CN IX-XII

Question 1

the superior and inferior salivary nuclei contain what fibers?

Answer 1

preganglionic parasympathetic

Question 2

The nucleus ambiguous supplies what?

Answer 2

muscles of pharynx and larynx

Question 3

The dorsal nucleus of the vagus nerve contains what fibers?

Answer 3

preganglionic parasympathetic

Question 4

The hypoglossal nucleus supplies what?

Answer 4

tongue muscles

Question 5

One of the five functions of the glossopharyngeal nerve (CN IX) is somatic sensation (touch, pain, temp, etc.) from what areas?

Answer 5

posterior tongue, oropharynx and related areas

Question 6

One of the five functions of the glossopharyngeal nerve (CN IX) is taste sensation from where?

Answer 6

posterior tongue

Question 7

One of the five functions of the glossopharyngeal nerve (CN IX) is visceral sensation (baroreceptors and chemoreceptors) where?

Answer 7

in the carotid sinus and carotid bodies

Question 8

One of the five functions of the glossopharyngeal nerve (CN IX) is somatic motor innervation to one muscle. What muscle is this?

Answer 8

stylopharyngeous

Question 9

One of the five functions of the glossopharyngeal nerve (CN IX) is preganglionic parasympathetic innervation of the ____ gland

Answer 9

parotid

Question 10

The nerve to posterior wall of pharyngeal plexus and nerve to palatine tonsil are both motor or sensory?

Answer 10

sensory

Question 11

Taste and general sensation to the posterior tongue is supplied by both CN ___ and CN ___

Answer 11

IX; X

Question 12

The carotid branch from the glossopharyngeal nerve (CN IX) is visceral motor or visceral sensory?

Answer 12

visceral sensory

Question 13

The tympanic nerve carries what fibers?

Answer 13

preganglionic parasympathetic

Question 14

Independently testing the glossopharyngeal nerve is difficult. Why is this?

Answer 14

stimulating the oropharynx to elicit the gag reflex can provide false positive results as that area is also supplied by facial and/or the vagus nerves. Touch and taste to the posterior tongue can be assessed.

Question 15

One of the five functions of the vagus nerve is general somatic sensation where?

Answer 15

from the epiglottis, pharynx, larynx, upper esophagus and the airway and bronchial tree

Question 16

One of the five functions of the vagus nerve is supplying a small area for taste in the ____ and ____ _____

Answer 16

epiglottis and epiglottic valleculae

Question 17

One of the five functions of the vagus nerve is widespread sensory input from the thoracic and abdominal viscera concerning the functional status of what?

Answer 17

cardiovascular, pulmonary, GI and renal systems

Question 18

One of the five functions of the vagus nerve is somatic motor innervation of what?

Answer 18

palatoglossus, intrinsic muscles of the larynx, and skeletal muscles of the upper esophagus

Question 19

One of the five functions of the vagus nerve is preganglionic parasympathetic innervation to what?

Answer 19

thoracic and abdominal organs to the level of the descending colon

Question 20

CN X (vagus) innervates most muscles of the soft palate; palatoglossus; and all the muscles of the pharynx except ____

Answer 20

stylopharyngeus

Question 21

CN X (vagus) supplies what 3 types of innervation to the airway

Answer 21

general somatic, general visceral, preganglionic parasympathetic

Question 22

The vagus nerve is difficult to assess directly. However, dysfunction in one vagus nerve typically will be manifested as a what?

Answer 22

a low, weak voice and/or difficulty swallowing due to unilateral paralysis or pharyngeal and laryngeal muscles

Question 23

Asymmetry in the soft palate may indicate ___ dysfunction

Answer 23

vagal

Question 24

CN XI (accessory) innervates what two muscles?

Answer 24

scm and trapezius

Question 25

CN XII (hypoglossal) innervates all the muscles of the tongue except _____

Answer 25

palatoglossus

Question 26

How would one assess the hypoglossal nerve?

Answer 26

asking patient to protrude the tongue - should protrude midline

Question 27

cortical input to the hypoglossal is principally only from where?

Answer 27

contralateral motor cortex

Question 28

Corticonuclear lesions produce deviation of the palate to the side of the lesion and deviation of the protruded tongue to the ____ side

Answer 28

opposite