Shifting visual attention away from fixation is specifically associated with alpha band activity over ipsilateral parietal regions

Authors

  • Diego Cosmelli,

    1. Escuela de Psicología, Pontificia Universidad Católica de Chile, Santiago, Chile
    2. Centro Interdisciplinario de Neurociencia, Pontifica Universidad Católica de Chile, Santiago, Chile
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  • Vladimir López,

    1. Escuela de Psicología, Pontificia Universidad Católica de Chile, Santiago, Chile
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  • Jean-Philippe Lachaux,

    1. Unité 280, INSERM 151, Lyon, France
    2. Université Lyon 1, Lyon, France
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  • Javier López-Calderón,

    1. Center for Mind and Brain, University of California, Davis, Davis, California, USA
    2. Laboratorio de Neurociencia Cognitiva, Departamento de Psiquiatría, Escuela de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
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  • Bernard Renault,

    1. UPMC Université Paris 06, UMR 7225, UMR-S 975, Centre de Recherche de l'Institut Cerveau-Moelle (CRICM), Paris, France
    2. CNRS, UMR 7225, CRICM, Paris, France
    3. INSERM, UMR-S 975, CRICM, Paris, France
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  • Jacques Martinerie,

    1. UPMC Université Paris 06, UMR 7225, UMR-S 975, Centre de Recherche de l'Institut Cerveau-Moelle (CRICM), Paris, France
    2. CNRS, UMR 7225, CRICM, Paris, France
    3. INSERM, UMR-S 975, CRICM, Paris, France
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  • Francisco Aboitiz

    1. Centro Interdisciplinario de Neurociencia, Pontifica Universidad Católica de Chile, Santiago, Chile
    2. Laboratorio de Neurociencia Cognitiva, Departamento de Psiquiatría, Escuela de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
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  • 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.

Address correspondence to: Diego Cosmelli, Escuela de Psicología, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, Macul, Santiago de Chile, Chile. E-mail: dcosmelli@uc.cl

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.

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