Lesson 2 - Hearing and Equilibrium Anatomy and Functions

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20 Terms

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Internal ear

Contains cochlea, vestibule, and semicircular canals.

<p>Contains cochlea, vestibule, and semicircular canals.</p>
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Bony labyrinth

Cavity in temporal bone filled with perilymph.

<p>Cavity in temporal bone filled with perilymph.</p>
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Membranous labyrinth

Contains semicircular ducts, utricle, saccule, cochlear duct.

<p>Contains semicircular ducts, utricle, saccule, cochlear duct.</p>
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Cochlea

Anatomical structure responsible for hearing.

<p>Anatomical structure responsible for hearing.</p>
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Spiral organ

Contains hair cells covered by jelly-like material.

<p>Contains hair cells covered by jelly-like material.</p>
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Tympanic membrane

Vibrates in response to sound waves.

<p>Vibrates in response to sound waves.</p>
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Ossicles

Three small bones: malleus, incus, stapes.

<p>Three small bones: malleus, incus, stapes.</p>
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Oval window

Membrane that stapes presses against.

<p>Membrane that stapes presses against.</p>
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Perilymph

Fluid in bony labyrinth.

<p>Fluid in bony labyrinth.</p>
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Endolymph

Fluid in membranous labyrinth.

<p>Fluid in membranous labyrinth.</p>
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Basilar membrane

Vibrates to specific sound frequencies.

<p>Vibrates to specific sound frequencies.</p>
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Sensorineural deafness

Hearing loss due to nerve damage.

<p>Hearing loss due to nerve damage.</p>
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Presbycusis

Age-related hearing loss, especially high tones.

<p>Age-related hearing loss, especially high tones.</p>
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Vestibular apparatus

Contains equilibrium receptors for balance.

<p>Contains equilibrium receptors for balance.</p>
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Static equilibrium

Monitored by maculae in utricle and saccule.

<p>Monitored by maculae in utricle and saccule.</p>
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Dynamic equilibrium

Monitored by semicircular canals.

<p>Monitored by semicircular canals.</p>
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Crista ampullaris

Receptor region in ampulla of semicircular canals.

<p>Receptor region in ampulla of semicircular canals.</p>
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Maculae

Hair cells that detect head position.

<p>Hair cells that detect head position.</p>
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Stereocilia

Hair-like structures on hair cells.

<p>Hair-like structures on hair cells.</p>
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Kinocilium

Single long hair cell structure in macula.

<p>Single long hair cell structure in macula.</p>