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Adaptation decorrelates shape representations
Perception and neural responses are modulated by sensory history. Visual adaptation, an example of such an effect, has been hypothesized to improve stimulus discrimination by decorrelating responses across a set of neural units. While a central theoretical model, behavioral and neural evidence for t...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6145947/ https://www.ncbi.nlm.nih.gov/pubmed/30232324 http://dx.doi.org/10.1038/s41467-018-06278-y |
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author | Mattar, Marcelo G. Olkkonen, Maria Epstein, Russell A. Aguirre, Geoffrey K. |
author_facet | Mattar, Marcelo G. Olkkonen, Maria Epstein, Russell A. Aguirre, Geoffrey K. |
author_sort | Mattar, Marcelo G. |
collection | PubMed |
description | Perception and neural responses are modulated by sensory history. Visual adaptation, an example of such an effect, has been hypothesized to improve stimulus discrimination by decorrelating responses across a set of neural units. While a central theoretical model, behavioral and neural evidence for this theory is limited and inconclusive. Here, we use a parametric 3D shape-space to test whether adaptation decorrelates shape representations in humans. In a behavioral experiment with 20 subjects, we find that adaptation to a shape class improves discrimination of subsequently presented stimuli with similar features. In a BOLD fMRI experiment with 10 subjects, we observe that adaptation to a shape class decorrelates the multivariate representations of subsequently presented stimuli with similar features in object-selective cortex. These results support the long-standing proposal that adaptation improves perceptual discrimination and decorrelates neural representations, offering insights into potential underlying mechanisms. |
format | Online Article Text |
id | pubmed-6145947 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-61459472018-09-24 Adaptation decorrelates shape representations Mattar, Marcelo G. Olkkonen, Maria Epstein, Russell A. Aguirre, Geoffrey K. Nat Commun Article Perception and neural responses are modulated by sensory history. Visual adaptation, an example of such an effect, has been hypothesized to improve stimulus discrimination by decorrelating responses across a set of neural units. While a central theoretical model, behavioral and neural evidence for this theory is limited and inconclusive. Here, we use a parametric 3D shape-space to test whether adaptation decorrelates shape representations in humans. In a behavioral experiment with 20 subjects, we find that adaptation to a shape class improves discrimination of subsequently presented stimuli with similar features. In a BOLD fMRI experiment with 10 subjects, we observe that adaptation to a shape class decorrelates the multivariate representations of subsequently presented stimuli with similar features in object-selective cortex. These results support the long-standing proposal that adaptation improves perceptual discrimination and decorrelates neural representations, offering insights into potential underlying mechanisms. Nature Publishing Group UK 2018-09-19 /pmc/articles/PMC6145947/ /pubmed/30232324 http://dx.doi.org/10.1038/s41467-018-06278-y Text en © The Author(s) 2018 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 Mattar, Marcelo G. Olkkonen, Maria Epstein, Russell A. Aguirre, Geoffrey K. Adaptation decorrelates shape representations |
title | Adaptation decorrelates shape representations |
title_full | Adaptation decorrelates shape representations |
title_fullStr | Adaptation decorrelates shape representations |
title_full_unstemmed | Adaptation decorrelates shape representations |
title_short | Adaptation decorrelates shape representations |
title_sort | adaptation decorrelates shape representations |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6145947/ https://www.ncbi.nlm.nih.gov/pubmed/30232324 http://dx.doi.org/10.1038/s41467-018-06278-y |
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