Lateralization of music and language imagery and spontaneous otoacoustic emission production.
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1
HIMFG/ENM-UNAM, LPAFA, Mexico
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2
ENM-UNAM, Mexico
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3
LC-FC-UNAM, Mexico
Although there is a continuous exchange of information through both sides, 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 considered to be processed mainly by the right hemisphere. There appears to be a contralateral specialization of the human ears due to the fact that auditory pathways cross at the brainstem. A previous study [1, 2] showed an effect of musical imagery on spontaneous otoacoustic emissions (SOAEs) providing evidence of an efferent influence from the auditory cortex on the basilar membrane. The present work is a comparative study between right and left ears of a population of eight musicians presenting 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 right and left ears. A clear asymmetrical SOAE response to musical imagery tasks between left and right ears was obtained. Significant changes of SOAE amplitude related to musical imagery taks were only obtained in the right ear of subjects. These results suggest a predominantly left hemisphere activity related to a melodic image creation task. Experiments are now in progress to determine whether a similar effect is found regarding language imagery and SOAE production.
References
1. Pérez-Acosta 2006. Perspectiva Interdisciplinaria de Música 1,57-60.
2. Ramos-Amézquita et al. 2007. Ictus Especial III SIMCAM,65-75.
Conference:
41st European Brain and Behaviour Society Meeting, Rhodes Island, Greece, 13 Sep - 18 Sep, 2009.
Presentation Type:
Poster Presentation
Topic:
Poster presentations
Citation:
Castro-Sierra
E,
Perez-Acosta
G and
Ramos-Amezquita
A
(2009). Lateralization of music and language imagery and spontaneous otoacoustic emission production..
Conference Abstract:
41st European Brain and Behaviour Society Meeting.
doi: 10.3389/conf.neuro.08.2009.09.107
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Received:
08 Jun 2009;
Published Online:
08 Jun 2009.
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Correspondence:
Eduardo Castro-Sierra, HIMFG/ENM-UNAM, LPAFA, Mexico City, Mexico, eduardcs@yahoo.com.mx