Exam 2- CN 8 Flashcards
The vestibulocochlear nerve is purely
Sensory
How many nerves is the vestibular cochlear nerve made out of?
2
Vestibular
Cochlear
Where does the vestibular nerve terminate
In the vestibular nuclear complex
How many parts are in the vestibular nuclear complex
4
Superior, medial, lateral, inferior
Where do most of the vestibularcochlear nerves terminate in the vestibular nuclear complex
Medial aspect
Aka Schwalbe
Fibers carried in the vestibular nerve arise from cell bodies located where
Vestibular ganglion
The vestibular ganglion has how many parts
2
Superior, Inferior
Where does the cochlear nerve terminate
2 cochlear nuclei
Anterior and posterior
Composed of axons from the spiral ganglion
THe cochlear nerve is made up of _________ neurons who’s cell bodies are in the ________ ganglion of the cochlea
Bipolar, spiral
Where are the two cochlear nuclei located
The posterior superior medulla oblongata, lateral to the vestibular nuclei
Once axons reach the cochlear nuclei they cross and go to the other side of the brainstem and synapse in the
Trapezoid nuclei, from which axons form the lateral lemniscus
Peripheral processes from the vestibular ganglion extend to what 3 inner ear structures
Saccule, the utricle, and the semicircular canals
What is another name for the medial vestibular nucleus
Schwalbe
Fibers from the vestibular nuclei will travel directly to the cerebellum via the
Inferior cerebellum peduncle
What is the apparent origin of the vestibulocochlear nerve
Cerebellopontine angle
Information from the vestibulocochlear nerve travel in what direction
Distal to proximal
How many fibers does the cochlear nerve carry
30-40,000
The cochlear nerve traverses the internal acoustic meatus ______ to the facial nerve
Inferior
After the cochlear nerve leaves the temporal bone it reaches the
Spiral ganglion of the cochlea
The vestibular nerve carries how many fibers
20,000
The inferior branch of the vestibular nerve carries
8,000 fibers
What two nerves make up the inferior branch of the vestibular nerve
Saccular nerve, posterior ampullary nerve
The superior branch of the vestibular nerve has
12,000 fibers
Formed by the lateral and anterior ampullary nerves
The utricle is supplied by
A branch from the lateral ampullary nerve and a branch directly off the superior branch
