Lecture 27 Flashcards
1
Q
flow of sound energy from tympanum to cochlea
A
sound E change P around ear, move tympanic membrane
muscle clamp down malleus, incus, stapes
3 fluid filled compartment: scala vestibuli, scala media, scala tympani
basilar membrane vibrate
2
Q
flow of sound energy in cochlea
A
basil membrane move up, shear hair cell body with tectorial membrane
hair bend to tallest cilia side
tip link pull on, mechanical ion channel physically open
K channel open, depolarize b/c high conc of K in cochlea duct fluid
3
Q
transmit to head
A
8th cranial nerve
medulla, bilateral (ipslateral & contralateral)
midbrain
thalamus
primary auditory cortex
4
Q
vestibular
A
semicircular canal, utricle, saccule
vestibular ocular reflex
4
Q
semicircular canal
A
ampula, cupula, stereocilia, hair cell
