The surgical diseases of the ear / by Prof. von Troltsch. The mechanism of the ossicles and the membrana tympani / by Prof. Helmholtz ; translated from the German by James Hinton.

  • Tröltsch, Anton Friedrich, Freiherr von, 1829-1890.
Date:
1874
Catalogue details

Licence: Public Domain Mark

Credit: The surgical diseases of the ear / by Prof. von Troltsch. The mechanism of the ossicles and the membrana tympani / by Prof. Helmholtz ; translated from the German by James Hinton. Source: Wellcome Collection.

Provider: This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.

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    The second downward prolongation of the anterior ligamentum is a- small fold with a free border which descends to the lower edge of I, and, enwrapping this process, descends somewhat along the contour line of the bone in fig. 4 as far as the tendon of the tensor tympani, i.e. to the point where the dotted line from b cuts the contour of the bone. The last-mentioned fold bounds the anterior pocket towards the tympanum. The line just described, of ligaments and folds of mucous membrane, runs from h in fig. 4 to cp all along the contour line of the bone. Erom it, precisely at d, where it is strongest and shortest, there starts a second ligament, which I will call the ligamentum mallei externum. This springs from the malleus, from d, along a pronounced ridge <)f bone which runs to c, fig. 4. On the other side it is attached to the sharp edge of Eivini's recess, while posteriorly it follows the line of attachment of the posterior pocket of the membrane. (In fig. i it runs along the contour from/to c). This ligament^consists of a multitude of distinct satiny fibres which radiate from the short crest of the malleus between d and c to a much broader and more curved line of attachment on the temporal, bone. Pig. 5. Ch.T In fig. 5 this series of bands is represented, as seen from above e.g. in its line of attachment to the temporal hone. In this prepara- o-iven a different description of the pocket of the membrane. According to him the space over the short process forms an upper pocket separated by a partition wall from the posterior one. I have never been able to find it. The supposed opening of this pocket leads upwards over the liead of tlie malleus to the space over the ligamentum mallei externum, and so no more to- the membrane.