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Article
December 1955

Locus of the Lesion in Recruiting Ears

Author Affiliations

Ann Arbor, Mich.
From the Physiological Acoustics Laboratory, Institute of Industrial Health, University of Michigan. This study was undertaken in preparation for a doctoral dissertation under the supervision of Dr. Merle Lawrence and Dr. George Herman, of the University of Michigan, and was supported in part by the Research and Development Division, Office of the Surgeon General, Department of the Army, under Contract DA-49-007-MD-634.

AMA Arch Otolaryngol. 1955;62(6):625-631. doi:10.1001/archotol.1955.03830060057014
Abstract

The place of loudness recruitment testing in otological diagnosis has been recognized for more than 10 years. However, until recently, the diagnostic value of such tests was limited to the differentiation of conductive and perceptive types of hearing losses. The value of these procedures with respect to the further delineation of the anatomical locus of the lesion in perceptive losses was not realized.

With the recent publication of recruitment studies on abnormal ears of various types, the diagnostic value of recruitment testing was increased significantly. De Bruïne-Altes3 was one of the first to include enough varieties of verified causative classifications to make general delineating conclusions; however, there was still a need for data on persons with eighth nerve lesions. Dix, Hallpike, and Hood7 were among the first to supply such information and to call attention to the value of recruitment testing in differentiating cochlear and noncochlear lesions in

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