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tympanic membrane

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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

tympanic membrane

[tim′pan·ik ′mem‚brān]
(anatomy)
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.
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 It might be outdated or ideologically biased.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).

G. N. SIMKIN

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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References in periodicals archive
Using 'Image J' [version 1.35j of Wayne Rasband, National Institute of Health U.S.A.] geometrical package, the area of perforation (P) and the entire area of the tympanic membrane (T) were calculated.
(2.) Showed isolated tympanic membrane perforation and normal middle ear structure in their first otoendoscopic examination;
Conclusion: Traumatic tympanic membrane perforation is common in young male.
Tympanic thermometers are safe, straightforward, and convenient, but questions persist concerning accuracy (Edelu, Ojinnaka, & Ikefuna, 2011).
In this study, we assessed the effects of PRP together with fat grafts in the repair of tympanic membrane perforations and on healing of the tympanic membrane in a rat model.
Temperatures were taken from axilla and tympanic sites on arrival and at subsequent 15 minute intervals until discharge, without researcher manipulation.
Nevertheless, employing Cartilage Tympanoplasty in repairing the anterior perforation of tympanic membrane led to the overall success rate 96.9% to 98.4% [14].
Accumulated bacteria and debris in horizontal ear canal can eventually access tympanic cavity.
Twelve (30%) patients had large size, 24(60%) medium size, one (2.5%) pin hole size and 3(7.5%) had subtotal tympanic membrane perforation.
The investigation of Tympanic Membrane (TM) mechanics is important for understanding the acoustical and mechanical properties of the sound-path from the ear to the cochlea.
Tympanic membrane perforation: size, site and hearing evaluation.
In the embryo, the temporal bone consists of five separate sections: periodic, squamous, tympanic, stylohyal, and tympanohyal.
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