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September 1952


Author Affiliations


AMA Arch Otolaryngol. 1952;56(3):294-312. doi:10.1001/archotol.1952.00710020314008

SECONDI1 studied the structure of the membrana tympani in 10 specimens each of a number of animals, including dogs, cats, oxen, sheep, pigs, and horses. He compares his findings with those of Fumagalli in man. The latter stated 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. In man there has been demonstrated on the cone of radial bundles a system of parabolic bundles originating from the short process of the malleus. These fan out anteriorly and posteriorly from the short process of the malleus and end in the fibrous ring under the arch of a crescentic bundle. These two bundles Fumagalli named the parabolic-crescentic system. This system is in balance with the radial bundles. With different positions of