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Dissociations between spatial-attentional processes within parietal cortex: insights from hybrid spatial cueing and change detection paradigms

Spatial cueing has been used by many different groups under multiple forms to study spatial attention processes. We will present evidence obtained in brain-damaged patients and healthy volunteers using a variant of this paradigm, the hybrid spatial cueing paradigm, which, besides single-target trial...

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Autores principales: Vandenberghe, Rik, Gillebert, Céline R.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3712144/
https://www.ncbi.nlm.nih.gov/pubmed/23882202
http://dx.doi.org/10.3389/fnhum.2013.00366
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author Vandenberghe, Rik
Gillebert, Céline R.
author_facet Vandenberghe, Rik
Gillebert, Céline R.
author_sort Vandenberghe, Rik
collection PubMed
description Spatial cueing has been used by many different groups under multiple forms to study spatial attention processes. We will present evidence obtained in brain-damaged patients and healthy volunteers using a variant of this paradigm, the hybrid spatial cueing paradigm, which, besides single-target trials with valid and invalid cues, also contains trials where a target is accompanied by a contralateral competing stimulus (competition trials). This allows one to study invalidity-related processes and selection between competing stimuli within the same paradigm. In brain-damaged patients, lesions confined to the intraparietal sulcus result in contralesional attentional deficits, both during competition and invalid trials, according to a pattern that does not differ from that observed following inferior parietal lesions. In healthy volunteers, however, selection between competing stimuli and invalidity-related processes are partially dissociable, the former relying mainly on cytoarchitectonic areas hIP1-3 in the intraparietal sulcus, the latter on cytoarchitectonic area PF in the right inferior parietal lobule. The activity profile in more posterior inferior parietal areas PFm and PGa, does not distinguish between both types of trials. The functional account for right PF and adjacent areas is further constrained by the activity profile observed during other experimental paradigms. In a change detection task with variable target and distracter set size, for example, these inferior parietal areas show highest activity when the stimulus array consists of only one single target, while the intraparietal sulcus show increased activity as the array contains more targets and distracters. Together, these findings lead us to the hypothesis that right PF functions as a target singleton detector, which is activated when a target stands out from the background, referring both to the temporal background (expectancy) and the momentaneous background (stimulus-driven saliency).
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spelling pubmed-37121442013-07-23 Dissociations between spatial-attentional processes within parietal cortex: insights from hybrid spatial cueing and change detection paradigms Vandenberghe, Rik Gillebert, Céline R. Front Hum Neurosci Neuroscience Spatial cueing has been used by many different groups under multiple forms to study spatial attention processes. We will present evidence obtained in brain-damaged patients and healthy volunteers using a variant of this paradigm, the hybrid spatial cueing paradigm, which, besides single-target trials with valid and invalid cues, also contains trials where a target is accompanied by a contralateral competing stimulus (competition trials). This allows one to study invalidity-related processes and selection between competing stimuli within the same paradigm. In brain-damaged patients, lesions confined to the intraparietal sulcus result in contralesional attentional deficits, both during competition and invalid trials, according to a pattern that does not differ from that observed following inferior parietal lesions. In healthy volunteers, however, selection between competing stimuli and invalidity-related processes are partially dissociable, the former relying mainly on cytoarchitectonic areas hIP1-3 in the intraparietal sulcus, the latter on cytoarchitectonic area PF in the right inferior parietal lobule. The activity profile in more posterior inferior parietal areas PFm and PGa, does not distinguish between both types of trials. The functional account for right PF and adjacent areas is further constrained by the activity profile observed during other experimental paradigms. In a change detection task with variable target and distracter set size, for example, these inferior parietal areas show highest activity when the stimulus array consists of only one single target, while the intraparietal sulcus show increased activity as the array contains more targets and distracters. Together, these findings lead us to the hypothesis that right PF functions as a target singleton detector, which is activated when a target stands out from the background, referring both to the temporal background (expectancy) and the momentaneous background (stimulus-driven saliency). Frontiers Media S.A. 2013-07-16 /pmc/articles/PMC3712144/ /pubmed/23882202 http://dx.doi.org/10.3389/fnhum.2013.00366 Text en Copyright © 2013 Vandenberghe and Gillebert. http://creativecommons.org/licenses/by/3.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in other forums, provided the original authors and source are credited and subject to any copyright notices concerning any third-party graphics etc.
spellingShingle Neuroscience
Vandenberghe, Rik
Gillebert, Céline R.
Dissociations between spatial-attentional processes within parietal cortex: insights from hybrid spatial cueing and change detection paradigms
title Dissociations between spatial-attentional processes within parietal cortex: insights from hybrid spatial cueing and change detection paradigms
title_full Dissociations between spatial-attentional processes within parietal cortex: insights from hybrid spatial cueing and change detection paradigms
title_fullStr Dissociations between spatial-attentional processes within parietal cortex: insights from hybrid spatial cueing and change detection paradigms
title_full_unstemmed Dissociations between spatial-attentional processes within parietal cortex: insights from hybrid spatial cueing and change detection paradigms
title_short Dissociations between spatial-attentional processes within parietal cortex: insights from hybrid spatial cueing and change detection paradigms
title_sort dissociations between spatial-attentional processes within parietal cortex: insights from hybrid spatial cueing and change detection paradigms
topic Neuroscience
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3712144/
https://www.ncbi.nlm.nih.gov/pubmed/23882202
http://dx.doi.org/10.3389/fnhum.2013.00366
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