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Sci Rep. 2016 Sep 8;6:32775. doi: 10.1038/srep32775.

Oscillatory brain activity during multisensory attention reflects activation, disinhibition, and cognitive control.

Author information

1
University Medical Center Hamburg-Eppendorf, Department of Neurophysiology and Pathophysiology, Hamburg, Germany.
2
Institute of Cognitive Science, University of Osnabrück, Germany.

Abstract

In this study, we used a novel multisensory attention paradigm to investigate attention-modulated cortical oscillations over a wide range of frequencies using magnetencephalography in healthy human participants. By employing a task that required the evaluation of the congruence of audio-visual stimuli, we promoted the formation of widespread cortical networks including early sensory cortices as well as regions associated with cognitive control. We found that attention led to increased high-frequency gamma-band activity and decreased lower frequency theta-, alpha-, and beta-band activity in early sensory cortex areas. Moreover, alpha-band coherence decreased in visual cortex. Frontal cortex was found to exert attentional control through increased low-frequency phase synchronisation. Crossmodal congruence modulated beta-band coherence in mid-cingulate and superior temporal cortex. Together, these results offer an integrative view on the concurrence of oscillations at different frequencies during multisensory attention.

PMID:
27604647
PMCID:
PMC5015072
DOI:
10.1038/srep32775
[Indexed for MEDLINE]
Free PMC Article

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