middle ear

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middle ear

the tympanic cavity with the auditory ossicles contained in an irregular space in the temporal bone. It is separated from the external ear by the tympanic membrane and from the inner ear by the oval window. The auditory (eustachian) tube carries air from the posterior nasopharynx into the middle ear. Also called tympanic cavity. Compare external ear, internal ear.
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Middle ear

middle ear

The middle of the three parts of the ear, consisting of an air-filled cavity bound externally by the tympanic membrane and containing three ossicles that vibrate in response to sound waves, passing the amplified sound to the inner ear at the round window.

tym·pan·ic cav·i·ty

(tim-pan'ik kav'i-tē) [TA]
An air chamber in the temporal bone containing the ossicles; it is lined with mucous membrane and is continuous with the auditory tube anteriorly and the tympanic antrum and mastoid air cells posteriorly.

EAR

Abbreviation for estimated average requirement.

ear

(ēr) [TA]
The organ of hearing: composed of the external ear, which includes the auricle and the external acoustic, or auditory, meatus; the middle ear, or the tympanic cavity with its ossicles; and the internal ear or inner ear, or labyrinth, which includes the semicircular canals, vestibule, and cochlea.
See also: auricle
Synonym(s): auris [TA] .

middle ear

The narrow cleft within the temporal bone lying between the inside of the ear drum and the outer wall of the inner ear. The middle ear is lined with mucous membrane, contains the chain of three auditory OSSICLES and is drained into the back of the nose by the EUSTACHIAN TUBE. It is a common site of infection, which gains access by way of the tube. Middle ear infection is called OTITIS MEDIA. Also known as the tympanic cavity.

middle ear

see EAR.

Middle ear

The cavity or space between the eardrum and the inner ear. It includes the eardrum, the three little bones (hammer, anvil, and stirrup) that transmit sound to the inner ear, and the eustachian tube, which connects the inner ear to the nasopharynx (the back of the nose).

EAR

Abbreviation for estimated average requirement.

ear

(ēr) [TA]
Organ of hearing and equilibrium, composed of external ear,, consisting of auricle, external acoustic meatus, and tympanic membrane; middle ear,, or tympanic cavity, with its auditory ossicles and associated muscles; and internal ear,, the vestibulocochlear organ, which includes the bony labyrinth (of semicircular canals, vestibule, and cochlea), and vestibular and cochlear labyrinths.
Synonym(s): auris.

middle ear

see ear, otitis media.

middle ear cavity
cavity of the middle ear made up of the tympanic bulla and the epitympanic recess.
middle ear ossicles
see ossicle.
References in periodicals archive ?
There may be associated extension into the IAC or middle ear cavity.
During the past 40 years, a number of techniques have been proposed to allow surgeons to obtain better intraoperative visualization of middle ear cavity structures while preserving the posterior canal wall.
In 1967, Mer et al first described the use of fiberoptic endoscopes for viewing the middle ear cavity.
We conducted this study to test the hypothesis that ICWM with otoendoscopy provides equal or better visualization of middle ear cavity structures than does CWDM with microscopy alone.
Moreover, several authors have determined that the epitympanum, sinus tympani, and middle ear cavity are areas of high risk for recurrent disease.
Occasionally, an EACC extends into the middle ear cavity, facial nerve canal, mastoid cavity, or tegmen tympani.
8) One major safety concern is heat dissipation from the tip of the endoscope when a xenon light source is used; however, this risk can be obviated by using a Storz Cold Light Fountain Halogen 150W light source, which has a color temperature of approximately 3,400 K and can well illuminate the small middle ear cavity.
Patent tubes allow bacteria, viruses, and allergens to migrate into the middle ear cavity.
Other reported complications of tympanostomy tube placement include (1) tympanic membrane retraction, (2) postsurgical infection, (3) localized foreign-body reaction, (4) granulation, (5) hyalinization, (6) tympanosclerosis, (7) temporary or permanent hearing impairment of varying degrees, (8) persistent tympanic membrane perforation, (9) dislocation of the tube into the middle ear cavity, (10) tube blockage, and (11) cholesteatoma.
A bony defect in the base of the left petrous bone was also identified, and a soft-tissue density filled the middle ear cavity.
A soft-tissue density may be visible in the middle ear cavity with opacification of mastoid air cells.