STRUCTURE AND FUNCTION OF THE LAMINA PROPRIA OF THE TYMPANIC MEMBRANE IN VARIOUS MAMMALS
- 1 February 1951
- journal article
- research article
- Published by American Medical Association (AMA) in JAMA Otolaryngology–Head & Neck Surgery
- Vol. 53 (2) , 170-181
- https://doi.org/10.1001/archotol.1951.03750020044006
Abstract
IT WAS shown by Fumagalli1 that in man the bundles of collagenous fibers making up the lamina propria of the tympanic membrane are disposed in such a way that their tension does not change with increasing or decreasing tension of the tympanic membrane itself. Investigations on man (Leonardelli,2 Fumagalli,1b Filogamo3) have demonstrated, on the cone of radial bundles, a system of bundles (parabolic bundles) originating from the short process of the malleus. They fan out anteriorly and posteriorly, ending in the fibrous ring. They pass, stringlike, under the arch of the crescentic bundle. These two, the parabolic bundles and the crescentic bundle, form a morphological and functional unit, called by Fumagallilb the "paraboliccrescentic system." The fibers of this system relax when the long process of the malleus moves in the direction of the middle ear (stretching of the radial bundles) and extend when the handle ofKeywords
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