Differences in selectivity to natural images in early visual areas (V1–V3)

Abstract High-level regions of the ventral visual pathway respond more to intact objects compared to scrambled objects. The aim of this study was to determine if this selectivity for objects emerges at an earlier stage of processing. Visual areas (V1–V3) were defined for each participant using retin...

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Autores principales:	David D. Coggan, Luke A. Allen, Oliver R. H. Farrar, Andre D. Gouws, Antony B. Morland, Daniel H. Baker, Timothy J. Andrews
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/44564e5f56814a11ba04f43b3efc55d6
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spelling	oai:doaj.org-article:44564e5f56814a11ba04f43b3efc55d62021-12-02T11:52:20ZDifferences in selectivity to natural images in early visual areas (V1–V3)10.1038/s41598-017-02569-42045-2322https://doaj.org/article/44564e5f56814a11ba04f43b3efc55d62017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-02569-4https://doaj.org/toc/2045-2322Abstract High-level regions of the ventral visual pathway respond more to intact objects compared to scrambled objects. The aim of this study was to determine if this selectivity for objects emerges at an earlier stage of processing. Visual areas (V1–V3) were defined for each participant using retinotopic mapping. Participants then viewed intact and scrambled images from different object categories (bottle, chair, face, house, shoe) while neural responses were measured using fMRI. Our rationale for using scrambled images is that they contain the same low-level properties as the intact objects, but lack the higher-order combinations of features that are characteristic of natural images. Neural responses were higher for scrambled than intact images in all regions. However, the difference between intact and scrambled images was smaller in V3 compared to V1 and V2. Next, we measured the spatial patterns of response to intact and scrambled images from different object categories. We found higher within-category compared to between category correlations for both intact and scrambled images demonstrating distinct patterns of response. Spatial patterns of response were more distinct for intact compared to scrambled images in V3, but not in V1 or V2. These findings demonstrate the emergence of selectivity to natural images in V3.David D. CogganLuke A. AllenOliver R. H. FarrarAndre D. GouwsAntony B. MorlandDaniel H. BakerTimothy J. AndrewsNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q David D. Coggan Luke A. Allen Oliver R. H. Farrar Andre D. Gouws Antony B. Morland Daniel H. Baker Timothy J. Andrews Differences in selectivity to natural images in early visual areas (V1–V3)
description	Abstract High-level regions of the ventral visual pathway respond more to intact objects compared to scrambled objects. The aim of this study was to determine if this selectivity for objects emerges at an earlier stage of processing. Visual areas (V1–V3) were defined for each participant using retinotopic mapping. Participants then viewed intact and scrambled images from different object categories (bottle, chair, face, house, shoe) while neural responses were measured using fMRI. Our rationale for using scrambled images is that they contain the same low-level properties as the intact objects, but lack the higher-order combinations of features that are characteristic of natural images. Neural responses were higher for scrambled than intact images in all regions. However, the difference between intact and scrambled images was smaller in V3 compared to V1 and V2. Next, we measured the spatial patterns of response to intact and scrambled images from different object categories. We found higher within-category compared to between category correlations for both intact and scrambled images demonstrating distinct patterns of response. Spatial patterns of response were more distinct for intact compared to scrambled images in V3, but not in V1 or V2. These findings demonstrate the emergence of selectivity to natural images in V3.
format	article
author	David D. Coggan Luke A. Allen Oliver R. H. Farrar Andre D. Gouws Antony B. Morland Daniel H. Baker Timothy J. Andrews
author_facet	David D. Coggan Luke A. Allen Oliver R. H. Farrar Andre D. Gouws Antony B. Morland Daniel H. Baker Timothy J. Andrews
author_sort	David D. Coggan
title	Differences in selectivity to natural images in early visual areas (V1–V3)
title_short	Differences in selectivity to natural images in early visual areas (V1–V3)
title_full	Differences in selectivity to natural images in early visual areas (V1–V3)
title_fullStr	Differences in selectivity to natural images in early visual areas (V1–V3)
title_full_unstemmed	Differences in selectivity to natural images in early visual areas (V1–V3)
title_sort	differences in selectivity to natural images in early visual areas (v1–v3)
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/44564e5f56814a11ba04f43b3efc55d6
work_keys_str_mv	AT daviddcoggan differencesinselectivitytonaturalimagesinearlyvisualareasv1v3 AT lukeaallen differencesinselectivitytonaturalimagesinearlyvisualareasv1v3 AT oliverrhfarrar differencesinselectivitytonaturalimagesinearlyvisualareasv1v3 AT andredgouws differencesinselectivitytonaturalimagesinearlyvisualareasv1v3 AT antonybmorland differencesinselectivitytonaturalimagesinearlyvisualareasv1v3 AT danielhbaker differencesinselectivitytonaturalimagesinearlyvisualareasv1v3 AT timothyjandrews differencesinselectivitytonaturalimagesinearlyvisualareasv1v3
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Differences in selectivity to natural images in early visual areas (V1–V3)

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