A Text-book of the diseases of the ear and adjacent organs / by Dr. Adam Politzer ; translated and edited by James Patterson Cassells.

  • Politzer, Adam, 1835-1920.
Date:
1883
Catalogue details

Licence: Public Domain Mark

Credit: A Text-book of the diseases of the ear and adjacent organs / by Dr. Adam Politzer ; translated and edited by James Patterson Cassells. Source: Wellcome Collection.

Provider: This material has been provided by the Harvey Cushing/John Hay Whitney Medical Library at Yale University, through the Medical Heritage Library. The original may be consulted at the Harvey Cushing/John Hay Whitney Medical Library at Yale University.

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    In what degree the sound-conducting apparatus of the human ear possesses the property of receiving and of transmitting to the labyrinth the vibrations of bodies, so different in their quality, will be seen from the special description of the anatomical and physiological relations of the separate parts of the organ of hearing. According to the above observations, the organ of hearing is divided into two principal parts, the sound-conducting and the sound-perceiving portions. As this classification is the only correct one from the pathological standpoint, we will adhere to it for the future, especially as the older anatomical divisions into outer, middle, and inner ear can be reconciled with it. After dividing the organ of hearing, then, into two principal parts, as mentioned above, a further division takes place as follows : 1. The sound-conducting apparatus, in : a. The external ear (auricle and external meatus). b. The middle ear (the tympanic cavity with membrana tympani and ossicula, Eustachian tube and mastoid process). 2. The sound-perceiving apparatus, the so-called internal ear, divided into : a. The origin of the auditory nerve in the brain. b. The trunk of the auditory nerve. c. Its expansion in the labyrinth. After this division of the organ of hearing we will pass on to the special description of the anatomico-physiological relations of the human ear. As, however, the purpose of our observations is the knowledge and treatment of the disturbances of hearing, we will not confine ourselves to a simple description of the anatomical facts, but will put prominently fonvard the relations that exist between the organ of hearing in its normal state, and the pathological alterations of the tissues which impair its functions.