Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/30145
Appears in Collections:Psychology Journal Articles
Peer Review Status: Refereed
Title: Flicker-Driven Responses in Visual Cortex Change during Matched-Frequency Transcranial Alternating Current Stimulation
Author(s): Ruhnau, Philipp
Keitel, Christian
Lithari, Chrysa
Weisz, Nathan
Neuling, Toralf
Keywords: alpha rhythm
brain oscillation
entrainment
frequency tagging
MEG
NIBS
steady-state response
tACS
Issue Date: Apr-2016
Citation: Ruhnau P, Keitel C, Lithari C, Weisz N & Neuling T (2016) Flicker-Driven Responses in Visual Cortex Change during Matched-Frequency Transcranial Alternating Current Stimulation. Frontiers in Human Neuroscience, 10, Art. No.: 184. https://doi.org/10.3389/fnhum.2016.00184
Abstract: We tested a novel combination of two neuro-stimulation techniques, transcranial alternating current stimulation (tACS) and frequency tagging, that promises powerful paradigms to study the causal role of rhythmic brain activity in perception and cognition. Participants viewed a stimulus flickering at 7 or 11 Hz that elicited periodic brain activity, termed steady-state responses (SSRs), at the same temporal frequency and its higher order harmonics. Further, they received simultaneous tACS at 7 or 11 Hz that either matched or differed from the flicker frequency. Sham tACS served as a control condition. Recent advances in reconstructing cortical sources of oscillatory activity allowed us to measure SSRs during concurrent tACS, which is known to impose strong artifacts in magnetoencephalographic (MEG) recordings. For the first time, we were thus able to demonstrate immediate effects of tACS on SSR-indexed early visual processing. Our data suggest that tACS effects are largely frequency-specific and reveal a characteristic pattern of differential influences on the harmonic constituents of SSRs.
DOI Link: 10.3389/fnhum.2016.00184
Rights: Copyright © 2016 Ruhnau, Keitel, Lithari, Weisz and Neuling. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY - https://creativecommons.org/licenses/by/4.0/). The use, distribution and reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
Licence URL(s): http://creativecommons.org/licenses/by/4.0/

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