auditory structures Flashcards
external and middle ear function
hearing
inner ear function
hearing and equilibrium
external ear parts
auricle/pinna
external auditory canal
tympanic membrane
auricle/pinna
elastic cartilage covering skin
helps direct sound to external auditory canal
external auditory canal
lined with hairs and cermunous glands
tympanic membrane
eardrum
border between external ear and middle early
thin layer of two layers of epithelium with connective tissue in between
vibrates from soundwaves
middle ear
air filled space with auditory ossicles and two passages for air
auditory or eustachian tube
opening to pharynx, equalizes pressure
second air opening is passage to _____in mastoid process
mastoid air cells
pathway of middle ear
tympanic membrane–>malus–>incus–>stapes–> foot of stapes in oval window
oval window
connection between inner ear and middle ear
foot of stapes help in place by annular ligament
inner ear made of
bony labrynth and membrenous labrynth
bony labrynth
tunnels and chambers in temporal bone
cochlea (of bony labrynth) function
hearing
vestibule (of bony labrynth) function
balance
semicircular canals (of bony labrynth) function
balance
membranous labyrinth
membranous tunnels and chambers suspended bony labyrinth
endolympth
in membranous labryinth
perilymph
in spaces between membraneous labrynth and periostium of bony labrynth
three regions of the cochlea
scala vestibuli,scala tympani and cochlear duct (scala media)
scala vestibuli connects to the
oval window
scala tympani (2nd choclear chamber) connects to the
round window
scala vetibuli and scala tympani are filled with
perilymph
path from oval window
scala vetibuli–>helicotrema–> scala tympani–> round window
scala vestibuli is ___membrane
vestibular membrane
scala tympani is ____membrane
basilar membrane
cochlear duct (scala media)
space betwen vestibular and basilkar membrane
filled with endolymph
near oval window basilar membrane responds to______ vibrations
high frequency
near helicotrema basilar membrane responds to _____vibrations
low frequency
spiral organ (organ of corti)
contains hair cells (sensory cells)
located in cochlea duct
sterocillia
hair like microvilai on ends of hair cells
tips of inner hair cells embedded in
tectorial membrane