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end organ of hearing
the neural ends/sensors that will initiate the neural activity that we hear; found in the inner ear
Where in space is the cochlea found in relation to the other parts of the inner ear?
anterior to the other two
What labyrinths are found within the three divisions of the inner ear?
osseous labyrinth and membranous labyrinth
system of canals and cavities within the dense petrous portion of the temporal bone
space between the inner tube (membranous) and the outer bony tube containing perilymph
What is the sequence of physical makeup of the inner ear?
bone on the outside, next perilymphatic space filled with perilymph, then membranous space, then endolymphatic space filled with endolymph at very middle
What is the largest nerve found coming off back of the cochlea?
8th nerve, which carries info up into the higher auditory pathways
What is a unique feature of the placement of the semicircular canals?
any two canals form a nearly right angle
found straight above the vestibule; comes down into the vestibule and is a shared opening into the vestibule for the posterior and superior canals
What are four major features of the vestibule?
pyramid of the vestibule, vestibular crest, elliptical recess, and spherical recess
separates the pyramid of the vestibule on the top from the elliptical and spherical recesses below
What important feature is found within the elliptical recess?
the utricle of the membranous labyrinth
What important feature is found within the spherical recess?
the saccule of the membranous labyrinth
sits at a 30 degree angle to the horizontal, so it's raised toward the top of your head by about 30 degrees
Which end of the superior canal fuses with the superior limb of the posterior canal?
postero-medial end- portion forms the crus commune
Which end of the posterior canal fuses with the superior canal of the posterior canal?
superior limb- portion forms the crus commune
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