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The Role of Binocular Disparity in Stereoscopic Images of Objects in the Macaque Anterior Intraparietal Area
Neurons in the macaque Anterior Intraparietal area (AIP) encode depth structure in random-dot stimuli defined by gradients of binocular disparity, but the importance of binocular disparity in real-world objects for AIP neurons is unknown. We investigated the effect of binocular disparity on the resp...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2013
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3567065/ https://www.ncbi.nlm.nih.gov/pubmed/23408970 http://dx.doi.org/10.1371/journal.pone.0055340 |
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author | Romero, Maria C. Van Dromme, Ilse C. L. Janssen, Peter |
author_facet | Romero, Maria C. Van Dromme, Ilse C. L. Janssen, Peter |
author_sort | Romero, Maria C. |
collection | PubMed |
description | Neurons in the macaque Anterior Intraparietal area (AIP) encode depth structure in random-dot stimuli defined by gradients of binocular disparity, but the importance of binocular disparity in real-world objects for AIP neurons is unknown. We investigated the effect of binocular disparity on the responses of AIP neurons to images of real-world objects during passive fixation. We presented stereoscopic images of natural and man-made objects in which the disparity information was congruent or incongruent with disparity gradients present in the real-world objects, and images of the same objects where such gradients were absent. Although more than half of the AIP neurons were significantly affected by binocular disparity, the great majority of AIP neurons remained image selective even in the absence of binocular disparity. AIP neurons tended to prefer stimuli in which the depth information derived from binocular disparity was congruent with the depth information signaled by monocular depth cues, indicating that these monocular depth cues have an influence upon AIP neurons. Finally, in contrast to neurons in the inferior temporal cortex, AIP neurons do not represent images of objects in terms of categories such as animate-inanimate, but utilize representations based upon simple shape features including aspect ratio. |
format | Online Article Text |
id | pubmed-3567065 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2013 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-35670652013-02-13 The Role of Binocular Disparity in Stereoscopic Images of Objects in the Macaque Anterior Intraparietal Area Romero, Maria C. Van Dromme, Ilse C. L. Janssen, Peter PLoS One Research Article Neurons in the macaque Anterior Intraparietal area (AIP) encode depth structure in random-dot stimuli defined by gradients of binocular disparity, but the importance of binocular disparity in real-world objects for AIP neurons is unknown. We investigated the effect of binocular disparity on the responses of AIP neurons to images of real-world objects during passive fixation. We presented stereoscopic images of natural and man-made objects in which the disparity information was congruent or incongruent with disparity gradients present in the real-world objects, and images of the same objects where such gradients were absent. Although more than half of the AIP neurons were significantly affected by binocular disparity, the great majority of AIP neurons remained image selective even in the absence of binocular disparity. AIP neurons tended to prefer stimuli in which the depth information derived from binocular disparity was congruent with the depth information signaled by monocular depth cues, indicating that these monocular depth cues have an influence upon AIP neurons. Finally, in contrast to neurons in the inferior temporal cortex, AIP neurons do not represent images of objects in terms of categories such as animate-inanimate, but utilize representations based upon simple shape features including aspect ratio. Public Library of Science 2013-02-07 /pmc/articles/PMC3567065/ /pubmed/23408970 http://dx.doi.org/10.1371/journal.pone.0055340 Text en © 2013 Romero et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited. |
spellingShingle | Research Article Romero, Maria C. Van Dromme, Ilse C. L. Janssen, Peter The Role of Binocular Disparity in Stereoscopic Images of Objects in the Macaque Anterior Intraparietal Area |
title | The Role of Binocular Disparity in Stereoscopic Images of Objects in the Macaque Anterior Intraparietal Area |
title_full | The Role of Binocular Disparity in Stereoscopic Images of Objects in the Macaque Anterior Intraparietal Area |
title_fullStr | The Role of Binocular Disparity in Stereoscopic Images of Objects in the Macaque Anterior Intraparietal Area |
title_full_unstemmed | The Role of Binocular Disparity in Stereoscopic Images of Objects in the Macaque Anterior Intraparietal Area |
title_short | The Role of Binocular Disparity in Stereoscopic Images of Objects in the Macaque Anterior Intraparietal Area |
title_sort | role of binocular disparity in stereoscopic images of objects in the macaque anterior intraparietal area |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3567065/ https://www.ncbi.nlm.nih.gov/pubmed/23408970 http://dx.doi.org/10.1371/journal.pone.0055340 |
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