Hearing and Equilibrium - Three Detect motion in three...

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Hearing and Equilibrium Special Senses Addendum
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The Ear Is divided into 3 anatomical regions 1. External ear External auditory meatus to tympanic membrane
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The Ear Ceruminous glands secrete cerumen – ear wax
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The Ear 1. Middle Ear Medial to tympanic membrane Contains 3 auditory ossicles Auditory tube connects middle ear to pharynx
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Middle Ear
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Auditory Ossicles Malleus Incus Stapes Air movement Base of stapes fills the oval window 20X amplification
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The Ear 1. Inner Ear Consists of hollow bony structures filled w/ fluid -- endolymph Contains the organs of: Equilibrium – semicircular canals Hearing -- cochlea
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The Inner Ear
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The Inner Ear
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Semicircular Canals
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Unformatted text preview: Three Detect motion in three planes: 1. Yes 2. No 3. Tilting head from side to side Semicircular Canals Hollow bony tubes Filled with endolymph Inside lined with hair cells specialized neurons Axons, in part, form VIII Otoliths float across hair cells when head is in motion. Hair Cells Hair Cells Otoliths Activate hair cells Cochlea Spiral shaped Hollow bony, filled with endolymph Lined by hair cells Organ of Corti consists of: 1. Hair cells 2. Tectorial membrane stimulates hair cells Cochlea Cochlea Organ of Corti Organ of Corti VIII Hair Cells...
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This note was uploaded on 04/11/2008 for the course BIO 220 taught by Professor Williams during the Spring '08 term at Minnesota State University, Mankato.

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Hearing and Equilibrium - Three Detect motion in three...

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