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Inner ear
The cochlea and vestibule, viewed from above. The cochlea is the auditory portion of the Inner ear. Its core component is the Organ of Corti, the sensory organ of hearing, which is distributed along "Vestibulum" and "vestibule" redirect here For other uses see Vestibule (disambiguation.
Latin auris interna
Gray's subject #232 1047
Artery labyrinthine artery
MeSH Inner+ear
Inner ear
Inner ear

The inner ear is the bony labyrinth, a system of passages comprising two main functional parts:

Inner ears are found in all vertebrates, with substantial variations in the form and function of their sensory organs. Each animal has two inner ears, one on each side of its head.

Contents

Ear overview, in context

In mammals, the outer ear focuses and directs sound waves into the middle ear. The outer ear is the external portion of the Ear, which consists of the pinna, Concha, and Auditory meatus. In the middle ear, the energy of these pressure waves[1] is translated into mechanical vibrations of the middle ear’s bone structure. The middle ear is the portion of the ear internal to the Eardrum, and external to the Oval window of the Cochlea. P-wave can also refer to a type of electronic wavefunction in atomic physics see Atomic orbital. The cochlea of the inner ear propagates these mechanical signals as waves in fluid and membranes, and finally transduces them to nerve impulses which are transmitted to the brain.

The vestibular system of the inner ear is responsible for the sensations of balance and motion. The vestibular system, which is a contributor to our balance system and our sense of spatial orientation is the sensory system that provides the dominant input about movement and It uses the same kinds of fluids and detection cells (hair cells) as the cochlea uses, and sends information to the brain about the attitude, rotation, and linear motion of the head. Hair cells are the Sensory receptors of both the Auditory system and the Vestibular system in all Vertebrates. The type of motion or attitude detected by a hair cell depends on its associated mechanical structures, such as the curved tube of a semicircular canal or the calcium carbonate crystals (otolith) of the saccule and utricle. An otolith, (οτο- oto-, ear + λιθος lithos, a stone also called statoconium or otoconium is a structure in the Saccule Introduction The saccule is a bed of sensory cells situated in the inner ear The utricle, or utriculus along with the Saccule is one of the two Otolith organs located in the Vertebrate Inner ear.

The inner ear is innervated by the eighth cranial nerve in all vertebrates. Cranial nerves are Nerves that emerge directly from the Brain stem in contrast to Spinal nerves which emerge from segments of the Spinal cord.

Non-humans

Birds have an auditory system similar to that of mammals, including an outer ear, middle ear, and cochlea, though their middle ear has only one bone compared to the three bones in mammals. Reptiles, amphibians, and fish do not have cochleas but hear with simpler auditory organs or vestibular organs, which generally detect lower-frequency sounds than the cochlea.

References

  1. ^ Sound is a Pressure Wave

See also

External links

For more uses of the word labyrinth, see Labyrinth (disambiguation The labyrinth is a System of fluid passages in the The vestibular system, which is a contributor to our balance system and our sense of spatial orientation is the sensory system that provides the dominant input about movement and The cochlea is the auditory portion of the Inner ear. Its core component is the Organ of Corti, the sensory organ of hearing, which is distributed along The State University of New York Health Science Center at Brooklyn, better known as SUNY Downstate Medical Center, is an academic medical center and is the only one of its kind

Dictionary

inner ear

-noun

  1. (anatomy) The portion of the ear located within the temporal bone which includes the semicircular canals, vestibule, and cochlea and is responsible for hearing and balance.
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