In 1925, Drury2 showed that in cases in which anatomic defects or concrete pathologic changes could be eliminated the level of aural acuity as measured by audiometric devices was an index of the nutritional level of the individual. Little attention was paid to this statement. It was again brought to my attention in "Vital Function Studies," by Rowe and Drury.3 This is the most important generalization relative to deafness of constitutional origin that has yet been uttered. Taking due cognizance of the importance of this dictum, the related data in the literature and the accumulated material at hand, the etiology of this condition may be set forth as follows:
Hepatic and Pancreatic
Heredity.—Practically all of the literature on the subject of heredity is based on the assumption that the cases with which the authors dealt
GOTTLIEB MJ. CONSTITUTIONAL DEAFNESS. Arch Otolaryngol. 1932;16(6):814–828. doi:10.1001/archotol.1932.00630040829005
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