Jan 30, 2015

Object-based attentional selection modulates anticipatory alpha oscillations

Frontiers in Human Neuroscience
Balázs KnakkerZoltán Vidnyánszky

Abstract

Visual cortical alpha oscillations are involved in attentional gating of incoming visual information. It has been shown that spatial and feature-based attentional selection result in increased alpha oscillations over the cortical regions representing sensory input originating from the unattended visual field and task-irrelevant visual features, respectively. However, whether attentional gating in the case of object based selection is also associated with alpha oscillations has not been investigated before. Here we measured anticipatory electroencephalography (EEG) alpha oscillations while participants were cued to attend to foveal face or word stimuli, the processing of which is known to have right and left hemispheric lateralization, respectively. The results revealed that in the case of simultaneously displayed, overlapping face and word stimuli, attending to the words led to increased power of parieto-occipital alpha oscillations over the right hemisphere as compared to when faces were attended. This object category-specific modulation of the hemispheric lateralization of anticipatory alpha oscillations was maintained during sustained attentional selection of sequentially presented face and word stimuli. These results imply ...Continue Reading

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Mentioned in this Paper

Alpha protein
Electroencephalography
Spatial Distribution
Face
Participant
Structure of Cortex of Kidney
Cerebral Cortex
Right Cerebral Hemisphere
Attention
Oscillations

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