A practical treatise on the diseases of the ear : including the anatomy of the organ / by D.B. St. John Roosa.

  • Roosa, D. B. St. John (Daniel Bennett St. John), 1838-1908.
Date:
1880
Catalogue details

Licence: Public Domain Mark

Credit: A practical treatise on the diseases of the ear : including the anatomy of the organ / by D.B. St. John Roosa. Source: Wellcome Collection.

Provider: This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.

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    nold, Sclilemn, Johannes Mutter, Breschet, Bonnafont, and Toynbee. 1851] Toynbee* investigated anew the membrana tympani. He especially added to our knowledge in regard to the fibrous layer, and described, for the first time, the dermoid layer. This paper was published in the Philosophical Trans- actions. It was preceded by papers in the Medico-Chirur- gical Transactions, on the pathological anatomy of the ear, papers which have given Toynbee lasting fame, because they did very much to place otology upon as sound a basis in pathology as they had been placed in anatomy by the labors we have enumerated. Toynbee s statement, that the Eustachian tube was usually a closed canal, and that muscular action was required to open it, led to Politzer's method of inflating the ear, of the value of which procedure more will be said in our review of the pro- gress in therapeutics. 1856] Von Troltsch began a series of anatomical investiga- tions, which, we may hope, have not yet ended. His contributions relate to the structure of the membrana tympa- ni, the muscles of the Eustachian tube, and the pathological anatomy of the middle ear. He also, in the course of some investigations of the cavity of the tympanum of the foetus, found that it was filled with a proliferation of the mucous mem- brane of the labyrinth wall, which forms a mucous cushion, that rapidly lessens in size after birth. This anatomical fact explained the frequency of inflammations of the middle ear in young children. 1858] Gerlach f followed Toynbee in the investigation of the fibrous layer of the membrana tympani, and showed that in the extreme periphery the circular fibers were wanting. 1860] Magnus investigated anew the articulations of the ossicula, and showed that there was no real joint be- tween the malleus and incus. He also denied the voluntary or involuntary contraction of the tensor tympani muscle. 1862] Politzer and Lucas published the results of expert * Diseases of the Ear. American edition. f Schwartze, Archiv fur Ohrenheilkunde. Bd. I.