Vision Res. 2009 May;49(9):931-42. Epub 2009 Mar 24.

Tactile stimulation accelerates behavioral responses to visual stimuli through enhancement of occipital gamma-band activity.

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Donders Institute for Brain, Cognition and Behaviour, Radboud University Nijmegen, Nijmegen, The Netherlands.

Abstract

We investigated how responses of occipital cortex to visual stimuli are modulated by simultaneously presented tactile stimuli. Magnetoencephalography was recorded while subjects performed a simple reaction time task. Presence of a task-irrelevant tactile stimulus leads to faster behavioral responses and earlier and stronger gamma-band synchronization in occipital cortex, irrespective of the relative location of the tactile stimulus. While also other stimulus related responses in occipital cortex were modulated (alpha-band and evoked responses in parieto-occipital region), correlation-analysis revealed induced gamma-band activity to be the best predictor of the faster behavioral response latencies, suggesting a key-role of oscillatory activity for cross-modal integration.

PMID:: 19324067; [PubMed - indexed for MEDLINE]

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Tactile stimulation accelerates behavioral responses to visual stimuli through enhancement of occipital gamma-band activity.

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