Inner ear

The inner ear (inner ear ) is next to the middle and outer ear part of the ear in vertebrates. It consists in mammals from the cochlea (Latin cochlea) and the organ of balance.

The inner ear is a complex designed cavity in the temporal bone, which is called the bony labyrinth ( Labyrinthus osseus ). It is surrounded by bone material which is the hardest material in the human body in accordance with the tooth enamel. The cavity is filled with a liquid, referred to as the perilymph. These fluid-filled cavity a thin-walled membranous labyrinth ( Labyrinthus membranaceus ) is clamped, which in turn is filled with endolymph.

For middle ear, the inner ear, specifically the perilymphatic space, two openings. The " oval window " ( Fenestra vestibuli, Syn oval window ) is closed by the footplate of the stapes and the coupling point of the ossicular chain, where the vibrations caused by sound waves to the inner ear are transmitted. The second opening is the " round window " ( fenestra cochleae ), which ( tympanic membrane secundaria ) is closed by the secondary tympanic membrane and the resulting vibrations in the cochlea damps.

At the cranial cavity, the inner ear three openings. Firstly, the internal auditory canal, which forms the point of passage for the facial nerve, the vestibulocochlear nerve and blood vessels. Furthermore, the very narrow vestibular aqueduct, which contains the endolymphatic duct, which utricle and saccule of ( parts of Endolymphraumes ) begins and its blind sac-like nerve ending is on the rear side of the petrous pyramid between two sheets of the dura mater. Finally, the perilymphatic space of the inner ear has an equally close connection to the skull inside the cochlear canaliculus by which the ductus perilymphaticus pulls. This reaches the posterior fossa at the base of the petrous pyramid.