EFFECTS OF THE NORMAL AGING PROCESS AND SEX DIFFERENCES ON THE EVALUATION OF AUDIOLOGIC BRAINSTEM RESPONSES.
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Title
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EFFECTS OF THE NORMAL AGING PROCESS AND SEX DIFFERENCES ON THE EVALUATION OF AUDIOLOGIC BRAINSTEM RESPONSES.
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Identifier
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AAI8601674
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identifier
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8601674
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Creator
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MALINOFF, ROCHELLE LEE.
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Contributor
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Michael B. Seitz
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Date
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1985
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Language
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English
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Publisher
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City University of New York.
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Subject
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Health Sciences, Audiology | Gerontology
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Abstract
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The objective of this study was to determine the changes and variations in BSER wave morphology which are associated with aging and with differences between the sexes. In particular, the study was undertaken to determine the effects of the normal aging process of males and females on the BSER as measured by absolute and interpeak latencies of waves I('+) through V('-), the amplitude ratios of wave V:I and general morphological patterns. Accordingly, 80 healthy men and women (40 of each) with normal hearing and falling into four age groups--18-34, 55-64, 65-74 and 75-82 were chosen as subjects for the study. All subjects were tested at 80, 60, 40, and 20 dB SL using ipsilateral, contralateral, and horizontal recording montages whenever possible.;Results of the study indicate a general increase in absolute latencies with age through the first three age groups. IPLs also increased with age when recording at 80 and 60 db SL, but showed a decrease in transmission time at 40 dB SL. The relative amplitude of waves I and V decreases significantly with aging, although no effect was found on the amplitude ratios of waves V:I at any sensation level or montage.;Female subjects were found to have shorter absolute and interpeak latencies than males. The differences between male and female absolute latencies did not usually become significant however (at p < .05) until the later waves (III, IV, and V('+)).;The results of the study indicate statistically significant effects of the aging process, and of differences between the sexes, on the normal variations of the BSER. The study clearly establishes the importance of accounting for the age and sex of subjects as a precondition for establishing normality and abnormality criteria for the interpretation of BSER in a clinical environment.
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Type
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dissertation
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Source
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PQT Legacy CUNY.xlsx
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degree
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Ph.D.
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Program
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Speech & Hearing
