Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
12 Cards in this Set
- Front
- Back
How long is the cochlear duct/scala media?
|
34 mm length complies with general shape of the osseous cochlea. It goes from the OSL and lies along outer wall
|
|
What forms the floor and roof of the cochlear duct?
|
Floor-basilar membrane; roof-vestibular membrane/reissners membrane
|
|
what is the cochlear duct filled with?
|
Endolymph/Ectodermal origin
|
|
What communicates with what in the cochlear duct?
|
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.
|
|
What are some alternative names for the cochlear duct?
|
membranous cochlea and scala media
|
|
What does the cd/sm do anatomically?
|
completes the division of the scala vestibule and the scala tympani
|
|
Describe the location of Reissner's membrane.
|
From superior spiral lamina to the superior stria vascularis (lateral wall of the cochlear duct)
|
|
Describe the spiral ligament
|
Outer cochlear wall, thickened periosteum it runs the length of the cochlear tube and projects inward to form the basilar crest
|
|
Describe the location of the Basilar membrane
|
Basilar membrane reaches from the modiolar attachment on the osseous spiral lamina and connects to the basilar crest of the spiral ligament
|
|
What type of fluid does the cochlear duct contain?
|
Ectodermal origin/endolymph. Fluid spaces on either side of cochlear duct are of mesodermal origin and contain perilymph (scala v and scala t)
|
|
What kind of tube is the cochlear duct?
|
Closed tube
|
|
What is only outlet of the cochlear duct?
|
Ductus reuniens
|