Retinotopic mapping of categorical and coordinate spatial relation processing in early visual cortex.

Spatial relations are commonly divided in two global classes. Categorical relations concern abstract relations which define areas of spatial equivalence, whereas coordinate relations are metric and concern exact distances. Categorical and coordinate relation processing are thought to rely on at leas...

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Autores principales:	Ineke J M van der Ham, Maarten J A Duijndam, Mathijs Raemaekers, Richard J A van Wezel, Anna Oleksiak, Albert Postma
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2012
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f0c3b1b06bc0493caa6125c712f06933
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spelling	oai:doaj.org-article:f0c3b1b06bc0493caa6125c712f069332021-11-18T07:15:03ZRetinotopic mapping of categorical and coordinate spatial relation processing in early visual cortex.1932-620310.1371/journal.pone.0038644https://doaj.org/article/f0c3b1b06bc0493caa6125c712f069332012-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22723872/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203Spatial relations are commonly divided in two global classes. Categorical relations concern abstract relations which define areas of spatial equivalence, whereas coordinate relations are metric and concern exact distances. Categorical and coordinate relation processing are thought to rely on at least partially separate neurocognitive mechanisms, as reflected by differential lateralization patterns, in particular in the parietal cortex. In this study we address this textbook principle from a new angle. We studied retinotopic activation in early visual cortex, as a reflection of attentional distribution, in a spatial working memory task with either a categorical or a coordinate instruction. Participants were asked to memorize a dot position, with regard to a central cross, and to indicate whether a subsequent dot position matched the first dot position, either categorically (opposite quadrant of the cross) or coordinately (same distance to the centre of the cross). BOLD responses across the retinotopic maps of V1, V2, and V3 indicate that the spatial distribution of cortical activity was different for categorical and coordinate instructions throughout the retention interval; a more local focus was found during categorical processing, whereas focus was more global for coordinate processing. This effect was strongest for V3, approached significance in V2 and was absent in V1. Furthermore, during stimulus presentation the two instructions led to different levels of activation in V3 during stimulus encoding; a stronger increase in activity was found for categorical processing. Together this is the first demonstration that instructions for specific types of spatial relations may yield distinct attentional patterns which are already reflected in activity early in the visual cortex.Ineke J M van der HamMaarten J A DuijndamMathijs RaemaekersRichard J A van WezelAnna OleksiakAlbert PostmaPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 7, Iss 6, p e38644 (2012)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Ineke J M van der Ham Maarten J A Duijndam Mathijs Raemaekers Richard J A van Wezel Anna Oleksiak Albert Postma Retinotopic mapping of categorical and coordinate spatial relation processing in early visual cortex.
description	Spatial relations are commonly divided in two global classes. Categorical relations concern abstract relations which define areas of spatial equivalence, whereas coordinate relations are metric and concern exact distances. Categorical and coordinate relation processing are thought to rely on at least partially separate neurocognitive mechanisms, as reflected by differential lateralization patterns, in particular in the parietal cortex. In this study we address this textbook principle from a new angle. We studied retinotopic activation in early visual cortex, as a reflection of attentional distribution, in a spatial working memory task with either a categorical or a coordinate instruction. Participants were asked to memorize a dot position, with regard to a central cross, and to indicate whether a subsequent dot position matched the first dot position, either categorically (opposite quadrant of the cross) or coordinately (same distance to the centre of the cross). BOLD responses across the retinotopic maps of V1, V2, and V3 indicate that the spatial distribution of cortical activity was different for categorical and coordinate instructions throughout the retention interval; a more local focus was found during categorical processing, whereas focus was more global for coordinate processing. This effect was strongest for V3, approached significance in V2 and was absent in V1. Furthermore, during stimulus presentation the two instructions led to different levels of activation in V3 during stimulus encoding; a stronger increase in activity was found for categorical processing. Together this is the first demonstration that instructions for specific types of spatial relations may yield distinct attentional patterns which are already reflected in activity early in the visual cortex.
format	article
author	Ineke J M van der Ham Maarten J A Duijndam Mathijs Raemaekers Richard J A van Wezel Anna Oleksiak Albert Postma
author_facet	Ineke J M van der Ham Maarten J A Duijndam Mathijs Raemaekers Richard J A van Wezel Anna Oleksiak Albert Postma
author_sort	Ineke J M van der Ham
title	Retinotopic mapping of categorical and coordinate spatial relation processing in early visual cortex.
title_short	Retinotopic mapping of categorical and coordinate spatial relation processing in early visual cortex.
title_full	Retinotopic mapping of categorical and coordinate spatial relation processing in early visual cortex.
title_fullStr	Retinotopic mapping of categorical and coordinate spatial relation processing in early visual cortex.
title_full_unstemmed	Retinotopic mapping of categorical and coordinate spatial relation processing in early visual cortex.
title_sort	retinotopic mapping of categorical and coordinate spatial relation processing in early visual cortex.
publisher	Public Library of Science (PLoS)
publishDate	2012
url	https://doaj.org/article/f0c3b1b06bc0493caa6125c712f06933
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Retinotopic mapping of categorical and coordinate spatial relation processing in early visual cortex.

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