Flashcards in CN IX Deck (51)
What is the name for CN IX?
Glossopharyngeal (Go to Vegas)
What kind of fibers are carried by CN IX?
motor, sensory, and autonomic fibers
What muscle does CN IX send motor fibers to?
What kind of info does CN IX carry from the pharynx?
sensory, including taste info from the posterior tongue
Where does CN IX send (ultimately) parasympathetic info?
Where are the cell bodies for motor fibers in CN IX?
Specifically, what kind of motor fibers are carried by CN IX?
Where do branchiomotor fibers develop from embryologically?
pharyngeal arches or branchial fibers NOT somites
What is the nucleus of origin for preganglionic parasympathetic fibers carried in CN IX?
Inferior Salivatory Nucleus
Where do afferent sensory fibers of CN IX terminate?
What other CN is associated with the solitary nucleus?
What two peripheral ganglia are associated with CN IX?
superior and inferior ganglion
T/F: the inferior ganglion is smaller and usually thought of as a separated part of the superior ganglion.
False; vice-versa (superior is smaller and thought to be a separated part of the inferior ganglion)
Where all is general sensory carried from in CN IX?
from nasopharynx, oropharynx, portion of the tongue posterior to sulcus terminalis, uvula, and palatine tonsils. (NO PT U PT or NOT U Please)
What cavity has general sensation carried in a branch of the glossopharyngeal nerve?
General sensation neurons carried in CN IX have cell bodies in which ganglion? Where do they synapse in the CNS?
inferior (Snell book says superior); spinal nucleus of the trigeminal
(this question is pending confirmation from Torgerud)
Taste info from posterior of the sulcus terminalis (posterior 1/3 of the tongue) is carried by neurons from which ganglion?Axons from these cells synapse where?
inferior ganglion; superior part of the solitary nucleus
Cells carrying visceral afferent info from the carotid sinus and carotid body synapse where?
in the lower part of the solitary nucleus
What nucleus contributes lower motor neurons to CN IX? What other cranial nerves does this nucleus contribute to?
nucleus ambiguus; also contributes to X and XI
What muscle(s) is/are innervated by CN IX?
What kind of fibers does the inferior salivatory nucleus give rise to in CN IX? Where do these fibers synapse?
preganglionic parasympathetic; otic ganglion
Postganglionic fibers arising fro the otic ganglion supply which structures?
parotid, buccal, and inferior labial glands
Where is the apparent origin of the glossopharyngeal nerve?
superior, lateral aspec of the MO
Where does CN IX exit the skull?
The jugular foramen has a septum which divides it into anterior and posterior compartments. Which compartment is the glossopharyngeal nerve found in?
T/F: the superior ganglion is located just beyond the jugular foramen, outside of the cranium.
False; this is true of the inferior ganglion but the superior ganglion is located within the cranium
Where does the tympanic nerve arise from?
the inferior ganglion
What kind of fibers are carried by the tympanic nerve?
preganglionic parasympathetic fibers and somatosensory fibers
What structure does the tympanic nerve travel through to get to the tympanic cavity?