Local opposite orientation preferences in V1: fMRI sensitivity to fine-grained pattern information

Abstract The orientation of a visual grating can be decoded from human primary visual cortex (V1) using functional magnetic resonance imaging (fMRI) at conventional resolutions (2–3 mm voxel width, 3T scanner). It is unclear to what extent this information originates from different spatial scales of...

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Auteurs principaux:	Arjen Alink, Alexander Walther, Alexandra Krugliak, Nikolaus Kriegeskorte
Format:	article
Langue:	EN
Publié:	Nature Portfolio 2017
Sujets:	Medicine R Science Q
Accès en ligne:	https://doaj.org/article/d6b7c509d52343e1b5b4e0610772ad39
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spelling	oai:doaj.org-article:d6b7c509d52343e1b5b4e0610772ad392021-12-02T11:40:42ZLocal opposite orientation preferences in V1: fMRI sensitivity to fine-grained pattern information10.1038/s41598-017-07036-82045-2322https://doaj.org/article/d6b7c509d52343e1b5b4e0610772ad392017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-07036-8https://doaj.org/toc/2045-2322Abstract The orientation of a visual grating can be decoded from human primary visual cortex (V1) using functional magnetic resonance imaging (fMRI) at conventional resolutions (2–3 mm voxel width, 3T scanner). It is unclear to what extent this information originates from different spatial scales of neuronal selectivity, ranging from orientation columns to global areal maps. According to the global-areal-map account, fMRI orientation decoding relies exclusively on fMRI voxels in V1 exhibiting a radial or vertical preference. Here we show, by contrast, that 2-mm isotropic voxels in a small patch of V1 within a quarterfield representation exhibit reliable opposite selectivities. Sets of voxels with opposite selectivities are locally intermingled and each set can support orientation decoding. This indicates that global areal maps cannot fully account for orientation information in fMRI and demonstrates that fMRI also reflects fine-grained patterns of neuronal selectivity.Arjen AlinkAlexander WaltherAlexandra KrugliakNikolaus KriegeskorteNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Arjen Alink Alexander Walther Alexandra Krugliak Nikolaus Kriegeskorte Local opposite orientation preferences in V1: fMRI sensitivity to fine-grained pattern information
description	Abstract The orientation of a visual grating can be decoded from human primary visual cortex (V1) using functional magnetic resonance imaging (fMRI) at conventional resolutions (2–3 mm voxel width, 3T scanner). It is unclear to what extent this information originates from different spatial scales of neuronal selectivity, ranging from orientation columns to global areal maps. According to the global-areal-map account, fMRI orientation decoding relies exclusively on fMRI voxels in V1 exhibiting a radial or vertical preference. Here we show, by contrast, that 2-mm isotropic voxels in a small patch of V1 within a quarterfield representation exhibit reliable opposite selectivities. Sets of voxels with opposite selectivities are locally intermingled and each set can support orientation decoding. This indicates that global areal maps cannot fully account for orientation information in fMRI and demonstrates that fMRI also reflects fine-grained patterns of neuronal selectivity.
format	article
author	Arjen Alink Alexander Walther Alexandra Krugliak Nikolaus Kriegeskorte
author_facet	Arjen Alink Alexander Walther Alexandra Krugliak Nikolaus Kriegeskorte
author_sort	Arjen Alink
title	Local opposite orientation preferences in V1: fMRI sensitivity to fine-grained pattern information
title_short	Local opposite orientation preferences in V1: fMRI sensitivity to fine-grained pattern information
title_full	Local opposite orientation preferences in V1: fMRI sensitivity to fine-grained pattern information
title_fullStr	Local opposite orientation preferences in V1: fMRI sensitivity to fine-grained pattern information
title_full_unstemmed	Local opposite orientation preferences in V1: fMRI sensitivity to fine-grained pattern information
title_sort	local opposite orientation preferences in v1: fmri sensitivity to fine-grained pattern information
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/d6b7c509d52343e1b5b4e0610772ad39
work_keys_str_mv	AT arjenalink localoppositeorientationpreferencesinv1fmrisensitivitytofinegrainedpatterninformation AT alexanderwalther localoppositeorientationpreferencesinv1fmrisensitivitytofinegrainedpatterninformation AT alexandrakrugliak localoppositeorientationpreferencesinv1fmrisensitivitytofinegrainedpatterninformation AT nikolauskriegeskorte localoppositeorientationpreferencesinv1fmrisensitivitytofinegrainedpatterninformation
_version_	1718395611095498752

Local opposite orientation preferences in V1: fMRI sensitivity to fine-grained pattern information

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