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26 Cards in this Set
- Front
- Back
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inner ear does hearing and _______ |
equilibrium |
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inner ear parts: |
Bony Labyrinth Membranous Labyrinth Cochlear: Vestibule: Endolymph |
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Bony Labyrinth filled with _______ high _______, low _______ |
perilymph NA, K |
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Membranous Labyrinth filled with _______ high _______, low _______ |
endolymph K+, Na |
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drainage: Cochlea - saccule, the semicircular canals -utricle
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:P |
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largest microvilli is |
kinocilium
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Organ of Corti: function has ______ that project into _________membrane |
hearing, hairs, tectorial
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Cristae: function hairs project to |
Angular acceleration cupula |
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Maculae: function hairs project to |
linear acceleration otolithic membrane
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Tip-links are channels |
mechanically gated ion |
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sound is a series of _______ waves |
pressure |
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malleus, incus, and stapes together make up the |
Ossicles |
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______ attached to malleus |
Tensor tympani |
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Tensor tympani contracts when |
face is touched, person is startled |
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Stapedius is attached to
it filters out |
stapes low frequency background sounds
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stapes presses on ______________, this causes |
oveal window of inner ear propagation of waves through the perilymph of the inner ear (cochlea) |
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Auditory portion of the inner ear
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cochlea |
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cell bodies for peripheral projections to hair cells
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Spiral ganglion |
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3 major chambers: |
Scala media - filled with endolymph Scala vestibuli - fillled with perilymph (oval window) Scala tympani - filled with perilymph (round window) |
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separates the scala media and scala typmani
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basliar membrane |
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basilar membrane |
Base is narrow and thick: only high frequency noise can move it apex is thin and wide: low frequency noise will move it
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Intensity will be interpreted by the number |
action potentials |
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loud sound = ______ amplitude higher amplitude, ______action potentials |
high, more |
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sound travels through _________pathway |
lateral lemniscus |
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location of sound path |
superior olivary nucleus - thalamus- auditory cortex
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Larger deficit with air conduction
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Conductive hearing loss
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