Name
Title | ||
|---|---|---|
Third order spectral analysis robust to mixing artifacts for mapping cross-frequency interactions in EEG/MEG. |
Abstract | ||
|---|---|---|
We present a novel approach to the third order spectral analysis, commonly called bispectral analysis, of electroencephalographic (EEG) and magnetoencephalographic (MEG) data for studying cross-frequency functional brain connectivity. The main obstacle in estimating functional connectivity from EEG and MEG measurements lies in the signals being a largely unknown mixture of the activities of the underlying brain sources. This often constitutes a severe confounder and heavily affects the detection of brain source interactions. To overcome this problem, we previously developed metrics based on the properties of the imaginary part of coherency. Here, we generalize these properties from the linear to the nonlinear case. Specifically, we propose a metric based on an antisymmetric combination of cross-bispectra, which we demonstrate to be robust to mixing artifacts. Moreover, our metric provides complex-valued quantities that give the opportunity to study phase relationships between brain sources. |
Year | DOI | Venue |
|---|---|---|
2014 | 10.1016/j.neuroimage.2013.12.064 | NeuroImage |
Keywords | Field | DocType |
Functional connectivity,Cross-frequency interactions,Higher order spectral analysis,Bispectrum,Brain networks,Volume conduction | Brain mapping,Developmental psychology,Nonlinear system,Bispectrum,Resting state fMRI,Psychology,Antisymmetric relation,Magnetoencephalography,Electroencephalography,Bispectral analysis | Journal |
Volume | ISSN | Citations |
91 | 1053-8119 | 9 |
PageRank | References | Authors |
0.89 | 17 | 5 |
Name | Order | Citations | PageRank |
|---|---|---|---|
| F Chella | 1 | 9 | 0.89 |
| Laura Marzetti | 2 | 122 | 9.39 |
| V Pizzella | 3 | 200 | 24.54 |
| Filippo Zappasodi | 4 | 53 | 10.43 |
| Guido Nolte | 5 | 51 | 4.39 |