Dynamics underlying spontaneous human alpha oscillations: a data-driven approach.

R. Hindriks, F. Mone-Bijma, Y.D. van der Werf, E.J.W. van Someren, A.W. van der Vaart, B.W. van Dijk

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13 Citations (Scopus)

Abstract

Although the cognitive and clinical correlates of spontaneous human alpha oscillations as recorded with electroencephalography (EEG) or magnetoencephalography (MEG) are well documented, the dynamics underlying these oscillations is still a matter of debate. This study proposes a data-driven method to reveal the dynamics of these oscillations. It demonstrates that spontaneous human alpha oscillations as recorded with MEG can be viewed as noise-perturbed damped harmonic oscillations. This provides evidence for the hypothesis that these oscillations reflect filtered noise and hence do not possess limit-cycle dynamics. To illustrate the use of the model, we apply it to two data-sets in which a decrease in alpha power can be observed across conditions. The associated differences in the estimated model parameters show that observed decreases in alpha power are associated with different kinds of changes in the dynamics. Thus, the model parameters are useful dynamical biomarkers for spontaneous human alpha oscillations. © 2011 Elsevier Inc.
Original languageEnglish
Pages (from-to)440-451
Number of pages11
JournalNEUROIMAGE
Volume57
Issue number2
DOIs
Publication statusPublished - 2011

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