Indexing the graded allocation of visuospatial attention using anticipatory alpha oscillations. Gould, I., Rushworth, M., & Nobre, A. J Neurophysiol, 105(3):1318–26, 2011. ![Indexing the graded allocation of visuospatial attention using anticipatory alpha oscillations [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex 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.
@article{gould_indexing_2011,
title = {Indexing the graded allocation of visuospatial attention using anticipatory alpha oscillations},
volume = {105},
url = {http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=21228304},
doi = {10/bc2wsn},
abstract = {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.},
number = {3},
journal = {J Neurophysiol},
author = {Gould, I.C. and Rushworth, M.F. and Nobre, A.C.},
year = {2011},
keywords = {Adult, Alpha Rhythm/*physiology, Anticipation, Psychological/*physiology, Attention/*physiology, Biological Clocks/physiology, Evoked Potentials, Visual/*physiology, Humans, Male, Occipital Lobe/*physiology, Parietal Lobe/*physiology, Space Perception/*physiology},
pages = {1318--26},
}
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