Hearing Flashcards
Vestibular Sense
helps you keep your balance and sense your body’s position in space
1️⃣what happens at the pinna/auricle?
2️⃣what is it’s function ?
1️⃣it is the cartilaginous outside part of the ear where the sound wave first reaches
2️⃣ Channel sound waves into the external auditory canal
What does bony labyrinth contain ?
cochlea, vestibules, semicircular canals
what does membranous labyrinth contain ?
bathed in K rich fluid
where is inner ear?
it sits in bony labyrinth
endolymph
K rich fluid in which membranous labyrinth baths
perilymph
- thin layer of fluid that suspends membranous in the bony
- brings endolymph to inner ear
External auditory canal
direct sound waves to the tympanic membrane/eardrum
Eardrum/ tympanic membrane
Vibrates when sound waves come
Which sound waves have greater intensity and more amplitude?
Louder sounds
what do sound waves with higher frequency do?
Vibrate more or less?
Vibrate more
What are the bones connected to the eardrum called together and individually?
Stapes, malleus & incus are called ossicles
What does the eustachian tube do?
It connects the middle ear to the nasal cavity
Where do high and low frequency sound waves go in the cochlea?
High frequency sound waves are detected at the start and
low frequency sound waves are detected in the end of the cochlea
basilar tuning
process by which the basilar membrane in the cochlea of the inner ear responds to different frequencies of the sound
in short = Responding to different frequencies of the sound
Contralateral side
Acting on the opposite side of the body
ipsilateral side
Acting on the same side of the body
elliptical window
window where the fluid starts flowing in the cochlea
circular window
Window that is opened when the fluid flows in the opposite direction in the cochlea
What is the top of the hair cell called and what is on top of it?
it is called hair bundle and it contains kinocilium
tip link
spring that joins kinocilium to the others
tono-typical mapping
map inside the brain for each frequency that is connected to the frequency dedicated part of the cochlear
which ion enters the hair cell when the tip link is stretched?
K+ ions
