Vestibulocochlear - CN. VIII Flashcards
The vestibulocochlear nerve is?
Sensory
What two nerves make up the vestibulocochlear nerve?
vestibular nerve and cochlear nerve
The vestibular nerve terminates?
Vestibular nuclear complex
Vestibular nuclear complex is composed of ?
superior, inferior, medial, and lateral parts
Where is the vestibular ganglion located?
internal acoustic meatus
What 3 inner ear structures does the vestibular ganglion extend to?
saccule, utricle, semicircular canals
The vestibular ganglion extends central processes to where?
vestibular nuclei in the medulla oblongata on the floor of the rhomboid fossa
Majority of vestibular nerve fibers terminate where?
medial vestibular nucleus (schwalbe)
A few vestibular nerve fibers travel to?
Directly to the cerebellum by the inferior cerebellar peduncle
What is the direction that information travels in the vestibulocochlear nerve?
distal to proximal
What is the apparent origin of vestibulocochlear?
cerebellopontine angle (recess)
Where does the nerve travel?
the posterior cranial fossa in the internal acoustic meatus
The vestibulocochlear nerve enters along with what nerve?
Facial nerve (through the internal acoustic meatus)
The cochlear nerve carries how many fibers inside the temporal bone?
30 ,000- 40,000 fibers along the inferior part of facial nerve
cochlear nerve consists of?
Bipolar neurons
Bipolar neurons
cell bodies in spiral ganglion of cochlea
sensory nerve pathway for the cochlear nerve
spiral ganglion peripheral process (dendrites) extend from the cochlear to the spiral organ cochlear nerve to the superior/posterior part of M.O.
cochlear terminate on 2 cochlear nuclei
From the cochlear nuclei where do axons go?
From the trapezoid nuclei where do axons go?
What leaves the temporal bone and reaches the spiral ganglion of cochlea?
cochlear nerve
The vestibular nerve carries how many fibers?
~20,000 fibers
The vestibular nerve divides into what branches?
The smaller inferior branch has how many fibers
