The diseases of the ear : their nature, diagnosis, and treatment / by Joseph Toynbee ; with a supplement by James Hinton.

  • Toynbee, Joseph, 1815-1866.
Date:
1874
Catalogue details

Licence: Public Domain Mark

Credit: The diseases of the ear : their nature, diagnosis, and treatment / by Joseph Toynbee ; with a supplement by James Hinton. 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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    CHAPTER XVIII. ON THE DEAF AND DUMB. DISEASES PRODUCING DEAF-MUTISM THE CONDITION OF THE EARS IN THE DEAF AND DUMB, AS ASCERTAINED BY EXAMINATION DURING LIFE THE CON- DITION OF THE EAR IN THE DEAF AND DUMB, AS REVEALED BY DISSECTION THE MODE OF EXAMINING A CHILD SUPPOSED TO BE DEAF AND DUMB ON THE MEDICAL TREATMENT OF THE EARS OF THE DEAF AND DUMB—THE AMOUNT OF HEARING POSSESSED BY CHILDREN USUALLY ACCOUNTED DEAF AND DUMB ON THE EDUCATION OF THE DEAF AND DUMB ; WITH CASES. The number of deaf-mute children examined, and from whom the facts in this chapter were obtained, amounted to 411. Of these, 313 were congenital cases, and 9£ were the effect of different diseases acquired subsequent to birth. 1. THE DISEASES PRODUCING DEAF-MUTISM. On the causes producing congenital deaf-mutism I am unable to offer a decided opinion ; but the results of dissection, as de- tailed in a subsequent part of this chapter, show that the nervous apparatus is very frequently affected. If regard be also paid to the other cases I shall refer to, and the non- appearance of an efficient cause of any other kind, together with the analogy to be drawn from the cases in the chapter on Nervous Deafness, it would be no very violent assumption to suppose that early derangement of the nervous apparatus is at the root of most of the instances of deaf-mutism. Of the causes of acquired deaf-mutism a more accurate esti- mate may be formed. Thus in the 98 cases of acquired deafness the causes were as follows :— Scarlet fever . . . .36 Fever ..... 23 Measles ..... 4 Various diseases, as teething, convulsions, hydroce- phalus, a fall, fits, a fright, &c . . 35 « 98