Spatiotopic coding of BOLD signal in human visual cortex depends on spatial attention.

The neural substrate of the phenomenological experience of a stable visual world remains obscure. One possible mechanism would be to construct spatiotopic neural maps where the response is selective to the position of the stimulus in external space, rather than to retinal eccentricities, but evidenc...

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Autores principales:	Sofia Crespi, Laura Biagi, Giovanni d'Avossa, David C Burr, Michela Tosetti, Maria Concetta Morrone
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2011
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/2b23a10c0a254f17a88233971c88cc3b
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spelling	oai:doaj.org-article:2b23a10c0a254f17a88233971c88cc3b2021-11-18T06:50:38ZSpatiotopic coding of BOLD signal in human visual cortex depends on spatial attention.1932-620310.1371/journal.pone.0021661https://doaj.org/article/2b23a10c0a254f17a88233971c88cc3b2011-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/21750720/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203The neural substrate of the phenomenological experience of a stable visual world remains obscure. One possible mechanism would be to construct spatiotopic neural maps where the response is selective to the position of the stimulus in external space, rather than to retinal eccentricities, but evidence for these maps has been inconsistent. Here we show, with fMRI, that when human subjects perform concomitantly a demanding attentive task on stimuli displayed at the fovea, BOLD responses evoked by moving stimuli irrelevant to the task were mostly tuned in retinotopic coordinates. However, under more unconstrained conditions, where subjects could attend easily to the motion stimuli, BOLD responses were tuned not in retinal but in external coordinates (spatiotopic selectivity) in many visual areas, including MT, MST, LO and V6, agreeing with our previous fMRI study. These results indicate that spatial attention may play an important role in mediating spatiotopic selectivity.Sofia CrespiLaura BiagiGiovanni d'AvossaDavid C BurrMichela TosettiMaria Concetta MorronePublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 6, Iss 7, p e21661 (2011)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Sofia Crespi Laura Biagi Giovanni d'Avossa David C Burr Michela Tosetti Maria Concetta Morrone Spatiotopic coding of BOLD signal in human visual cortex depends on spatial attention.
description	The neural substrate of the phenomenological experience of a stable visual world remains obscure. One possible mechanism would be to construct spatiotopic neural maps where the response is selective to the position of the stimulus in external space, rather than to retinal eccentricities, but evidence for these maps has been inconsistent. Here we show, with fMRI, that when human subjects perform concomitantly a demanding attentive task on stimuli displayed at the fovea, BOLD responses evoked by moving stimuli irrelevant to the task were mostly tuned in retinotopic coordinates. However, under more unconstrained conditions, where subjects could attend easily to the motion stimuli, BOLD responses were tuned not in retinal but in external coordinates (spatiotopic selectivity) in many visual areas, including MT, MST, LO and V6, agreeing with our previous fMRI study. These results indicate that spatial attention may play an important role in mediating spatiotopic selectivity.
format	article
author	Sofia Crespi Laura Biagi Giovanni d'Avossa David C Burr Michela Tosetti Maria Concetta Morrone
author_facet	Sofia Crespi Laura Biagi Giovanni d'Avossa David C Burr Michela Tosetti Maria Concetta Morrone
author_sort	Sofia Crespi
title	Spatiotopic coding of BOLD signal in human visual cortex depends on spatial attention.
title_short	Spatiotopic coding of BOLD signal in human visual cortex depends on spatial attention.
title_full	Spatiotopic coding of BOLD signal in human visual cortex depends on spatial attention.
title_fullStr	Spatiotopic coding of BOLD signal in human visual cortex depends on spatial attention.
title_full_unstemmed	Spatiotopic coding of BOLD signal in human visual cortex depends on spatial attention.
title_sort	spatiotopic coding of bold signal in human visual cortex depends on spatial attention.
publisher	Public Library of Science (PLoS)
publishDate	2011
url	https://doaj.org/article/2b23a10c0a254f17a88233971c88cc3b
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Spatiotopic coding of BOLD signal in human visual cortex depends on spatial attention.

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