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The organ of Corti is located in the scala media of the cochlea of the inner ear between the vestibular duct and the tympanic duct and is composed of mechanosensory cells, known as hair cells. [2] Strategically positioned on the basilar membrane of the organ of Corti are three rows of outer hair cells (OHCs) and one row of inner hair cells ...
In mammals, the auditory hair cells are located within the spiral organ of Corti on the thin basilar membrane in the cochlea of the inner ear. They derive their name from the tufts of stereocilia called hair bundles that protrude from the apical surface of the cell into the fluid-filled cochlear duct .
The basilar membrane is a pseudo-resonant structure [1] that, like the strings on an instrument, varies in width and stiffness. But unlike the parallel strings of a guitar, the basilar membrane is not a discrete set of resonant structures, but a single structure with varying width, stiffness, mass, damping, and duct dimensions along its length.
Human ear anatomy, with the cochlea "uncoiled" showing frequency mapping to different regions of the basilar membrane. Cross-sectional view of the organ of Corti within the cochlea. The basilar membrane is labeled "basilar fiber." The basilar membrane and the hair cells of the cochlea function as a sharply tuned frequency analyzer. [3]
The cochlear duct (a.k.a. the scala media) is an endolymph filled cavity inside the cochlea, located between the tympanic duct and the vestibular duct, separated by the basilar membrane and the vestibular membrane (Reissner's membrane) respectively. The cochlear duct houses the organ of Corti. [1]
In the cochlea, a shearing movement between the tectorial membrane and the basilar membrane deflects the stereocilia, affecting the tension on the tip-link filaments, which then open and close the non-specific ion channels. [2] When tension increases, the flow of ions across the membrane into the hair cell rises as well.
The hair cells are the primary auditory receptor cells and they are also known as auditory sensory cells, acoustic hair cells, auditory cells or cells of Corti. The organ of Corti is lined with a single row of inner hair cells and three rows of outer hair cells. The hair cells have a hair bundle at the apical surface of the cell.
Deiters' cells, also known as outer phalangeal cells or cells of Deiters (English: / ˈ d aɪ t ər z /), are a cell type found within the inner ear. They contain both microfilaments and microtubules which run from the basilar membrane to the reticular membrane of the inner ear.