Nonlinear origin of SSVEP spectra: a combined experimental and modeling study

Labecki, Maciej, Kus, Rafal, Brzozowska, Alicja, Stacewicz, Tadeusz, Bhattacharya, Basabdatta S. and Suffczynski, Piotr (2016) Nonlinear origin of SSVEP spectra: a combined experimental and modeling study. Frontiers in Computational Neuroscience, 10 . ISSN 1662-5188

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Abstract

Steady state visual evoked potentials (SSVEPs) are steady state oscillatory potentials elicited in the electroencephalogram (EEG) by flicker stimulation. The frequency of these responses maches the frequency of the stimulation and of its harmonics and subharmonics. In this study, we investigated the origin of the harmonic and subharmonic components of SSVEPs, which are not well understood. We applied both sine and square wave visual stimulation at 5 and 15 Hz to human subjects and analyzed the properties of the fundamental responses and harmonically related components. In order to interpret the results, we used the well-established neural mass model that consists of interacting populations of excitatory and inhibitory cortical neurons. In our study, this model provided a simple explanation for the origin of SSVEP spectra, and showed that their harmonic and subharmonic components are a natural consequence of the nonlinear properties of neuronal populations and the resonant properties of the modeled network. The model also predicted multiples of subharmonic responses, which were subsequently confirmed using experimental data.

Keywords:Neural networks, NotOAChecked
Subjects:F Physical Sciences > F350 Medical Physics
Divisions:College of Science > School of Engineering
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ID Code:27987
Deposited On:08 Aug 2017 11:36

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