| Steady-state analysis of auditory evoked potentials over a wide range of stimulus repetition rates: Profile in adults. | |
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MedLine Citation:
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PMID: 21434788 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Abstract Objective: Quasi-steady-state responses were assessed over a wide range of stimulus repetition rates embracing well the traditionally measured transient AEPs (obligatory auditory evoked potentials of all latencies). Repetition rates of ≤10 Hz have received little attention in the context of the ASSR stimulus-response analysis approach which is speculated to provide technical advantages, if not additional information, over more traditional transient stimulus-response paradigms. Design: A measure introduced and defined as the sum of the response at the stimulus frequency and its harmonics. The magnitude of steady-state responses were measured at repetition rates from 0.75 to 80 Hz, using trains of repeated tone-burst stimuli. Study sample: Twenty-five normal-hearing adults. Results: Results show that the magnitudes of the response across repetition rates are largest at the two lowest rates, following trends expected from the transient AEP literature. Good reliability overall was observed for the harmonic sum. Conclusions: The analysis methods used in this paper may give information that will have application for clinical testing. Of pragmatic importance is that the rate profile could be determined without subjective wave identification and/or interpretation, and thus by a method that is inherently more objective than conventional AEP tests. Sumario Objetivo: Se evaluaron respuestas de cuasi-estado estable en un amplio rango de tasas de repetición del estímulo, que correspondían a los AEP tradicionalmente medidos (potenciales evocados auditivos obligatorios de todas las latencias). Las tasas de repetición de ≤10 Hz han recibido poca atención en el contexto del enfoque de análisis de estímulo-respuesta para ASSR, que se especula proporciona ventajas técnicas, además de información adicional, sobre paradigmas más tradicionales de estímulo-respuesta transitorios. Diseño: Una medida introducida y definida como la suma (armónica) de la respuesta, a la frecuencia de estímulo y de sus armónicos. La magnitud de las respuestas de estado estable fueron medidas a tasas de repetición de 0.75 a 80 Hz, usando series de estímulos de ráfagas tonales repetidas. Muestra del Estudio: Veinticinco adultos con audición normal. Resultados: Los resultados muestran que las magnitudes de las respuestas en las tasas de repetición son mayores en las dos tasas más bajas, siguiendo la tendencia esperada de la literatura de AEP transitorios. Se observó una buena confiabilidad para la suma armónica. Conclusiones: Los métodos de análisis usados en este trabajo pueden dar información que tendrá aplicaciones para evaluación clínica. De importancia pragmática es que el perfil de la tasa podría ser determinado sin identificación y/o interpretación subjetiva de ondas, y por tanto, por un método que es inherentemente más objetivo que las pruebas convencionales de AEP. |
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Authors:
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Abreena I Tlumak; John D Durrant; Rafael E Delgado; J Robert Boston |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-3-24 |
Journal Detail:
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Title: International journal of audiology Volume: - ISSN: 1708-8186 ISO Abbreviation: - Publication Date: 2011 Mar |
Date Detail:
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Created Date: 2011-3-25 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101140017 Medline TA: Int J Audiol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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*Department of Communication Science and Disorders, University of Pittsburgh, Pennsylvania, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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