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34 Cards in this Set
- Front
- Back
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The inner ear is where we find the ____ _________ __ ______, the neural _____/_______ that will initiate the neural activity to hear - this is what makes the inner ear ________.
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end organ of hearing
ends/sensors special |
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What are the three divisions of the inner ear and what are they responsible for?
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1. Vestibule - balance
2. Semicircular Canals - balance 3. Cochlea - hearing |
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The cochlea is ________ in the auditory mechanism, the SCC are in the ________ quadrant, and the vestibule is ___ __________ the two.
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anterior
posterior in between |
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Each division of the inner ear has what two structures? When do they attain full size?
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An Osseous Labyrinth
A Membranous Labyrinth Middle of fetal life |
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What is a system of canals and cavities within the dense petrous portion of the temporal bone?
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Osseous Labyrinth
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What is a series of communicating membranous sacs and ducts within the osseous labyrinth?
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Membranous Labyrinth
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What type of fluid does the inner membranous tube contain?
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Endolymph
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What is the space between the inner membranous tube and the outer osseous tube called?
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Perilymphatic Space
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What type of fluid fills the perilymphatic space?
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perilymph
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The surface of the bony (osseous) canal is covered with a _________ ________.
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fibrous membrane
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Attached to the fibrous membrane is a __________ ___________ __________ which secretes a clear serous fluid called _________.
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perilymphatic epitherlium membrane
perilymph |
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The oval window is in the __________ wall of the __________.
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tympanic
vestibule |
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The vestibule is between the ________ and the _______________ ________.
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cochlea
semi circular canals |
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How many semicircular canals are there and what are they called?
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3:
superior posterior lateral |
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Any two of the semicircular canals form nearly a _____ _____.
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right angle
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The lateral SCC opens into the _________ on _____ _____.
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vestibule
both ends |
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The _________ and _________ canals have an ____________ of their own on one end.
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superior
posterior opening |
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Straight above the vestibule, the posterior and superior canals have a __________ _______ that comes down into the vestibule and they ________ that opening.
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common cruz
share |
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How many openings are there to the 3 SCCs?
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five
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What forms the central portion of the osseous labyrinth?
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the osseous vestibule
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The osseous vestibule is _____ in shape, __ mm ant-post, __ mm deep and the lateral wall contains the ____ _______.
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oval
5 3 oval window |
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Name the 4 features of the vestibule.
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1. Pyramid of the Vestibule
2. Vestibular Crest 3. Elliptical Recess 4. Spherical Recess |
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What separates the pyramid of the vestibule on the top from the elliptical and spherical recesses below?
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vestibular crest
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The _________ ________ is a prominence that projects out _________ you, while the recesses below are _________ in away from you. They are ____________ in the bone. The __________ ___ ___ ________ is also a recess.
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vestibular crest
towards caved recesses pyramid of the vestibule |
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The elliptical recess houses the ________ and the spherical recess houses the _________ of the membranous labyrinth.
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utricle
saccule |
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The SCCs comprise the ________ area of the bony labyrinth and _____ into the ___________. Each canal is about ____ of a circle and contains a ___________ ______ which occupies ___ of the osseous duct.
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posterior
open vestibule 2/3 membranous duct 1/4 |
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A dilation called an ________ is at the end of each _______ where it joins the ________.
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ampulla
canal vestibule |
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The lateral SCC sits at a ____ degree angle to the horizontal, so it's _________ toward the top of your head.
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30
raised |
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The apullary anterior end of the lateral canal goes into the _______ vestibule.
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upper
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The posterior end of the lateral canal goes into the _______ vestibule.
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lower
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The antero-lateral end of the superior canal is _________ and joins the ______ vestibule.
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ampulated
upper |
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The postero-medial end of the superior canal _______ with the superior limb of the posterior canal to form the _______ ___________.
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fuses
crus commune |
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The upper limb of the posterior canal fuses with the ________ canal to form the ________ ________.
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superior
crus commune |
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The lower ampulated limb of the posterior canal opens into the ________ vestibule.
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lower
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