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Cross-orientation suppression in visual area V2

Object recognition relies on a series of transformations among which only the first cortical stage is relatively well understood. Already at the second stage, the visual area V2, the complexity of the transformation precludes a clear understanding of what specifically this area computes. Previous wo...

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Detalles Bibliográficos
Autores principales: Rowekamp, Ryan J., Sharpee, Tatyana O.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5472723/
https://www.ncbi.nlm.nih.gov/pubmed/28593941
http://dx.doi.org/10.1038/ncomms15739
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author Rowekamp, Ryan J.
Sharpee, Tatyana O.
author_facet Rowekamp, Ryan J.
Sharpee, Tatyana O.
author_sort Rowekamp, Ryan J.
collection PubMed
description Object recognition relies on a series of transformations among which only the first cortical stage is relatively well understood. Already at the second stage, the visual area V2, the complexity of the transformation precludes a clear understanding of what specifically this area computes. Previous work has found multiple types of V2 neurons, with neurons of each type selective for multi-edge features. Here we analyse responses of V2 neurons to natural stimuli and find three organizing principles. First, the relevant edges for V2 neurons can be grouped into quadrature pairs, indicating invariance to local translation. Second, the excitatory edges have nearby suppressive edges with orthogonal orientations. Third, the resulting multi-edge patterns are repeated in space to form textures or texture boundaries. The cross-orientation suppression increases the sparseness of responses to natural images based on these complex forms of feature selectivity while allowing for multiple scales of position invariance.
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spelling pubmed-54727232017-06-28 Cross-orientation suppression in visual area V2 Rowekamp, Ryan J. Sharpee, Tatyana O. Nat Commun Article Object recognition relies on a series of transformations among which only the first cortical stage is relatively well understood. Already at the second stage, the visual area V2, the complexity of the transformation precludes a clear understanding of what specifically this area computes. Previous work has found multiple types of V2 neurons, with neurons of each type selective for multi-edge features. Here we analyse responses of V2 neurons to natural stimuli and find three organizing principles. First, the relevant edges for V2 neurons can be grouped into quadrature pairs, indicating invariance to local translation. Second, the excitatory edges have nearby suppressive edges with orthogonal orientations. Third, the resulting multi-edge patterns are repeated in space to form textures or texture boundaries. The cross-orientation suppression increases the sparseness of responses to natural images based on these complex forms of feature selectivity while allowing for multiple scales of position invariance. Nature Publishing Group 2017-06-08 /pmc/articles/PMC5472723/ /pubmed/28593941 http://dx.doi.org/10.1038/ncomms15739 Text en Copyright © 2017, The Author(s) http://creativecommons.org/licenses/by/4.0/ Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Rowekamp, Ryan J.
Sharpee, Tatyana O.
Cross-orientation suppression in visual area V2
title Cross-orientation suppression in visual area V2
title_full Cross-orientation suppression in visual area V2
title_fullStr Cross-orientation suppression in visual area V2
title_full_unstemmed Cross-orientation suppression in visual area V2
title_short Cross-orientation suppression in visual area V2
title_sort cross-orientation suppression in visual area v2
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5472723/
https://www.ncbi.nlm.nih.gov/pubmed/28593941
http://dx.doi.org/10.1038/ncomms15739
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