Cochlea Cross Section

Cross section of a single cochlear turn the scala media filled with endolymph in green is surrounded by the reticular lamina which covers the organ of corti 1 by reissner s membrane 2 on the side of the scala vestibuli and by the lateral wall 3 composed of the stria vascularis and the cochlear promontory. It plays a main role in the equilibrium. The cochlea plural is cochleae is a spiraled hollow conical chamber of bone in which waves propagate from the base near the middle ear and the oval window to the apex the top or center of the spiral.

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The upper bony passage of the cochlea.

Cochlea cross section. A structure that runs the length of the cochlea in the inner e. The osseous bony portion 2. Over the cochlea we can see the vestibule which is the second sensory organ of the inner ear.

In cross section this duct resembles a right triangle. Cross section of cochlea. 27 march 2010 23 09 utc source.

External and middle ears realise the sound transfer. Resting on the basilar membrane is the organ of corti which contains the hair cells that give rise to nerve signals in response to sound vibrations. The labyrinth the inner ear often referred to as the labyrinth is composed of two separate physical parts.

Own work based on. This causes the basilar membrane to vibrate. The spiral canal of the cochlea is a section of the bony labyrinth of the inner ear that is approximately 30 mm long and makes 2 turns about the modiolus.

When a sound wave enters the cochlea by way of the oval window the sound wave travels down a fluid filled chamber scala vestibuli. Separates the cochlear duct from the scala vestibuli. The cochlea is the auditory portion of the inner ear it is a spiral shaped cavity in the bony labyrinth making 2 5 turns around its axis.

We will also review the new cochlea cross section with the organ of corti. A cross section through one of the turns of the cochlea inset showing the scala tympani and scala vestibuli which contain perilymph and the cochlear duct which is filled with endolymph. Permission reusing this file i the copyright holder of this work hereby publish it under the following licenses.