Unmixing Oscillatory Brain Activity by EEG Source Localization and Empirical Mode Decomposition

Figure 2

The pipeline used to perform NA-MEMD of the source-localized cortical activity in the ROI. Either 1 or 4 sources are extracted from the ROI. In the experimental data, the estimated phase is correlated with the 1-D (trials) MEP intensities (denoted ) using the circular-linear correlation. In the simulations where the true signal is available, it is compared directly to the estimated signal, i.e., through calculating circular distance between the phase of the true () and estimated signal () in the frequency bands .