Whole brain functional connectivity: Insights from next generation neural mass modelling incorporating electrical synapses
Fig 5
Example timeseries for local excitatory population variables, VE, RE and synchrony |ZE| obtained via direct simulation of the network model (7)–(10), employing connectomic and delay data described in Section Structural connectivity and path-length data. Note only results from 3 selected nodes are shown, for clarity. The left pericalcarine cortex [node 20] (blue), left supramarginal gyrus [node 30] (red) and right fusiform gyrus [node 40] (yellow). (a), (c) and (e) show the amplitude envelope of the whole timeseries for each variable, given by the absolute value of the Hilbert-transformed signal. Within the time intervals indicated by the inset purple boxes, (b), (d) and (f) show a sample of the raw timeseries. Panel (g) shows a synthetic BOLD signal, computed via (17) from the RE(t) timeseries.