Exam 2: CN9 Flashcards
CN9 carries
Motor
Sensory
Autonomic fibers
Glossopharyngeal N motor to
Stylopharyngeus
CN9 sensory to
Pharynx
Taste from post tongue
Parasympathetic to parotid
Motor fiber cell bodies located in
Superior part of nucleus ambiguus
Preganglionic parasympathetic fibers arise from
Inferior salivary nucleus
Sensory fibers terminate in
Solitary nucleus
Spinal nucleus of trigeminal
2 peripheral ganglion associated with glossopharyngeal nerve
Superior ganglion
Inferior ganglion
Inferior ganglion aka
Petrosal ganglion
General sensory from
Nasopharynx Oropharynx Post. Tongue Uvula Palatine tonsils Tympanic cavity
Cell bodies of general sensory info located in
Inferior ganglion
General sensory axons synapse in
Spinal nucleus of trigeminal
Taste neuron cell bodies located in
Inferior ganglion
Axons of taste neurons synapse is
Sup part of solitary nucleus
Visceral afferent information from carotid sinus and carotid body have cell bodies in ___ and synapse in ___
Inferior ganglion
Lower part of solitary nucleus
___ contributes LMN to CN IX, X, XI
Nucleus ambiguus
Inferior salivary nucleus gives rise to
Preganglionic parasympathetic axons
Preganglionic parasympathetic axons from inferior salivary nucleus synapse in
Otic ganglion
Otic ganglion gives rise to
Postganglionic fibers that supply parotid gland, buccal gland, inferior labial glands
AO of glossopharyngeal
Lateral aspect of superior MO
CN9 exits skull at
Jugular foramen
Location of inferior and superior ganglion
Either side of jugular foramen; Superior located inside, inferior located outside
Tympanic N arises from
Inferior ganglion
Tympanic N carries
Preganglionic parasympathetic
Sensory
Fibers in tympanic N carried through ___ into tympanic cavity
Tympanic canaliculus
In tympanic cavity, tympanic N receives ___ from ____ and forms tympanic plexus
Postganglionic sympathetic
Superior cervical ganglion
Tympanic plexus carries somatosensory info from
Tympanic cavity
Pharyngotympanic tube
Mastoid air cells
Postganglionic sympathetic fibers supply
Smooth muscle of blood vessels, mostly at arterial level
____ past through tympanic plexus and reform as ___
Preganglionic parasympathetic fibers
Lesser petrosal N
Lesser petrosal N travels through lesser petrosal canal to
Otic ganglion
Carotid branch enters nerve at
Inferior Ganglion
Carotid branch carries afferent info from
Chemoreceptors in carotid body and baroreceptors in carotid sinus
Chemoreceptors sense
Chemical concentration in blood
Baroreceptors sense
Pressure
___ convey sensory info from mucosa of pharynx
Pharyngeal branches
Pharyngeal branches combine with ___ to form pharyngeal plexus
Vagal branches
Muscular branch supplies
Stylopharyngeus
Tonsillar branches carry sense from
Palatine tonsils and oral mucosa
____ carry gen sense and taste from tongue, post to sulcus terminalis
Lingual branches
