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Neural representation of three-dimensional acoustic space in the human temporal lobe
Sound localization is an important function of the human brain, but the underlying cortical mechanisms remain unclear. In this study, we recorded auditory stimuli in three-dimensional space and then replayed the stimuli through earphones during functional magnetic resonance imaging (fMRI). By employ...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Frontiers Media S.A.
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4399328/ https://www.ncbi.nlm.nih.gov/pubmed/25932011 http://dx.doi.org/10.3389/fnhum.2015.00203 |
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author | Zhang, Xiaolu Zhang, Qingtian Hu, Xiaolin Zhang, Bo |
author_facet | Zhang, Xiaolu Zhang, Qingtian Hu, Xiaolin Zhang, Bo |
author_sort | Zhang, Xiaolu |
collection | PubMed |
description | Sound localization is an important function of the human brain, but the underlying cortical mechanisms remain unclear. In this study, we recorded auditory stimuli in three-dimensional space and then replayed the stimuli through earphones during functional magnetic resonance imaging (fMRI). By employing a machine learning algorithm, we successfully decoded sound location from the blood oxygenation level-dependent signals in the temporal lobe. Analysis of the data revealed that different cortical patterns were evoked by sounds from different locations. Specifically, discrimination of sound location along the abscissa axis evoked robust responses in the left posterior superior temporal gyrus (STG) and right mid-STG, discrimination along the elevation (EL) axis evoked robust responses in the left posterior middle temporal lobe (MTL) and right STG, and discrimination along the ordinate axis evoked robust responses in the left mid-MTL and right mid-STG. These results support a distributed representation of acoustic space in human cortex. |
format | Online Article Text |
id | pubmed-4399328 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-43993282015-04-30 Neural representation of three-dimensional acoustic space in the human temporal lobe Zhang, Xiaolu Zhang, Qingtian Hu, Xiaolin Zhang, Bo Front Hum Neurosci Neuroscience Sound localization is an important function of the human brain, but the underlying cortical mechanisms remain unclear. In this study, we recorded auditory stimuli in three-dimensional space and then replayed the stimuli through earphones during functional magnetic resonance imaging (fMRI). By employing a machine learning algorithm, we successfully decoded sound location from the blood oxygenation level-dependent signals in the temporal lobe. Analysis of the data revealed that different cortical patterns were evoked by sounds from different locations. Specifically, discrimination of sound location along the abscissa axis evoked robust responses in the left posterior superior temporal gyrus (STG) and right mid-STG, discrimination along the elevation (EL) axis evoked robust responses in the left posterior middle temporal lobe (MTL) and right STG, and discrimination along the ordinate axis evoked robust responses in the left mid-MTL and right mid-STG. These results support a distributed representation of acoustic space in human cortex. Frontiers Media S.A. 2015-04-16 /pmc/articles/PMC4399328/ /pubmed/25932011 http://dx.doi.org/10.3389/fnhum.2015.00203 Text en Copyright © 2015 Zhang, Zhang, Hu and Zhang. 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 and 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 | Neuroscience Zhang, Xiaolu Zhang, Qingtian Hu, Xiaolin Zhang, Bo Neural representation of three-dimensional acoustic space in the human temporal lobe |
title | Neural representation of three-dimensional acoustic space in the human temporal lobe |
title_full | Neural representation of three-dimensional acoustic space in the human temporal lobe |
title_fullStr | Neural representation of three-dimensional acoustic space in the human temporal lobe |
title_full_unstemmed | Neural representation of three-dimensional acoustic space in the human temporal lobe |
title_short | Neural representation of three-dimensional acoustic space in the human temporal lobe |
title_sort | neural representation of three-dimensional acoustic space in the human temporal lobe |
topic | Neuroscience |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4399328/ https://www.ncbi.nlm.nih.gov/pubmed/25932011 http://dx.doi.org/10.3389/fnhum.2015.00203 |
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