A text-book of the diseases of the ear and adjacent organs . Fig. 122.—Niche of the Fenestra Ovalis, with the of the Stapes inthe Normal Ear of an Adult. Network of Bands extending from the Neckof the Stapes to the Walls of the Niche. c, Head of the stapes ; ss, Cruree of the stapes. numerous membranous striae and bands, which often cross each other, andby which the membrana tympani, the ossicula, and the tensor tendon, areabnormally connected with each other and with the walls of the tympanum,producing abnormally increased tension of the sound-conducting apparatus. Fig. 123.—Cross Sect
A text-book of the diseases of the ear and adjacent organs . Fig. 122.—Niche of the Fenestra Ovalis, with the of the Stapes inthe Normal Ear of an Adult. Network of Bands extending from the Neckof the Stapes to the Walls of the Niche. c, Head of the stapes ; ss, Cruree of the stapes. numerous membranous striae and bands, which often cross each other, andby which the membrana tympani, the ossicula, and the tensor tendon, areabnormally connected with each other and with the walls of the tympanum,producing abnormally increased tension of the sound-conducting apparatus. Fig. 123.—Cross Section through the Niche of the Fenestra Ovalis andthrough both of the stapes in a normal ear. s, Section of the posterior free crura of the stapes ; .$, Section of a bridge of mucousmembrane, with the anterior crura adherent to the wall of the niche. with deafness of different degrees. These bands cannot be considered asprimary pathological formations, but as thickened bands and folds which areso often met with in the normal ear as residue of the fcetal mucous membranecushion (Fig. 122). In some rare cases such striae are transformed by a * Steinbriigge, Pathologitche Anatomie dta Ohres, in Zieglers Patholog. Anatomie,1890. 278 THE CATARRHAL ADHESIVE PROCESSES IN THE MIDDLE EAR. deposit of calcareous salts into bone-like processes (Toynbee, v. Troltsch).We further find circumscribed or extensive adhesions between the membranatympani and the inner wall of the tympanic cavity, and sometimes a partialor complete obliteration of the attic of the whole cavum tymp
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Keywords: ., bookcentury1800, bookdecade1890, booksubjecteardiseases, bookyear
