FIGURE 4.
Expression of structural eigenmodes during time‐resolved phase coupling. Panel (a) shows a short epoch of the fluctuating proportion of the explained variance R 2 of dynamic functional by the linear combination of structural eigenmodes for the different frequency bands (colours as in b). Panel (b) shows violin plots for R 2 values across all participants and recording, together with the R 2 values for surrogate data and R 2 values obtained from the prediction of dynamic functional connectivity based on direct structural connections (individual connectome). The eigenmode results are illustrated based on individual eigenmodes and group average obtained eigenmodes. Panel (c) shows some examples of empirical and predicted time‐varying functional connectivity matrices. Panel (d) shows the correlation between mean and SD of the R 2 and cognitive performance. Panels (e, f, g) show the power spectral densities of the time‐series of eigenmodes R 2 for genuine data, community structure Q and average functional connectivity, all averaged over subjects. Panel (h) shows a distribution of moderate correlations between the expression of the eigenmodes over time and fluctuations of community structure across all frequency bands. Panel (i) shows subject wise correlations for the goodness‐of‐fit and the cosine of the angle between the degree vector and the vector encompassing the exponential of the phase derivative across all regions. A dot in (h, i) corresponds to a correlation for a single subject.