| Maturation of auditory function related to hearing threshold estimations using the auditory brainstem response during infancy. | |
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MedLine Citation:
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PMID: 21129787 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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OBJECTIVE: The objective of this study was to quantify the maturation of the Auditory Brainstem Response (ABR) at discrete periods during infancy and to provide a means to appropriately estimate hearing thresholds when the ABR is immature. METHODS: A longitudinal study was designed to measure the in situ ABR thresholds of infants using air-conduction tone bursts of 500, 2000 and 4000Hz. Thresholds were measured using an eardrum-level microphone to eliminate the bias related to coupler-referenced scales such as the dB nHL scale used for adult assessments. RESULTS: The study found that the in situ thresholds of a sample of normally developing infants decreased significantly during the first 6 months of life. A comparison of these in situ thresholds with those of normal-hearing adults revealed that the ABR response reached maturity in these infants between 4 and 6 months of age for the frequencies 500 and 2000Hz but remained immature, or elevated, at 6 months of age for 4000Hz. CONCLUSIONS: The maturation of the ABR should be considered during the estimation of an infant's audiogram and subsequent diagnosis. |
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Authors:
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Andre M Marcoux |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-12-03 |
Journal Detail:
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Title: International journal of pediatric otorhinolaryngology Volume: 75 ISSN: 1872-8464 ISO Abbreviation: Int. J. Pediatr. Otorhinolaryngol. Publication Date: 2011 Feb |
Date Detail:
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Created Date: 2011-01-11 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8003603 Medline TA: Int J Pediatr Otorhinolaryngol Country: Ireland |
Other Details:
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Languages: eng Pagination: 163-70 Citation Subset: IM |
Copyright Information:
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Copyright © 2010 Elsevier Ireland Ltd. All rights reserved. |
Affiliation:
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Department of Audiology and Speech Language Pathology, University of Ottawa, 451 Smyth Rd., Ottawa, Ontario, K1H 8M5, Canada. amarcoux@uottawa.ca |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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