CN X Flashcards
What cerebral hemisphere does nucleus ambiguous receive info from
both cerebral hemispheres
Where are cell bodies of motor fibers carried in vagus located
nucleus ambiguous
Where do pregang parasympathetic fibers arise from
posterior (dorsal) nucleus of the vagus
Where do preganglionic parasympathetic receive info from
indirectly receive info from hypothalamus and carotid sinus
Somatic sensory info terminates where
spinal nucleus of CN V
Taste and viserosensory terminate where
nucleus soliatius
What ganglia associated with CN X
superior and inferior ganglion
Superior Ganglion aka
Jugular ganglion
Inferior ganglion aka
Nodose ganglion
General sensory (somatic sensory) cell bodies in the superior gangion terminate in
spinal nucleus of CN V
Taste from epiglottis cell bodies in inferior ganglion travel to
superior part of nucleus solitarius
Visceral sensory cell bodies in inferior ganglion travel to
inferior part of nucleus solitarius
Where does the vagus nerve originate
lateral aspect of MO
Where does vagus nerve exit the skull
jugular foramen
What branches off before vagus nerve exits skull
meningeal branch
what does the meningeal branch supply
dura of posterior cranial fossa
How is the jugular foramen organized
split in 1/2 by fibrous septum
(X) Vagus and (XI) accessory nerve lie anterior to septum
(IX) glossophargeal lies posterior to septum
Where are the inferior and superior ganglion located
superior just inside jugular foramen
inferior just inferior to jugular foramen
Where is the auricular branch given off
at superior ganglion
What is the path of the auricular branch
through mastoid canaliculus and tympanomastoid fissure to external acoustic meatus
What info does auricular branch carry
sensory info from meatus and small portion of auricle
After exiting the jugular foramen, vagus nerve runs with what
internal jugular vein and internal carotid artery in carotid sheath
Runs with what, inferior to carotid bifurcation?
common carotid and internal jugular vein
What 2 branches are given off at inferior ganglion
pharyngeal branches and branches to carotid
what is pharyngeal plexus
pharyngeal branch, sympathetic fibers from sympathetic trunk, and fibers from CN IX
What does pharyngeal branch supply
motor to pharyngeal constrictors and levator veli palatine muscles
What do branches to carotid carry
viscerosensory about chemoreceptors in carotid body
Where will the superior laryngeal nerve branch off
just inferior to inferior ganglion
Superior laryngeal splits into what
external and internal laryngeal
External laryngeal supply
motor supply to cricothyroid
Internal laryngeal supply
Sensory to laryngeal mucosa superior to vocal cords
What does the recurrent laryngeal supply
motor to all muscles of larynx minus cricothyroid
sensory to larynx inferior to vocal cords
Path of left recurrent laryngeal
passes infront and under aortic arch
Right recurrent laryngeal
passes posterior under subclavian artery before ascending
What do superior and inferior cervical cardiac branches carry
parasympathetic info to cardiac plexus
Where do superior cervical cardiac branches come from
leave vagus nerve and travel with great vessels to cardiac plexus
Where do inferior cervical cardiac branches come from
given off by recurrent laryngeal and travel to cardiac plexus
One branch (superior or inferior) carries viscerosensory info, concerning what
pressure on wall of aorta
nerve stimulated when aortic pressure is too high
what does the vagus do in the thorax
passes posterior to root of ipsilateral lung
route of right vagus after thorax
becomes posterior vagal trunk
Route of left vagus after thorax
becomes anterior vagal trunk
