Inner Ear Anatomy


Okay so now we’re looking at the inner
ear so this is just a large version of the inner ear,
so those ossicles from the middle ear as the tympanic membrane vibrates a sound
waves hit it, it’s gonna vibrate those ossicles just gonna vibrate it into our
vestibule here and those sound waves come into the cochlea which
is this kind of snail-like structure over here inside that is that your
cochlear ducts so you can see those holes there. Okay on the other side so we
had that vestibulocochlear nerve, so you have two branches of the vestibulocochlear nerve the cochlear branch and the vestibule branch of course the
cochlear branch goes the cochlea the vestibular branch goes over to the
vestibule. Our bony labyrinth is kind of surrounding layer here of all these
bones surround it okay you have your semicircular canals on this side of it,
so our semicircular canals I think of them kind of as an x y & z axis, so it’s
what’s giving us our coordination. So if you have vertigo or something like that
it’s a problem with this part of the inner ear. The bony labyrinth is actually
made up of these membranes here on the inside we’ve got three distinct regions
of these membranes here they’re kind of swollen parts of that membrane
themselves you have the saccule the utricle and the ampulla.

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