CN IX-XII Flashcards
the superior and inferior salivary nuclei contain what fibers?
preganglionic parasympathetic
The nucleus ambiguous supplies what?
muscles of pharynx and larynx
The dorsal nucleus of the vagus nerve contains what fibers?
preganglionic parasympathetic
The hypoglossal nucleus supplies what?
tongue muscles
One of the five functions of the glossopharyngeal nerve (CN IX) is somatic sensation (touch, pain, temp, etc.) from what areas?
posterior tongue, oropharynx and related areas
One of the five functions of the glossopharyngeal nerve (CN IX) is taste sensation from where?
posterior tongue
One of the five functions of the glossopharyngeal nerve (CN IX) is visceral sensation (baroreceptors and chemoreceptors) where?
in the carotid sinus and carotid bodies
One of the five functions of the glossopharyngeal nerve (CN IX) is somatic motor innervation to one muscle. What muscle is this?
stylopharyngeous
One of the five functions of the glossopharyngeal nerve (CN IX) is preganglionic parasympathetic innervation of the ____ gland
parotid
The nerve to posterior wall of pharyngeal plexus and nerve to palatine tonsil are both motor or sensory?
sensory
Taste and general sensation to the posterior tongue is supplied by both CN ___ and CN ___
IX; X
The carotid branch from the glossopharyngeal nerve (CN IX) is visceral motor or visceral sensory?
visceral sensory
The tympanic nerve carries what fibers?
preganglionic parasympathetic
Independently testing the glossopharyngeal nerve is difficult. Why is this?
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.
One of the five functions of the vagus nerve is general somatic sensation where?
from the epiglottis, pharynx, larynx, upper esophagus and the airway and bronchial tree
One of the five functions of the vagus nerve is supplying a small area for taste in the ____ and ____ _____
epiglottis and epiglottic valleculae
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?
cardiovascular, pulmonary, GI and renal systems
One of the five functions of the vagus nerve is somatic motor innervation of what?
palatoglossus, intrinsic muscles of the larynx, and skeletal muscles of the upper esophagus
One of the five functions of the vagus nerve is preganglionic parasympathetic innervation to what?
thoracic and abdominal organs to the level of the descending colon
CN X (vagus) innervates most muscles of the soft palate; palatoglossus; and all the muscles of the pharynx except ____
stylopharyngeus
CN X (vagus) supplies what 3 types of innervation to the airway
general somatic, general visceral, preganglionic parasympathetic
The vagus nerve is difficult to assess directly. However, dysfunction in one vagus nerve typically will be manifested as a what?
a low, weak voice and/or difficulty swallowing due to unilateral paralysis or pharyngeal and laryngeal muscles
Asymmetry in the soft palate may indicate ___ dysfunction
vagal
CN XI (accessory) innervates what two muscles?
scm and trapezius
CN XII (hypoglossal) innervates all the muscles of the tongue except _____
palatoglossus
How would one assess the hypoglossal nerve?
asking patient to protrude the tongue - should protrude midline
cortical input to the hypoglossal is principally only from where?
contralateral motor cortex
Corticonuclear lesions produce deviation of the palate to the side of the lesion and deviation of the protruded tongue to the ____ side
opposite
