Occipital alpha activity during stimulus processing gates the information flow to object-selective cortex.

Given the limited processing capabilities of the sensory system, it is essential that attended information is gated to downstream areas, whereas unattended information is blocked. While it has been proposed that alpha band (8-13 Hz) activity serves to route information to downstream regions by inhib...

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Autores principales:	Johanna M Zumer, René Scheeringa, Jan-Mathijs Schoffelen, David G Norris, Ole Jensen
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2014
Materias:	Biology (General) QH301-705.5
Acceso en línea:	https://doaj.org/article/fb8957e70ad04de19a4b8d188372e4f5
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id	oai:doaj.org-article:fb8957e70ad04de19a4b8d188372e4f5
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spelling	oai:doaj.org-article:fb8957e70ad04de19a4b8d188372e4f52021-11-25T05:32:55ZOccipital alpha activity during stimulus processing gates the information flow to object-selective cortex.1544-91731545-788510.1371/journal.pbio.1001965https://doaj.org/article/fb8957e70ad04de19a4b8d188372e4f52014-10-01T00:00:00Zhttps://doi.org/10.1371/journal.pbio.1001965https://doaj.org/toc/1544-9173https://doaj.org/toc/1545-7885Given the limited processing capabilities of the sensory system, it is essential that attended information is gated to downstream areas, whereas unattended information is blocked. While it has been proposed that alpha band (8-13 Hz) activity serves to route information to downstream regions by inhibiting neuronal processing in task-irrelevant regions, this hypothesis remains untested. Here we investigate how neuronal oscillations detected by electroencephalography in visual areas during working memory encoding serve to gate information reflected in the simultaneously recorded blood-oxygenation-level-dependent (BOLD) signals recorded by functional magnetic resonance imaging in downstream ventral regions. We used a paradigm in which 16 participants were presented with faces and landscapes in the right and left hemifields; one hemifield was attended and the other unattended. We observed that decreased alpha power contralateral to the attended object predicted the BOLD signal representing the attended object in ventral object-selective regions. Furthermore, increased alpha power ipsilateral to the attended object predicted a decrease in the BOLD signal representing the unattended object. We also found that the BOLD signal in the dorsal attention network inversely correlated with visual alpha power. This is the first demonstration, to our knowledge, that oscillations in the alpha band are implicated in the gating of information from the visual cortex to the ventral stream, as reflected in the representationally specific BOLD signal. This link of sensory alpha to downstream activity provides a neurophysiological substrate for the mechanism of selective attention during stimulus processing, which not only boosts the attended information but also suppresses distraction. Although previous studies have shown a relation between the BOLD signal from the dorsal attention network and the alpha band at rest, we demonstrate such a relation during a visuospatial task, indicating that the dorsal attention network exercises top-down control of visual alpha activity.Johanna M ZumerRené ScheeringaJan-Mathijs SchoffelenDavid G NorrisOle JensenPublic Library of Science (PLoS)articleBiology (General)QH301-705.5ENPLoS Biology, Vol 12, Iss 10, p e1001965 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	Biology (General) QH301-705.5
spellingShingle	Biology (General) QH301-705.5 Johanna M Zumer René Scheeringa Jan-Mathijs Schoffelen David G Norris Ole Jensen Occipital alpha activity during stimulus processing gates the information flow to object-selective cortex.
description	Given the limited processing capabilities of the sensory system, it is essential that attended information is gated to downstream areas, whereas unattended information is blocked. While it has been proposed that alpha band (8-13 Hz) activity serves to route information to downstream regions by inhibiting neuronal processing in task-irrelevant regions, this hypothesis remains untested. Here we investigate how neuronal oscillations detected by electroencephalography in visual areas during working memory encoding serve to gate information reflected in the simultaneously recorded blood-oxygenation-level-dependent (BOLD) signals recorded by functional magnetic resonance imaging in downstream ventral regions. We used a paradigm in which 16 participants were presented with faces and landscapes in the right and left hemifields; one hemifield was attended and the other unattended. We observed that decreased alpha power contralateral to the attended object predicted the BOLD signal representing the attended object in ventral object-selective regions. Furthermore, increased alpha power ipsilateral to the attended object predicted a decrease in the BOLD signal representing the unattended object. We also found that the BOLD signal in the dorsal attention network inversely correlated with visual alpha power. This is the first demonstration, to our knowledge, that oscillations in the alpha band are implicated in the gating of information from the visual cortex to the ventral stream, as reflected in the representationally specific BOLD signal. This link of sensory alpha to downstream activity provides a neurophysiological substrate for the mechanism of selective attention during stimulus processing, which not only boosts the attended information but also suppresses distraction. Although previous studies have shown a relation between the BOLD signal from the dorsal attention network and the alpha band at rest, we demonstrate such a relation during a visuospatial task, indicating that the dorsal attention network exercises top-down control of visual alpha activity.
format	article
author	Johanna M Zumer René Scheeringa Jan-Mathijs Schoffelen David G Norris Ole Jensen
author_facet	Johanna M Zumer René Scheeringa Jan-Mathijs Schoffelen David G Norris Ole Jensen
author_sort	Johanna M Zumer
title	Occipital alpha activity during stimulus processing gates the information flow to object-selective cortex.
title_short	Occipital alpha activity during stimulus processing gates the information flow to object-selective cortex.
title_full	Occipital alpha activity during stimulus processing gates the information flow to object-selective cortex.
title_fullStr	Occipital alpha activity during stimulus processing gates the information flow to object-selective cortex.
title_full_unstemmed	Occipital alpha activity during stimulus processing gates the information flow to object-selective cortex.
title_sort	occipital alpha activity during stimulus processing gates the information flow to object-selective cortex.
publisher	Public Library of Science (PLoS)
publishDate	2014
url	https://doaj.org/article/fb8957e70ad04de19a4b8d188372e4f5
work_keys_str_mv	AT johannamzumer occipitalalphaactivityduringstimulusprocessinggatestheinformationflowtoobjectselectivecortex AT renescheeringa occipitalalphaactivityduringstimulusprocessinggatestheinformationflowtoobjectselectivecortex AT janmathijsschoffelen occipitalalphaactivityduringstimulusprocessinggatestheinformationflowtoobjectselectivecortex AT davidgnorris occipitalalphaactivityduringstimulusprocessinggatestheinformationflowtoobjectselectivecortex AT olejensen occipitalalphaactivityduringstimulusprocessinggatestheinformationflowtoobjectselectivecortex
_version_	1718414675436109824

Occipital alpha activity during stimulus processing gates the information flow to object-selective cortex.

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