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12 Cards in this Set
- Front
- Back
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How long is the cochlear duct/scala media?
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34 mm length complies with general shape of the osseous cochlea. It goes from the OSL and lies along outer wall
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What forms the floor and roof of the cochlear duct?
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Floor-basilar membrane; roof-vestibular membrane/reissners membrane
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what is the cochlear duct filled with?
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Endolymph/Ectodermal origin
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What communicates with what in the cochlear duct?
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Bony spiral lamina and basilar membrane are joined with the vestible at the basal end in such a manner that the only direct communication is between the scala vestibuli and the vestibule. Scala tympani does not communicate with vestibule except through the heliocotrema.
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What are some alternative names for the cochlear duct?
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membranous cochlea and scala media
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What does the cd/sm do anatomically?
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completes the division of the scala vestibule and the scala tympani
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Describe the location of Reissner's membrane.
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From superior spiral lamina to the superior stria vascularis (lateral wall of the cochlear duct)
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Describe the spiral ligament
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Outer cochlear wall, thickened periosteum it runs the length of the cochlear tube and projects inward to form the basilar crest
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Describe the location of the Basilar membrane
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Basilar membrane reaches from the modiolar attachment on the osseous spiral lamina and connects to the basilar crest of the spiral ligament
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What type of fluid does the cochlear duct contain?
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Ectodermal origin/endolymph. Fluid spaces on either side of cochlear duct are of mesodermal origin and contain perilymph (scala v and scala t)
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What kind of tube is the cochlear duct?
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Closed tube
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What is only outlet of the cochlear duct?
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Ductus reuniens
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