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. 2018 Dec 13;12:954. doi: 10.3389/fnins.2018.00954

Figure 1.

Figure 1

Methods and results. (A) EEG cap layout. Channels used for estimation of the individual spatial filters are marked with circles. Red circles indicate the channels used for determination of individual μ-peak-frequency. (B) Example 1/f-corrected spectrum used for determination of individual μ-peak frequency. Frequency bands used for the computation of SSD filters. Marked in yellow are the individual μ-peak frequency ±2 Hz, in gray the flanking noise frequency bands. (C) Example SSD spatial filter (right) computed from resting state EEG activity and the standard C3-centered Laplacian filter (left). (D) Group median MEP amplitudes for the respective filters, normalized by global median. p-values for Wilcoxon signed-rank test, multiple comparison corrected for the two types of filters, N = 15. (E) Modulation of MEP amplitudes by μ-phase as assessed by the N/P fraction for the respective filters, Laplace N/P-fraction vs. SSD N/P-fraction with 2.5–97.5th-percentile confidence intervals for each subject, N = 15.