A study on the lateralization of the effect of musical imagery on spontaneous otoacoustic emissions

Ramos Amézquita, Alejandro and Pérez-Acosta, Gabriela and Castro-Sierra, Eduardo (2007). A study on the lateralization of the effect of musical imagery on spontaneous otoacoustic emissions. "ICTUS", v. 8 (n. 1); pp. 65-75. ISSN 2238-6599.

Description

Title: A study on the lateralization of the effect of musical imagery on spontaneous otoacoustic emissions
Author/s:
  • Ramos Amézquita, Alejandro
  • Pérez-Acosta, Gabriela
  • Castro-Sierra, Eduardo
Item Type: Article
Título de Revista/Publicación: ICTUS
Date: 2007
ISSN: 2238-6599
Volume: 8
Subjects:
Faculty: E.T.S.I. Industriales (UPM)
Department: Otro
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

It has been suggested that different pathways through the brain are followed depending on the type of information that is being processed. Although it is now known that there is a continuous exchange of information through both hemispheres, language is considered to be processed by the left hemisphere, where Broca?s and Wernicke?s areas are located. On the other hand, music is thought to be processed mainly by the right hemisphere. According to Sininger Y.S. & Cone- Wesson, B. (2004), there is a similar but contralateral specialization of the human ears; due to the fact that auditory pathways cross-over at the brainstem. A previous study showed an effect of musical imagery on spontaneous otoacoustic emissions (SOAEs) (Perez-Acosta and Ramos-Amezquita, 2006), providing evidence of an efferent influence from the auditory cortex on the basilar membrane. Based on these results, the present work is a comparative study between left and right ears of a population of eight musicians that presented SOAEs. A familiar musical tune was chosen, and the subjects were trained in the task of evoking it after having heard it. Samples of ear-canal signals were obtained and processed in order to extract frequency and amplitude data on the SOAEs. This procedure was carried out before, during and after the musical image creation task. Results were then analyzed to compare the difference between SOAE responses of left and right ears. A clear asymmetrical SOAEs response to musical imagery tasks between left and right ears was obtained. Significant changes of SOAE amplitude related to musical imagery tasks were only observed on the right ear of the subjects. These results may suggest a predominant left hemisphere activity related to a melodic image creation task.

More information

Item ID: 34694
DC Identifier: http://oa.upm.es/34694/
OAI Identifier: oai:oa.upm.es:34694
Official URL: http://www.ictus.ufba.br/index.php/ictus/article/view/138
Deposited by: Memoria Investigacion
Deposited on: 15 Feb 2016 08:47
Last Modified: 15 Feb 2016 08:47
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