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This volume is composed of two sections. The first, by Dr. M. Schwarz, deals with hereditary deafness, while the second, by Dr. Hellmut Eckhardt, discusses various anomalies of development of the skeleton and extremities.
In the first half of his monograph, Dr. Schwarz considers such general factors as the embryology and anatomy of the ear. He outlines the physiology of the internal ear, both from the vestibular and the cochlear standpoints. In addition, he describes the various hearing and labyrinthine tests and the relative significance of each.
The second half of the monograph deals exclusively with the problem of deafness, both hereditary and acquired. All current theories on the relative influence of the present known factors are cited and discussed in great detail. A number of cases are reported wherein deafness has been traced back for several generations, and the author is able to show both from his own work
The Handbook of Hereditary Diseases,. Arch Otolaryngol. 1941;33(3):507. doi:10.1001/archotol.1941.00660030513016
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