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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]
the cochlear duct or scala media (containing endolymph) a region of high potassium ion concentration that the stereocilia of the hair cells project into; The helicotrema, the location where the tympanic duct and the vestibular duct merge, at the apex of the cochlea; Reissner's membrane, which separates the vestibular duct from the cochlear duct
The stria vascularis is part of the lateral wall of the cochlear duct. [1] It is a somewhat stratified epithelium containing primarily three cell types: marginal cells, [1] which are involved in K + transport, and line the endolymphatic space of the scala media. intermediate cells, [1] which are pigment-containing cells scattered among capillaries.
The lateral wall of the cochlear duct is formed by the spiral ligament and the stria vascularis, which produces the endolymph. The hair cells develop from the lateral and medial ridges of the cochlear duct, which together with the tectorial membrane make up the organ of Corti.
Medial to the opening for the carotid canal and close to its posterior border, in front of the jugular fossa, is a triangular depression; at the apex of this is a small opening, the aquaeductus cochleae (or cochlear aqueduct, or aqueduct of cochlea), which lodges a tubular prolongation of the dura mater establishing a communication between the perilymphatic space and the subarachnoid space ...
The vestibular aqueduct parallels the petrous apex, in contrast to the cochlear aqueduct, which lies perpendicular to the petrous apex. It transmits a small vein , and contains a tubular prolongation of the membranous labyrinth , the ductus endolymphaticus , which ends in a cul-de-sac , the endolymphatic sac , between the layers of the dura ...
The vestibular duct or scala vestibuli is a perilymph-filled cavity inside the cochlea of the inner ear that conducts sound vibrations to the cochlear duct. [ 1 ] It is separated from the cochlear duct by Reissner's membrane and extends from the vestibule of the ear to the helicotrema where it joins the tympanic duct .
The tympanic duct or scala tympani is one of the perilymph-filled cavities in the inner ear of humans. It is separated from the cochlear duct by the basilar membrane , and it extends from the round window to the helicotrema , where it continues as vestibular duct .