Peculiarities of the deaf and dumb, as regards medical treatment, and their idiocyncrasies [i.e. idiosyncrasies], which have been observed at the Ulster Institution / by Henry Samuel Purdon.

  • Purdon, Henry Samuel.
Date:
1865
Catalogue details

Licence: Public Domain Mark

Credit: Peculiarities of the deaf and dumb, as regards medical treatment, and their idiocyncrasies [i.e. idiosyncrasies], which have been observed at the Ulster Institution / by Henry Samuel Purdon. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    Meatus ] Externus.j Membrana Tympani. Tympanum. Labyrinth. Nerve. Name of Observer. Healthy. Healthy. Healthy. The Superior and Posterior semi-circular canals incom- plete in right ear. Healthy. Toynbee. Do. Do. Do. The Superior incomplete in left ear, mem- branous semi- circular canals aosen I. Do, Do. Do. Do. Do. Healthy. Do. Do. Do. Destroyed. Mucous mem- Lamina Spiralis Otoconie Do. brane thick. near the vesti- bule filling the scala tympani. obstruct- ing the canal. CHAPTER IV. MORBID STATES OF THE EAR, CONGENITAL, OR ACQUIRED, WHICH HAVE BEEN OBSERVED IN DEAF AND DUMB PERSONS. Frequently a deposition of tubercles, are found in the tympanum, and mastoid cells by post-moi-tem examination shewing a strumous diathesis. The membrane lining the fenestra rotunda is sometimes ossified, or thickened, and the cochlea improperly developed. ' Schallgruber has remarked in a few cases, the vestibule more contracted, and smaller than natural. The semi-circular canals are usually defective in mutes, they may be either smaller, contracted, incomplete, filled with caseous matter, terminating in a cul-de-sac, or absent. The aqueducts are often larger than natural. Saissy mentions a rather curious case, in his Essai sur les maladies de I'oreille Interne, of the total absence of the Labyrinth in a young child, which died in the Charite at Lyons of fever. The membrana tympani was normal; but the ossicles were absent,