Abstract:
: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.
journal_name
Psychophysiologyjournal_title
Psychophysiologyauthors
Cosmelli D,López V,Lachaux JP,López-Calderón J,Renault B,Martinerie J,Aboitiz Fdoi
10.1111/j.1469-8986.2010.01066.xsubject
Has Abstractpub_date
2011-03-01 00:00:00pages
312-22issue
3eissn
0048-5772issn
1540-5958pii
PSYP1066journal_volume
48pub_type
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