Ch. 18 Day 2 Flashcards by Brianna Veenstra | Brainscape

Q

part of ear that collects sound waves and directs them to middle ear

A

external ear

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Q

part of ear we can see

A

auricle/pinna

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Q

2nd part of where sound waves go

A

external acoustic meatus

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Q

seperates external and mid ear

A

tympanic membrane

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Q

line ear canal

A

ceruminous glands

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Q

most of middle ear is the

A

typmanic cavity

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Q

tube in ear that is about 4 cm long

A

auditory tube

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Q

auditory tube helps

A

equalize pressure/balance

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Q

middle ear three auditory ossicles

A

malleus, incus, stapes

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Q

malleus fake name

A

hammer

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Q

incus fake name

A

anvil

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Q

stapes fake name

A

stirrup

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Q

malleus articulates with the

A

tympanic membrane

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Q

when malleus vibrates it vibrates the

A

incus

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Q

stapes sits on what

A

oval window

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Q

auditory ossicles are important to

A

amplify sounds

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Q

muscles that protect violent vibrations for middle ear

A

tensor tympani, stapedius

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Q

inner ear is where there is

A

balance and equilibrum special house receptors

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Q

coiled pathway in the ear is the

A

bony labyrinth

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Q

snail head of bony labyrinth is called

A

vestibule

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Q

snail antena of bony labrinith is called

A

semicircular canals

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Q

middle of snail bony labrinith

A

cochlea

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Q

soft structure in snail bony labyrinth

A

membranous labyrinth

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Q

soft structure to fill in the

A

utricle
saccule

Q

soft structure to fill in semicircular canals

A

semicircular ducts

Q

soft structure to fill in cochlea

A

coclear duct

Q

fluid in bony labyrinth

A

perilymph

Q

fluid in membranous labyrinth

A

endolymph

Q

in vestibule two sacs called

A

utricle and saccule

Q

utricle and saccule contain clusters of hair cells called

A

maculae

Q

cilia of hair cells are embedded into

A

otolithic membrane

Q

otolithic membrane is packed with crystals called

A

otoliths

Q

hair cells synapse with afferent fibers from CN

A

CNVII

Q

utricle orientation

A

horizontally

Q

saccule orientation

A

vertically

Q

utricle to sense

A

forward acceleration and deceleration

Q

saccule to sense

A

verticle acceleration and deceleration

Q

semicicular ducts detect

A

angular motion

Q

each semicircular duct has a swelling called

A

ampulla

Q

ampulla have clustors of

A

hair cells

Q

hair cells of ampulla are on

A

ampullary crest

Q

cilia of hair cells are embedded in

A

ampullary cupula

Q

hair cells monitored by neurons from the

A

vestibular ganglion

Q

axons of these vestibular ganglion form

A

vestibular nerve

Q

coiled makes 2.5 turns in the central hub

A

cochlea

Q

cochlea central hub called

A

modioulus

Q

central cochlear duct is filled with

A

endolymph

Q

cochlea oval window is at the base of the

A

vestibular duct

Q

oval window filled with

A

perilymph

Q

round window is at base of

A

tympanic duct

Q

round window is filled with

A

perilymph

Q

spiral organ aka

A

organ of corti

Q

spiral organ have cilia of

A

hair cells

Q

spiral organ more flexible basilar membrane than

A

tectorial membrane

Q

spiral organ hair cells monitored by neurons from the

A

spiral ganglion

Q

axons of spiral ganglion form the nerve CN

A

CNVIII

Q

basilar membrane that is low frequency has

A

low pitch

Q

CNVIII cochlear nuclei is in the

A

medulla oblongata

Q

CNVIII has inferior colliculi on

A

both sides
thalamus
auditory cortex