor muscles and the levator veli palatine muscle of the soft palate

90
Q

Branches to the carotid artery (of CN X) are also given off what?

A

Inferior ganglion

91
Q

Branches to the carotid artery carry viscerosensory fibers that relay info from what?

A

Chemoreceptors in the carotid body to the inferior part of the solitary nucleus

92
Q

The superior laryngeal nerve is given off just inferior to what?

A

Inferior ganglion

93
Q

What does the superior laryngeal nerve divide into?

A

Internal and External Laryngeal Nerves

94
Q

The external laryngeal nerve supplies what?

A

Motor supply to the cricothyroid muscle.

95
Q

The internal laryngeal nerve carries sensory information from where?

A

Laryngeal mucosa as far inferior as the vocal folds

96
Q

Where does the internal laryngeal nerve terminate?

A

Spinal nucleus of CN V

97
Q

The recurrent laryngeal nerve supplies what?

A

Motor fibers to all muscles of the larynx except the cricothyroid. (Thyroarytenoid, Posterior cricoarytenoid, Lateral cricoarytenoid & arytenoid muscles)

98
Q

The recurrent laryngeal nerve carries sensory information from where?

A

The larynx inferior to the vocal folds.

99
Q

T/F: The recurrent laryngeal nerve follows the same path on each side.

A

False

100
Q

On the left side the recurrent laryngeal nerve follows what path?

A

It comes off the vagus after the vagus passes in front of the aortic arch. It then passes under the aortic arch and ascends eventually becoming the inferior laryngeal nerve.

101
Q

What does the inferior laryngeal nerve supply?

A

Laryngeal musculature

102
Q

On the right side the recurrent laryngeal nerve follows what path?

A

It passes posteriorly under the subclavian artery before ascending.

103
Q

T/F: The right and left recurrent laryngeal nerves supply the same thing.

A

True

104
Q

The superior and inferior cardiac branches carry __________ information to the cardiac plexus.

A

Parasympathetic

105
Q

The superior branches of the cardiac branches leave the vagus nerve and travel with what to the cardiac plexus?

A

The great vessels

106
Q

The inferior branches of the cardiac branches are given off by what?

A

Recurrent laryngeal nerves

107
Q

Where do the inferior branches of the cardiac branches travel to?

A

Cardiac Plexus

108
Q

One branch of the cardiac branches will carry ___________ information concerning pressure of the wall of the aorta.

A

Viscerosensory

109
Q

T/F: The viscerosensory branch of the cardiac branches is stimulated when aortic pressure becomes too low.

A

False, when aortic pressure becomes too high.

PNS Quizzes (7 decks)

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