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Principles and clinical applications of auditory evoked potentials in the geriatric population
1Program in Cognition and Neuroscience, The University of Texas at Dallas, 2612 Prairie Creek Drive East, Richardson, TX 75080-2679, USA. jjerger@utdallas.edu
Abstract:
Age-related changes in auditory evoked potentials are complex and complicated by the confounding effects of gender; concomitant high-frequency hearing sensitivity loss; and, in the case of event-related responses, the nature of the task used to elicit the response. There is a tendency for amplitude to decline and latency to increase, but these trends are not always clear-cut. There is also a tendency for activation patterns to move forward from parietal to frontal areas as age increases. The dichotic listening tool has revealed age-related changes in interaural and interhemispheric asymmetries. These asymmetries seem to be related to loss in the efficiency of interhemispheric transfer via the corpus callosum.
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