Dissociated α-band modulations in the dorsal and ventral visual pathways in visuospatial attention and perception

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dc.contributor.author Capilla, Almudena es_ES
dc.contributor.author Schoffelen, Jan-Mathijs de_DE
dc.contributor.author Paterson, Gavin en_US
dc.contributor.author Thut, Gregor en_US
dc.contributor.author Gross, Joachim en_US
dc.contributor.other UAM. Departamento de Psicología Biológica y de la Salud es_ES
dc.date.accessioned 2015-04-20T15:36:35Z
dc.date.available 2015-04-20T15:36:35Z
dc.date.issued 2014-02-01 es_ES
dc.identifier.citation Cerebral Cortex 24.2 (2014): 550-561 en_US
dc.identifier.issn 1047-3211 (print) es_ES
dc.identifier.issn 1460-2199 (online) es_ES
dc.identifier.uri http://hdl.handle.net/10486/665304 en_US
dc.description This is a pre-copyedited, author-produced PDF of an article accepted for publication in Cerebral Cortex following peer review. The version of record Cerebral Cortex 24.2 (2014): 550-561 is available online at: http://cercor.oxfordjournals.org/ en_US
dc.description.abstract Modulations of occipito-parietal α-band (8–14 Hz) power that are opposite in direction (α-enhancement vs. α-suppression) and origin of generation (ipsilateral vs. contralateral to the locus of attention) are a robust correlate of anticipatory visuospatial attention. Yet, the neural generators of these α-band modulations, their interdependence across homotopic areas, and their respective contribution to subsequent perception remain unclear. To shed light on these questions, we employed magnetoencephalography, while human volunteers performed a spatially cued detection task. Replicating previous findings, we found α-power enhancement ipsilateral to the attended hemifield and contralateral α-suppression over occipitoparietal sensors. Source localization (beamforming) analysis showed that α-enhancement and suppression were generated in 2 distinct brain regions, located in the dorsal and ventral visual streams, respectively. Moreover, α-enhancement and suppression showed different dynamics and contribution to perception. In contrast to the initial and transient dorsal α-enhancement, α-suppression in ventro-lateral occipital cortex was sustained and influenced subsequent target detection. This anticipatory biasing of ventrolateral extrastriate α-activity probably reflects increased receptivity in the brain region specialized in processing upcoming target features. Our results add to current models on the role of α-oscillations in attention orienting by showing that α-enhancement and suppression can be dissociated in time, space, and perceptual relevance. en_US
dc.description.sponsorship This work was supported by the Wellcome Trust (084067, 091928), the UK’ Economical and Social Research Council (ESRC) and Medical Research Council (MRC), and the Spanish Ministry of Science and Innovation (2008-0168 Postdoctoral Fellowship to A.C.). en_US
dc.format.extent 12 pag. es_ES
dc.format.mimetype application/pdf en_US
dc.language.iso eng en_US
dc.publisher Oxford University Press en_US
dc.relation.ispartof Cerebral Cortex en_US
dc.rights © The Author 2012. Published by Oxford University Press. All rights reserved. es_ES
dc.subject.other Alpha es_ES
dc.subject.other Beamforming en_US
dc.subject.other Brain oscillations en_US
dc.subject.other Magnetoencephalography en_US
dc.subject.other Spatial orienting en_US
dc.title Dissociated α-band modulations in the dorsal and ventral visual pathways in visuospatial attention and perception en_US
dc.type article en_US
dc.subject.eciencia Psicología es_ES
dc.relation.publisherversion http://dx.doi.org/10.1093/cercor/bhs343 en_US
dc.identifier.doi 10.1093/cercor/bhs343 es_ES
dc.identifier.publicationfirstpage 550 es_ES
dc.identifier.publicationissue 2 es_ES
dc.identifier.publicationlastpage 561 es_ES
dc.identifier.publicationvolume 24 es_ES
dc.relation.projectID Gobierno de España. 2008-0168 Postdoctoral Fellowship to Almudena Capilla es_ES
dc.type.version info:eu-repo/semantics/acceptedVersion es_ES
dc.rights.accessRights openAccess en_US
dc.authorUAM Capilla González, Almudena (262256)


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