Encoding audio motion: spatial impairment in early blind individuals
Identifieur interne : 000920 ( Main/Merge ); précédent : 000919; suivant : 000921Encoding audio motion: spatial impairment in early blind individuals
Auteurs : Sara Finocchietti ; Giulia Cappagli ; Monica GoriSource :
- Frontiers in Psychology [ 1664-1078 ] ; 2015.
Abstract
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.
Url:
DOI: 10.3389/fpsyg.2015.01357
PubMed: 26441733
PubMed Central: 4561343
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Encoding audio motion: spatial impairment in early blind individuals</title><author><name sortKey="Finocchietti, Sara" sort="Finocchietti, Sara" uniqKey="Finocchietti S" first="Sara" last="Finocchietti">Sara Finocchietti</name></author><author><name sortKey="Cappagli, Giulia" sort="Cappagli, Giulia" uniqKey="Cappagli G" first="Giulia" last="Cappagli">Giulia Cappagli</name></author><author><name sortKey="Gori, Monica" sort="Gori, Monica" uniqKey="Gori M" first="Monica" last="Gori">Monica Gori</name></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">26441733</idno><idno type="pmc">4561343</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4561343</idno><idno type="RBID">PMC:4561343</idno><idno type="doi">10.3389/fpsyg.2015.01357</idno><date when="2015">2015</date><idno type="wicri:Area/Pmc/Corpus">000210</idno><idno type="wicri:Area/Pmc/Curation">000210</idno><idno type="wicri:Area/Pmc/Checkpoint">000599</idno><idno type="wicri:Area/Ncbi/Merge">003C76</idno><idno type="wicri:Area/Ncbi/Curation">003C76</idno><idno type="wicri:Area/Ncbi/Checkpoint">003C76</idno><idno type="wicri:Area/Main/Merge">000920</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Encoding audio motion: spatial impairment in early blind individuals</title><author><name sortKey="Finocchietti, Sara" sort="Finocchietti, Sara" uniqKey="Finocchietti S" first="Sara" last="Finocchietti">Sara Finocchietti</name></author><author><name sortKey="Cappagli, Giulia" sort="Cappagli, Giulia" uniqKey="Cappagli G" first="Giulia" last="Cappagli">Giulia Cappagli</name></author><author><name sortKey="Gori, Monica" sort="Gori, Monica" uniqKey="Gori M" first="Monica" last="Gori">Monica Gori</name></author></analytic><series><title level="j">Frontiers in Psychology</title><idno type="eISSN">1664-1078</idno><imprint><date when="2015">2015</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p>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.</p></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Bavelier, D" uniqKey="Bavelier D">D. Bavelier</name></author><author><name sortKey="Hirshorn, E A" uniqKey="Hirshorn E">E. A. Hirshorn</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Collignon, O" uniqKey="Collignon O">O. Collignon</name></author><author><name sortKey="Voss, P" uniqKey="Voss P">P. Voss</name></author><author><name sortKey="Lassonde, M" uniqKey="Lassonde M">M. Lassonde</name></author><author><name sortKey="Lepore, F" uniqKey="Lepore F">F. 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