middle ear


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.
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 ?
Middle Ear Implants Market is growing at a CAGR of 10.3% from 2017 to 2026
The basal middle ear pressure value was -33.56[+ or -]39.66 daPa in the affected side (Group 1), and -29.24[+ or -]44.42 daPa at the contralateral side (Group 2).
When fluid collects in the middle ear but is not infected, this is known as otitis media with effusion, which means fluid.
Surgery is primarily used for the management of inverted papilloma of the middle ear and mastoid cavity.
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.
Diagnosis of cancer in the middle ear and the mastoid process is seldom made early; this can contribute to the unique anatomy of middle ear and the fact that many benign pathologies such as otitis media and its complications share similar clinical presentations; most commonly reported symptoms include otorrhea, otalgia, aural fullness, tinnitus, and hearing loss [5].
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.
The influence of middle ear volume on the degree of hearing loss is also expected.
Middle ear implants use a magnet to vibrate structures in the middle ear.