Neural mechanisms by which attention modulates the comparison of remembered and perceptual representations.

Attention is important for effectively comparing incoming perceptual information with the contents of visual short-term memory (VSTM), such that any differences can be detected. However, how attentional mechanisms operate upon these comparison processes remains largely unknown. Here we investigate t...

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Autores principales:	Bo-Cheng Kuo, Duncan E Astle
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2014
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/4e621bed6da14f518cb5bbcf03f4911f
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id	oai:doaj.org-article:4e621bed6da14f518cb5bbcf03f4911f
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spelling	oai:doaj.org-article:4e621bed6da14f518cb5bbcf03f4911f2021-11-18T08:36:43ZNeural mechanisms by which attention modulates the comparison of remembered and perceptual representations.1932-620310.1371/journal.pone.0086666https://doaj.org/article/4e621bed6da14f518cb5bbcf03f4911f2014-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24466193/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203Attention is important for effectively comparing incoming perceptual information with the contents of visual short-term memory (VSTM), such that any differences can be detected. However, how attentional mechanisms operate upon these comparison processes remains largely unknown. Here we investigate the underlying neural mechanisms by which attention modulates the comparisons between VSTM and perceptual representations using functional magnetic resonance imaging (fMRI). Participants performed a cued change detection task. Spatial cues were presented to orient their attention either to the location of an item in VSTM prior to its comparison (retro-cues), or simultaneously (simultaneous-cues) with the probe array. A no-cue condition was also included. When attention cannot be effectively deployed in advance (i.e. following the simultaneous-cues), we observed a distributed and extensive activation pattern in the prefrontal and parietal cortices in support of successful change detection. This was not the case when participants can deploy their attention in advance (i.e. following the retro-cues). The region-of-interest analyses confirmed that neural responses for successful change detection versus correct rejection in the visual and parietal regions were significantly different for simultaneous-cues compared to retro-cues. Importantly, we found enhanced functional connectivity between prefrontal and parietal cortices when detecting changes on the simultaneous-cue trials. Moreover, we demonstrated a close relationship between this functional connectivity and d' scores. Together, our findings elucidate the attentional and neural mechanisms by which items held in VSTM are compared with incoming perceptual information.Bo-Cheng KuoDuncan E AstlePublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 9, Iss 1, p e86666 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Bo-Cheng Kuo Duncan E Astle Neural mechanisms by which attention modulates the comparison of remembered and perceptual representations.
description	Attention is important for effectively comparing incoming perceptual information with the contents of visual short-term memory (VSTM), such that any differences can be detected. However, how attentional mechanisms operate upon these comparison processes remains largely unknown. Here we investigate the underlying neural mechanisms by which attention modulates the comparisons between VSTM and perceptual representations using functional magnetic resonance imaging (fMRI). Participants performed a cued change detection task. Spatial cues were presented to orient their attention either to the location of an item in VSTM prior to its comparison (retro-cues), or simultaneously (simultaneous-cues) with the probe array. A no-cue condition was also included. When attention cannot be effectively deployed in advance (i.e. following the simultaneous-cues), we observed a distributed and extensive activation pattern in the prefrontal and parietal cortices in support of successful change detection. This was not the case when participants can deploy their attention in advance (i.e. following the retro-cues). The region-of-interest analyses confirmed that neural responses for successful change detection versus correct rejection in the visual and parietal regions were significantly different for simultaneous-cues compared to retro-cues. Importantly, we found enhanced functional connectivity between prefrontal and parietal cortices when detecting changes on the simultaneous-cue trials. Moreover, we demonstrated a close relationship between this functional connectivity and d' scores. Together, our findings elucidate the attentional and neural mechanisms by which items held in VSTM are compared with incoming perceptual information.
format	article
author	Bo-Cheng Kuo Duncan E Astle
author_facet	Bo-Cheng Kuo Duncan E Astle
author_sort	Bo-Cheng Kuo
title	Neural mechanisms by which attention modulates the comparison of remembered and perceptual representations.
title_short	Neural mechanisms by which attention modulates the comparison of remembered and perceptual representations.
title_full	Neural mechanisms by which attention modulates the comparison of remembered and perceptual representations.
title_fullStr	Neural mechanisms by which attention modulates the comparison of remembered and perceptual representations.
title_full_unstemmed	Neural mechanisms by which attention modulates the comparison of remembered and perceptual representations.
title_sort	neural mechanisms by which attention modulates the comparison of remembered and perceptual representations.
publisher	Public Library of Science (PLoS)
publishDate	2014
url	https://doaj.org/article/4e621bed6da14f518cb5bbcf03f4911f
work_keys_str_mv	AT bochengkuo neuralmechanismsbywhichattentionmodulatesthecomparisonofrememberedandperceptualrepresentations AT duncaneastle neuralmechanismsbywhichattentionmodulatesthecomparisonofrememberedandperceptualrepresentations
_version_	1718421558865690624

Neural mechanisms by which attention modulates the comparison of remembered and perceptual representations.

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