tympanic membrane

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Related to tympanic membrane: Tympanic membrane perforation

tympanic membrane

the thin translucent oval membrane separating the external ear from the middle ear. It transmits vibrations produced by sound waves, via the ossicles, to the cochlea
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Tympanic Membrane


eardrum, a thin layer of connective tissue and epithelium covering the opening of the tympanic cavity in the ear of terrestrial vertebrates and man. The tympanic membrane is absent in caudate and legless amphibians and burrowing snakes. Sound waves on striking the membrane cause it to vibrate. The vibrations are then transmitted to the inner ear mostly by the auditory ossicles. The membrane is divided into three concentric zones in mammals and man because of the uneven action of forces on some of its parts: medial (which moves without becoming deformed), intermediate (the most delicate and strongly vibrated), and lateral (hinged, movable).


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

tympanic membrane

[tim′pan·ik ′mem‚brān]
The membrane separating the external from the middle ear. Also known as eardrum; tympanum.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
There is no relation of duration of symptoms with either size or site of tympanic membrane perforation in chronic otitis media.
Perforation of the tympanic membrane (TM) due to trauma is a common occurrence across the globe due to human violence.
In total, postoperative tympanic membrane perforation was found in 10.0% of patients in the control group and 13.3% in case group with no significant difference (P = 0.500).
The graft may be placed on outer surface (on-lay) or inner surface (underlay) of the tympanic membrane. In the underlay technique the graft is supported by gel foam in the middle ear.
Due to the above mentioned reasons, tympanic membrane was investigated in these ways:
As I read and reread the headline, I kept asking myself, "What did the key used to be?" I always thought that I was supposed to he looking at the tympanic membranes to make a diagnosis of AOM.
Middle ear is a closed gas containing space and pressures as low as 5 psi can rupture the tympanic membrane, with higher pressures even ossicular chain can be damaged.
Core body temperature measurement: a comparison of axilla, tympanic membrane and pulmonary artery blood temperature.
* The size of the lumen of the VT and the length of the tube are the two main factors that increase the length of 'stay' of a VT in the tympanic membrane. These two factors will also make it more probable that the VT forms a persistent perforation of the tympanic membrane.
Look for mobility, position, and appearance when assessing the tympanic membrane, because all three should factor into the diagnosis of AOM.
Surgical success was defined as an intact tympanic membrane after at least 2 years.