Exam 2- CN 9 Flashcards
Glossopharyngeal carries what kind of fibers
Motor, sensory, and autonomic fibers
Glossohpharyngeal is a __________ cranial nerve
Mixed
CN9 gives motor innervation to
Stylopharyngeus
CN 9 gives sensory info from
The pharynx, including taste info from the posterior tongue
CN 9 gives parasympathetic info leading to the
Parotid and other glands
Motor fibers for CN9 arise from cell bodies located in
Superior part of nucleus ambiguus
Aka brachiomotor vs. somatomotor
Preganglionic parasympathetic fibers for CN 9 arise
From the inferior salivary nucleus
Afferent CN9 sensory fibers terminate in
Solitary nucleus
How many peripheral ganglia are associated with CN9
2
What are the peripheral ganglia associated with CN9
Superior ganglion-smaller
Inferior ganglion
Autonomic fibers for CN9 synapse in
The otic ganglion
General sensory info carried in CN9 is from
Nasopharynx, oropharynx, and portion of the tongue posterior to the sulcus terminal is, uvula, and palatine tonsils
General sensation from the________________ is also carried in CN9
Tympanic cavity
Tympanic cavity sensation is carried by CN9 and cell bodies are located in the ______________
Inferior ganglion.
Then info is conveyed to the CNS and synapse in the Spinal nucleus of trigeminal nerve
Taste info from posterior to the sulcus terminal is is carried by neuron from the _____________.
Inferior ganglion
Axons from these cells synapse in the Superior part of the solitary nucleus.
Incoming fibers from the inferior ganglion do synapse in the lower part of the solitary nucleus. They carry _______________ info from the ________ and _________.
Visceral afferent
Carotid sinus and carotid body
which part of the solitary nucleus is visceral afferent info from the carotid sinus and body synapse in
Lower part of solitary nucleus
Nucleus ambiguus contributes LMN to what three CN
CN 9,10,11
What kind of motor neurons innervated stylopharyngeus
LMN
The inferior salivary nucleus gives rise to
Preganglionic parasympathetic axons
The inferior salivary nucleus preganglionic parasympathetic fibers will synapse in
The otic ganglion
After preganglionic parasympathetic fibers synapse in the otic ganglion they carry __________ fibers that supply the _______
Postganglionic
Parotid glands, buccal glands, and inferior labial glands
What is the apparent origin of CN9
Lateral aspect, superior part of the medulla oblongata
CN9 exits the skull via
The jugular foramen
Travels posterior to the septum
The superior ganglion for CN 9 is located
Inside the cranium
The inferior ganglion of CN9 is located
Outside the cranial vault beyond the jugular foramen
The tympanic nerve arises from the
Inferior ganglion
The tympanic nerve carries preganglionic parasympathetic fibers as well as
Sensory fibers
Tympanic nerve fibers are carried through the ________ into the tympanic cavity
Tympanic canaliculus
The tympanic cavity recieves postganglionic sympathetic fibers from
Superior cervical ganglion which then forms the tympanic plexus
The tympanic plexus carries ____________ info from the…..
Somatosensory
Pharyngotympanic tube, and mastoid air cells
Once preganglionic parasympathetic fibers pass through the tympanic plexus the reform as
The lesser petrosal nerve
The lesser petrosal nerve travels through __________ to the _____ ganglion
Lesser petrosal canal
Otic ganglion
The carotid branch ascends from below and enters CN9 at the
Inferior ganglion
The carotid branch of CN9 carries info from
Chemoreceptors and baroreceptors
Chemoreceptors are located in the
Carotid body
Baroreceptors are found in the
Carotid sinus
Pharyngeal branches of CN9 convey ______ info from the….. may combine with some vagal branches to from the pharyngeal plexus
Sensory
Mucosa of the pharynx
Tonsillar branches of CN9 convey sensory info from
Palatine tonsils and oral mucosa
Lingual branches of CN9 general sensory and ______ info from the _________ posterior to the __________ _______________
Taste, tongue, sulcus terminalis
