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Encoding audio motion: spatial impairment in early blind individuals
The consequence of blindness on auditory spatial localization has been an interesting issue of research in the last decade providing mixed results. Enhanced auditory spatial skills in individuals with visual impairment have been reported by multiple studies, while some aspects of spatial hearing see...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Frontiers Media S.A.
2015
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4561343/ https://www.ncbi.nlm.nih.gov/pubmed/26441733 http://dx.doi.org/10.3389/fpsyg.2015.01357 |
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author | Finocchietti, Sara Cappagli, Giulia Gori, Monica |
author_facet | Finocchietti, Sara Cappagli, Giulia Gori, Monica |
author_sort | Finocchietti, Sara |
collection | PubMed |
description | The consequence of blindness on auditory spatial localization has been an interesting issue of research in the last decade providing mixed results. Enhanced auditory spatial skills in individuals with visual impairment have been reported by multiple studies, while some aspects of spatial hearing seem to be impaired in the absence of vision. In this study, the ability to encode the trajectory of a 2-dimensional sound motion, reproducing the complete movement, and reaching the correct end-point sound position, is evaluated in 12 early blind (EB) individuals, 8 late blind (LB) individuals, and 20 age-matched sighted blindfolded controls. EB individuals correctly determine the direction of the sound motion on the horizontal axis, but show a clear deficit in encoding the sound motion in the lower side of the plane. On the contrary, LB individuals and blindfolded controls perform much better with no deficit in the lower side of the plane. In fact the mean localization error resulted 271 ± 10 mm for EB individuals, 65 ± 4 mm for LB individuals, and 68 ± 2 mm for sighted blindfolded controls. These results support the hypothesis that (i) it exists a trade-off between the development of enhanced perceptual abilities and role of vision in the sound localization abilities of EB individuals, and (ii) the visual information is fundamental in calibrating some aspects of the representation of auditory space in the brain. |
format | Online Article Text |
id | pubmed-4561343 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-45613432015-10-05 Encoding audio motion: spatial impairment in early blind individuals Finocchietti, Sara Cappagli, Giulia Gori, Monica Front Psychol Psychology The consequence of blindness on auditory spatial localization has been an interesting issue of research in the last decade providing mixed results. Enhanced auditory spatial skills in individuals with visual impairment have been reported by multiple studies, while some aspects of spatial hearing seem to be impaired in the absence of vision. In this study, the ability to encode the trajectory of a 2-dimensional sound motion, reproducing the complete movement, and reaching the correct end-point sound position, is evaluated in 12 early blind (EB) individuals, 8 late blind (LB) individuals, and 20 age-matched sighted blindfolded controls. EB individuals correctly determine the direction of the sound motion on the horizontal axis, but show a clear deficit in encoding the sound motion in the lower side of the plane. On the contrary, LB individuals and blindfolded controls perform much better with no deficit in the lower side of the plane. In fact the mean localization error resulted 271 ± 10 mm for EB individuals, 65 ± 4 mm for LB individuals, and 68 ± 2 mm for sighted blindfolded controls. These results support the hypothesis that (i) it exists a trade-off between the development of enhanced perceptual abilities and role of vision in the sound localization abilities of EB individuals, and (ii) the visual information is fundamental in calibrating some aspects of the representation of auditory space in the brain. Frontiers Media S.A. 2015-09-07 /pmc/articles/PMC4561343/ /pubmed/26441733 http://dx.doi.org/10.3389/fpsyg.2015.01357 Text en Copyright © 2015 Finocchietti, Cappagli and Gori. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
spellingShingle | Psychology Finocchietti, Sara Cappagli, Giulia Gori, Monica Encoding audio motion: spatial impairment in early blind individuals |
title | Encoding audio motion: spatial impairment in early blind individuals |
title_full | Encoding audio motion: spatial impairment in early blind individuals |
title_fullStr | Encoding audio motion: spatial impairment in early blind individuals |
title_full_unstemmed | Encoding audio motion: spatial impairment in early blind individuals |
title_short | Encoding audio motion: spatial impairment in early blind individuals |
title_sort | encoding audio motion: spatial impairment in early blind individuals |
topic | Psychology |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4561343/ https://www.ncbi.nlm.nih.gov/pubmed/26441733 http://dx.doi.org/10.3389/fpsyg.2015.01357 |
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