auditory system Flashcards
What does the stapes connect to so that the sound waves can be sent into the cochlea?
oval window
The ossicles of the middle ear connect to the __ and ___ muscles which are INNV by the ___.
tensor tympani and stupedius muscles, CN VIII
definition: fluid filled cavities in the inner ear that are surrounded by tissue
cochlea
Definition: contains the sensory epithelium (hair cells)
organ of corti
Where is the organ of corti found?
in the cochlea/inner ear
Human speech is ___ kilohertz
3 KHz
The axons from the inner and outer hair cells within the cochlea connect and become the ___.
CN VIII (cochlear division)
The (inner/outer) hair cells pick up sound in the cochlea.
inner hair cells
What is the base of the hair cells in the cochlea?
basilar membrane
When the basilar membrane vibrates, it will move the hair cells into the ______ and activate it.
tectorial membrane
A sound wave causes a ___ in the fluid filled portion of the cochlea.
pressure wave
The membrane at the base of the basilar membrane will vibrate with (low/high) frequencies.
high
The membrane at the apex of the basilar membrane will vibrate with (low/high) frequencies.
low
definition: hair cells have a characteristic tuning curve (they’re coded for a specific frequency)
tonotopic
CN VIII (cochlear division) enters the ____ to have its axons synapse on the ventral and dorsal cochlear nuclei.
rostral medulla
