Fundamental Dynamical Modes Underlying Human Brain Synchronization

Figure 4

Global state space for 4 patients. For each patient, several characteristic clusters were identified by a hierarchical clustering algorithm and were coded by different colors (analyzed periods for patient 2: 103 hours; patient 3: 38.7 hours; patient 4: 86 hours; patient 5: 40 hours). The probabilities of transition between the different clusters are depicted using different arrow sizes (small: 0.2<𝑃<0.4 and large: 𝑃>0.4). Note that the global dynamic structures governing the trajectories across the state space are similar among all the different patients (insets: matrices of transition probabilities). In a comparable way, the color-coded spectral state spaces conserved three different segregated regions in the delta, alpha/beta, and gamma bands (first column).