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17 Cards in this Set
- Front
- Back
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The osseous cochlea is in the ________ area of the _______ _________.
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anterior
bony labyrinth |
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The osseous cochlea is a ________ tube coiled up on itself - it looks like a _____ _____. It has ________ turns around a _______ core.
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hollow
snail shell 2 and 5/8 central |
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What is the central core or hub of the osseous cochlea?
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modiolus
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What is a spiral crest of bone that projects into the lumen of the cochlear tube?
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osseous spiral lamina
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What is described as being like the flange of a screw?
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osseous spiral lamina
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The osseous spiral lamina divides the opening of the cochlear tube into what two ducts?
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scala vestibuli
scala tympani |
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What is the smallest top part of the cochlear tube called?
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apex or cupola
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At the _____ of the cochlear tube, the OSL __________ and allows __________ between the scala vestibuli and the scala tympani. This opening is called the _____________.
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disappears
communication helicotrema (hole of coil/cochlea) |
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How long is the width of the base of the cochlea?
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9 mm
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How long is it from the base to the apex of the cochlea?
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5 mm
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What is the large opening in the center of the base of the cochlea called?
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foramen centrale
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Nerve fibers from the _____ of the cochlea pass through the foramen centrale.
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apex
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What is the little spiral tract on the periphery of the base called?
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tractus spiralis foramina
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Nerves fibers from the _____ of the cochlea pass through the tractus spiralis foramina.
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base
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The OSL has ___ shelves of _____ with an __________ between them. This opening is called the _________ _____________. The upper shelf end is the __________ _____ and the lower shelf is the __________ _____.
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2
bone opening perforate habenula vestibular lip tympanic lip |
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The ____________ auditory meatus is the _____________ in the bone which will carry the ___________ (8th) nerve info from the ________ to the cortex.
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internal
passageway auditory cochlea |
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The OSL is __________ at the base and gets smaller and projects ______ into the tube as it reaches the _____. At the end of the apex, it __________.
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largest
less apex disappears |
