Indexing the graded allocation of visuospatial attention using anticipatory alpha oscillations.
Lateralization in the desynchronization of anticipatory occipitoparietal alpha (8-12 Hz) oscillations has been implicated in the allocation of selective visuospatial attention. Previous studies have demonstrated that small changes in the lateralization of alpha-band activity are predictive of behavi...
| Main Authors: | , , |
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| Format: | Journal article |
| Language: | English |
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2011
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| _version_ | 1826286061646512128 |
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| author | Gould, I Rushworth, M Nobre, A |
| author_facet | Gould, I Rushworth, M Nobre, A |
| author_sort | Gould, I |
| collection | OXFORD |
| description | Lateralization in the desynchronization of anticipatory occipitoparietal alpha (8-12 Hz) oscillations has been implicated in the allocation of selective visuospatial attention. Previous studies have demonstrated that small changes in the lateralization of alpha-band activity are predictive of behavioral performance but have not directly investigated how flexibly alpha lateralization is linked to top-down attentional goals. To address this question, we presented participants with cues providing varying degrees of spatial certainty about the location at which a target would appear. Time-frequency analysis of EEG data demonstrated that manipulating spatial certainty led to graded changes in the extent to which alpha oscillations were lateralized over the occipitoparietal cortex during the cue-target interval. We found that individual differences in alpha desynchronization contralateral to attention predicted reaction times, event-related potential measures of perceptual processing of targets, and beta-band (15-25 Hz) activity typically associated with response preparation. These results support the hypothesis that anticipatory alpha modulation is a plausible neural mechanism underlying the allocation of visuospatial attention and is under flexible top-down control. |
| first_indexed | 2024-03-07T01:38:12Z |
| format | Journal article |
| id | oxford-uuid:95ebc6d0-68fd-4a8c-b484-dfccb9c26b27 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T01:38:12Z |
| publishDate | 2011 |
| record_format | dspace |
| spelling | oxford-uuid:95ebc6d0-68fd-4a8c-b484-dfccb9c26b272022-03-26T23:49:32ZIndexing the graded allocation of visuospatial attention using anticipatory alpha oscillations.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:95ebc6d0-68fd-4a8c-b484-dfccb9c26b27EnglishSymplectic Elements at Oxford2011Gould, IRushworth, MNobre, ALateralization in the desynchronization of anticipatory occipitoparietal alpha (8-12 Hz) oscillations has been implicated in the allocation of selective visuospatial attention. Previous studies have demonstrated that small changes in the lateralization of alpha-band activity are predictive of behavioral performance but have not directly investigated how flexibly alpha lateralization is linked to top-down attentional goals. To address this question, we presented participants with cues providing varying degrees of spatial certainty about the location at which a target would appear. Time-frequency analysis of EEG data demonstrated that manipulating spatial certainty led to graded changes in the extent to which alpha oscillations were lateralized over the occipitoparietal cortex during the cue-target interval. We found that individual differences in alpha desynchronization contralateral to attention predicted reaction times, event-related potential measures of perceptual processing of targets, and beta-band (15-25 Hz) activity typically associated with response preparation. These results support the hypothesis that anticipatory alpha modulation is a plausible neural mechanism underlying the allocation of visuospatial attention and is under flexible top-down control. |
| spellingShingle | Gould, I Rushworth, M Nobre, A Indexing the graded allocation of visuospatial attention using anticipatory alpha oscillations. |
| title | Indexing the graded allocation of visuospatial attention using anticipatory alpha oscillations. |
| title_full | Indexing the graded allocation of visuospatial attention using anticipatory alpha oscillations. |
| title_fullStr | Indexing the graded allocation of visuospatial attention using anticipatory alpha oscillations. |
| title_full_unstemmed | Indexing the graded allocation of visuospatial attention using anticipatory alpha oscillations. |
| title_short | Indexing the graded allocation of visuospatial attention using anticipatory alpha oscillations. |
| title_sort | indexing the graded allocation of visuospatial attention using anticipatory alpha oscillations |
| work_keys_str_mv | AT gouldi indexingthegradedallocationofvisuospatialattentionusinganticipatoryalphaoscillations AT rushworthm indexingthegradedallocationofvisuospatialattentionusinganticipatoryalphaoscillations AT nobrea indexingthegradedallocationofvisuospatialattentionusinganticipatoryalphaoscillations |