Cranial Nerve VIII Flashcards
What is the other name for cranial nerve VIII?
vestibulocochlear nerve
What is the apparent origin of the vestibular nerve?
cerebellopontine angle
Where are the cell bodies of the vestibular nerve located?
inferior and superior vestibular ganglion
What is the nucleus of termination for the vestibular nerve?
vestibular nuclear complex (lateral, superior, inferior, medial)
What nerve do most fibers of the vestibulocochlear nerve terminate?
medial vestibular nerve
What nerve do some of the fibers of the vestibulocochlear nerve terminate?
cerebellum by the inferior cerebellar peduncle
Where do the fibers of the vestibular nerve start?
inferior and superior vestibular ganglion
What does the vestibular nerve split into?
inferior and superior fibers
What does the superior branch of the vestibular nerve split into?
Voit’s, lateral ampullar and anterior ampullary nerve
What does Voit’s nerve send fibers to?
saccule
What does the lateral ampullary nerve supply?
utricle, lateral semicircular canal
What does the anterior ampullary nerve supply?
anterior semicircular canal
What does the inferior fibers of the vestibular nerve split into?
saccular and posterior ampullary nerve
What does the saccular nerve supply?
saccule
What does the posterior ampullary nerve supply?
posterior ampullary canal
What type of nerve is cranial nerve VIII?
Sensory only
How does information travel in the vestibulocochlear nerve?
distal to proximal
What is the termination point of the cochlear nerve?
anterior and posterior cochlear nuclei
Where does the cochlear nerve start?
spiral ganglion
Where do the peripheral proccesses go? Where are they from?
go to the saccule, utricle and semicircular canal
come from vestibular ganglion
Where do central processes go? Where are they from?
go to medulla oblongata at the floor of the rhomboid fossa
come from vestibular ganglion
What is an acoustic neuroma also known as?
vestibular schwanoma
What is an acoustic neuroma?
hearing and equilibrium problems unilaterally
What is a vestibular schwanoma?
hearing and equilibrium problems unilaterally
What is tinnitus?
ringing in the ears
What are cochlear implants?
an implant for people with a severe sensorineural hearing loss
What is vestibular disease?
vestibular problem that produces vertigo
How do you differentiate vestibular disease from cervicogenic vertigo?
swivel the patient in a chair and keep their head forward (cervicogenic vertigo)
