The authors thank Steven Hillyard for insightful comments on a previous version of this work. This work was supported by FONDECYT projects 3060094, 1090612, and PBCT-CONICYT PSD72.
Shifting visual attention away from fixation is specifically associated with alpha band activity over ipsilateral parietal regions
Article first published online: 19 JUL 2010
Copyright © 2010 Society for Psychophysiological Research
Volume 48, Issue 3, pages 312–322, March 2011
How to Cite
Cosmelli, D., López, V., Lachaux, J.-P., López-Calderón, J., Renault, B., Martinerie, J. and Aboitiz, F. (2011), Shifting visual attention away from fixation is specifically associated with alpha band activity over ipsilateral parietal regions. Psychophysiology, 48: 312–322. doi: 10.1111/j.1469-8986.2010.01066.x
- Issue published online: 9 FEB 2011
- Article first published online: 19 JUL 2010
- (Received October 30, 2009; Accepted March 31, 2010)
- Alpha band;
- Parietal cortex;
- Central cue
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.