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Shifting visual attention away from fixation is specifically associated with alpha band activity over ipsilateral parietal regions
Author(s) -
Cosmelli Diego,
López Vladimir,
Lachaux JeanPhilippe,
LópezCalderón Javier,
Renault Bernard,
Martinerie Jacques,
Aboitiz Francisco
Publication year - 2011
Publication title -
psychophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.661
H-Index - 156
eISSN - 1469-8986
pISSN - 0048-5772
DOI - 10.1111/j.1469-8986.2010.01066.x
Subject(s) - psychology , alpha (finance) , fixation (population genetics) , covert , electroencephalography , negativity effect , audiology , contingent negative variation , cognitive psychology , neuroscience , developmental psychology , chemistry , medicine , construct validity , biochemistry , linguistics , philosophy , gene , psychometrics
We studied brain activity during the displacement of attention in a modified visuo‐spatial orienting paradigm. Using a behaviorally relevant no‐shift condition as a control, we asked whether ipsi‐ or contralateral parietal alpha band activity is specifically related to covert shifts of attention. Cue‐related event‐related potentials revealed an attention directing anterior negativity (ADAN) contralateral to the shift of attention and P3 and contingent negative variation waveforms that were enhanced in both shift conditions as compared to the no‐shift task. When attention was shifted away from fixation, alpha band activity over parietal regions ipsilateral to the attended hemifield was enhanced relative to the control condition, albeit with different dynamics in the upper and lower alpha subbands. Contralateral‐to‐attended parietal alpha band activity was indistinguishable from the no‐shift task.