In vivo assessment of human brain oscillations during application of transcranial electric currents

Surjo R. Soekadar (), Matthias Witkowski, Eliana G. Cossio, Niels Birbaumer, Stephen E. Robinson and Leonardo G. Cohen
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Surjo R. Soekadar: Human Cortical Physiology and Stroke Neurorehabilitation Section, National Institute of Neurological Disorders and Stroke, NIH, 10 Center Drive, Building 10
Matthias Witkowski: Human Cortical Physiology and Stroke Neurorehabilitation Section, National Institute of Neurological Disorders and Stroke, NIH, 10 Center Drive, Building 10
Eliana G. Cossio: University Hospital of Tübingen, Applied Neurotechnology Lab, Calwerstr. 14
Niels Birbaumer: University of Tübingen, Institute of Medical Psychology and Behavioral Neurobiology, Silcherstrasse 5
Stephen E. Robinson: MEG Core Facility, National Institute of Mental Health, NIH, 10 Center Drive, Building 10
Leonardo G. Cohen: Human Cortical Physiology and Stroke Neurorehabilitation Section, National Institute of Neurological Disorders and Stroke, NIH, 10 Center Drive, Building 10

Nature Communications, 2013, vol. 4, issue 1, 1-10

Abstract: Abstract Brain oscillations reflect pattern formation of cell assemblies’ activity, which is often disturbed in neurological and psychiatric diseases like depression, schizophrenia and stroke. In the neurobiological analysis and treatment of these conditions, transcranial electric currents applied to the brain proved beneficial. However, the direct effects of these currents on brain oscillations have remained an enigma because of the inability to record them simultaneously. Here we report a novel strategy that resolves this problem. We describe accurate reconstructed localization of dipolar sources and changes of brain oscillatory activity associated with motor actions in primary cortical brain regions undergoing transcranial electric stimulation. This new method allows for the first time direct measurement of the effects of non-invasive electrical brain stimulation on brain oscillatory activity and behavior.

Date: 2013
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DOI: 10.1038/ncomms3032

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