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2 Structure. Toggle Structure subsection. 2.1 Microanatomy. 2.2 Sexual dimorphism. 3 Function. ... The cochlea is the part of the inner ear involved in hearing.
The cochlea is also tonotopically organized, meaning that different frequencies of sound waves interact with different locations on the structure. The base of the cochlea, closest to the outer ear, is the most stiff and narrow and is where the high-frequency sounds are transduced.
All of these structures together constitute the cochlea. [12] In therian mammals, the lagena is extended still further, becoming a coiled structure (cochlea) in order to accommodate its length within the head. The organ of Corti also has a more complex structure in mammals than it does in other amniotes. [12]
The cochlea is the tri-chambered auditory detection portion of the ear, consisting of the scala media, the scala tympani, and the scala vestibuli. [9] Regarding mammals, placental and marsupial cochleae have similar cochlear responses to auditory stimulation as well as DC resting potentials. [12]
The cochlea has three fluid-filled sections (i.e. the scala media, scala tympani and scala vestibuli), and supports a fluid wave driven by pressure across the basilar membrane separating two of the sections. Strikingly, one section, called the cochlear duct or scala media, contains endolymph. The organ of Corti is located in this duct on the ...
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 shape of Hensen's cells differs depending on their position in the cochlea; they appear as a single layer of cells in the basal coil and have a cuboidal form in the apical surface. [3] They contain nuclei and microvilli but are limiting of plasma membrane, they are also lack of endoplasmic reticulum and have few mitochondria . [ 4 ]
The cochlear cupula is a structure in the cochlea.It is the apex of the cochlea. The bony canal of the cochlea takes two and three-quarter turns around the modiolus.The modiolus is about 35 mm in length, and diminishes gradually in diameter from the base to the summit, where it terminates in the cupula.