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The cochlea is a portion of the inner ear that looks like a snail shell (cochlea is Greek for snail). [5] The cochlea receives sound in the form of vibrations, which cause the stereocilia to move. The stereocilia then convert these vibrations into nerve impulses which are taken up to the brain to be interpreted.
Tonotopy in the auditory system begins at the cochlea, the small snail-like structure in the inner ear that sends information about sound to the brain. Different regions of the basilar membrane in the organ of Corti , the sound-sensitive portion of the cochlea, vibrate at different sinusoidal frequencies due to variations in thickness and width ...
The olivocochlear system is a component of the auditory system involved with the descending control of the cochlea.Its nerve fibres, the olivocochlear bundle (OCB), form part of the vestibulocochlear nerve (VIIIth cranial nerve, also known as the auditory-vestibular nerve), and project from the superior olivary complex in the brainstem to the cochlea.
The cochlea propagates these mechanical signals as waves in the fluid and membranes and then converts them to nerve impulses which are transmitted to the brain. [4] The vestibular system is the region of the inner ear where the semicircular canals converge, close to the cochlea.
The cochlear duct is part of the cochlea. It is separated from the tympanic duct (scala tympani) by the basilar membrane. [2] It is separated from the vestibular duct (scala vestibuli) by the vestibular membrane (Reissner's membrane). [2] The stria vascularis is located in the wall of the cochlear duct. [2]
The plan view of the human cochlea (typical of all mammalian and most vertebrates) shows where specific frequencies occur along its length. The frequency is an approximately exponential function of the length of the cochlea within the Organ of Corti. In some species, such as bats and dolphins, the relationship is expanded in specific areas to ...
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.
The cochlear nerve carries auditory sensory information from the cochlea of the inner ear directly to the brain. The other portion of the vestibulocochlear nerve is the vestibular nerve, which carries spatial orientation information to the brain from the semicircular canals, also known as semicircular ducts. [1]