Term
| three parts of the external ear? |
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Definition
-Pinna (oracle) ear flap
-External auditory canal w/ceruminous glands
-External acoustic meatus (lined w/ a wax that has antibacterial properties)
-Tympanic membrane: eardrum |
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Term
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Definition
-tympanic cavity
- auditory tube (eustachian tube) connects middle ear w/ pharynx
allows pressure equalization
- auditory ossicles:
Malleua:“hammer” that hits the incus
Incus: the “anvil"
Stapes:“stirrup” w/ an oval base
-oval window separates middle& inner ear |
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Term
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Definition
- tensor tympani
attaches to malleus
stabilizes malleus
-stapedius attaches to the stapes
minimizes movement of stapes |
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Term
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Definition
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Term
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Definition
bony: has perilymph
membranous: has endolymph |
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Term
| 2 divisions of the inner ear |
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Definition
-vestibular complex
(vestibule and semicircular canals)
(equilibrium)
-cochlea (hearing) |
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Term
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Definition
| these cause the waves in your ear |
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Term
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Definition
-oval window
stapes attached
at beginning of vestibular duct of
-round window
at end of tympanic duct |
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Term
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Definition
all receptors are "hair cells"
-they have stereocilia (projections off the hair cell)
-kinocilium (one long projection that helps orient what the cell does) |
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Term
| How stereocilia and kinocilia work? |
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Definition
| If the stereocilia bends toward the kinocilium it will stimulate the cell and tell it to fire |
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Term
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Definition
has a) semicircular canals and
b) Utricle and Saccule |
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Term
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Definition
-anterior, posterior, lateral
-have an ampulla (swollen area around the base of each canal) |
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Term
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Definition
| one specific spot with the crista which has the haircells--> has the kinocilium and stereocilia |
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Term
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Definition
| a gelatinous substance that surrounds the hair fibers; when water rushes by it helps them bend more (makes them more sensitive) |
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Term
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Definition
makes hair fibers sensitive
helps you determine where your head is in space (shaking no,nodding, rolling head around) |
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Term
| Utricle and Saccule do what? |
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Definition
| detect gravity and linear acceleration |
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Term
Both the utricle and saccule have what?
-otolith
-statoconia |
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Definition
each has macula with haircells
these haircells project into the otolith (Statoconia &gelatinous substance)
statoconia: crystals on the gelatinous substance that create drag when you tip head back |
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Term
| READ OVER NEURAL PATHWAYS |
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Definition
| READ OVER NEURAL PATHWAYS |
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Term
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Definition
Vestibular (top)
Cochlear (middle)
Typmanic (bottom) |
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Term
Cochlear Ducts (VCT)
filled with |
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Definition
Vestibular (top) --> perilymph
Cochlear (middle)-->endolymph
Typmanic (bottom)-->perilymph |
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Term
Cochlear Duct
VCT connections |
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Definition
Vestibular (top) -->oval window
Cochlear (middle)--> btwn vestibular and tympanic ducts
Typmanic (bottom)-->round window |
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Term
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Definition
| contain hair cells that are stimulated by sound vibrations |
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Term
| Organ of Corti: where is it |
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Definition
| btwn basilar membrane and tectorial membrane |
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Term
| Movement compresses _____ and ____ |
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Definition
| cochlear duct and organ of corti |
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