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

Capilla, A., Schoffelen, J.-M., Paterson, G., Thut, G., & Gross, J. (2014). Dissociated α-band modulations in the dorsal and ventral visual pathways in visuospatial attention and perception. Cerebral Cortex., 24(2), 550-561. doi:10.1093/cercor/bhs343.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-0010-1949-7 Version Permalink: https://hdl.handle.net/11858/00-001M-0000-002B-3039-3
Genre: Journal Article

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 Creators:
Capilla, Almudena1, 2, Author
Schoffelen, Jan-Mathijs3, 4, Author
Paterson, Gavin2, 5, Author
Thut, Gregor2, 5, Author
Gross, Joachim2, 5, Author
Affiliations:
1Department of Biological and Health Psychology, Autonoma University of Madrid, Madrid, Spain, ou_persistent22              
2Centre for Cognitive Neuroimaging (CCNi), Institute for Neuroscience and Psychology, University of Glasgow, Glasgow, UK, ou_persistent22              
3Neurobiology of Language Department, MPI for Psycholinguistics, Max Planck Society, ou_792551              
4Donders Institute for Brain, Cognition and Behaviour, External Organizations, ou_55236              
5School of Psychology, University of Glasgow, Glasgow, UK, ou_persistent22              

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 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.

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Language(s): eng - English
 Dates: 20122014
 Publication Status: Issued
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 Rev. Type: Peer
 Identifiers: DOI: 10.1093/cercor/bhs343
PMID: 23118197
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Title: Cerebral Cortex.
Source Genre: Journal
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Publ. Info: New York, NY : Oxford University Press
Pages: - Volume / Issue: 24 (2) Sequence Number: - Start / End Page: 550 - 561 Identifier: ISSN: 1047-3211
CoNE: https://pure.mpg.de/cone/journals/resource/954925592440