middle ear


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Related to middle ear: outer ear, inner ear, Middle ear infection

middle ear

the sound-conducting part of the ear, containing the malleus, incus, and stapes

Middle Ear

 

in man and other terrestrial vertebrates, the part of the auditory system located between the external ear and the internal ear. The middle ear includes the air-filled tympanic cavity, which contains auditory ossicles and the auditory, or eusta-chian, tube. In man and some primates, it also includes mastoid cells. In most vertebrates, it is bounded on the outside by the tympanic membrane. The middle ear is separated from the internal ear by the cartilaginous or bony wall of the vestibule of the labyrinth. The auditory ossicles transmit sound vibrations from the tympanic membrane to the internal ear. In most animals, the middle ear is connected to the pharynx by the auditory tube. In many terrestrial vertebrates and especially in mammals it contains many additional structures that perform important acoustic functions. The middle ear is partly or completely reduced in many terrestrial and secondarily aquatic amphibians, in many mammals, and in some turtles and snakes.

middle ear

[′mid·əl ′ir]
(anatomy)
The middle portion of the ear in higher vertebrates; in mammals it contains three ossicles and is separated from the external ear by the tympanic membrane and from the inner ear by the oval and round windows.
References in periodicals archive ?
A total of 49 patients with middle ear CG received surgical treatment between March 2008 and November 2015 in the Department of Otolaryngology, Sun Yat-Sen Memorial Hospital.
We retrospectively selected 7 representative cases of middle ear tumors that were treated at the Columbia University Medical Center in 2013 and 2014.
The endoscopic anatomy of middle ear was so clear and vision was so wide and extensive that anatomical structures was clearly visualised with minimal dissection.
The Eustachian tubes are a pair of narrow tubes that run from each middle ear to high in the back of the throat, behind the nasal passages.
NERVE DEAFNESS In nerve deafness the outer and middle ears work well, but the hearing organ in the inner ear is faulty, possibly due to prolonged exposure to loud noise, Meniere's disease and to some viral infections and drugs.
The diagnosis of cholesteatoma is based on clinical evaluation (otoscopy), where retraction of the tympanic membrane with pars flaccida perforation and a whitish mass in the middle ear are observed11.
In the presence of an intact middle ear system, we support the notion that the degree of hearing loss is affected only by the size of the TM perforation (more hearing loss with bigger perforation size) and middle ear volume (more hearing loss with smaller middle ear volume).
The most accurate studies on middle ear infection (AOM) involve tympanocentesis (removing some of the fluid from the ear chamber and testing it).
Middle Ear infections: After having a runny nose for a few days, your child complaints of ear pain, here is what has happened: The tube connecting the ear with the nose and throat is blocked from the excessive secretions.
The specificity of a high reading is remarkable at around 95%, so a high reading is a big reassurance that middle ear effusion is absent.
The mammalian middle ear catches sound and transfers it using three tiny bones--the hammer, anvil and stirrup--a trait that distinguishes mammals from other lineages.
Dubbed 'Operation Omakutsi, being the Oshiwambo word for ears the project aims to improve or even restore the hearing of patients who suffer from chronic middle ear infections.