Hearing Physio Flashcards
the stapes lies on top of which area of the inner ear?
scala vastibuli
where do the hair cells lie in the cochlea?
on the basilar membrane
what are the long hair cells called?
kinocilium
what are the short hair cells called?
stereocilia
what connects the hair cells of different lengths?
tip links
what are the hair cells bathed in at the top?
endolymph
what is high in endolymph fluid?
high in K+ and low in Na
what surrounds the base of the hair cells?
perilymph
what is perilymph high in?
high in Na and low in K
when vibrations happen and the hair cells move, what happens?
gates open up and K+ flows in at top of cells from the perilymph
if you move to the higher side of the kinocilia, what happens to cell?
depolarized
if you move to the lower side of the stereocilia, what happens to cell?
hyperpolarized
where are high tones heard in the cochlea?
at the base…entrance near the oval window
where are low tones heard in the cochlea?
at the apex…middle of snail
where is the cochlea nuclei for CN VIII?
medulla
