Fig 3. Nodal average transmission costs for four increasingly biased routing strategies.

(a) Scatter plots show the transmission cost associated to each node when it acts as source (${\overrightarrow{C}}_{\lambda }^{trans}$) and target (${\overleftarrow{C}}_{\lambda }^{trans}$) during communication processes taking place under routing strategies generated with the values λ₁, λ₂, λ₃ and λ₄. (b) Scatter plots show the informational cost associated to each node when it acts as source (${\overrightarrow{C}}_{\lambda }^{info}$) and target (${\overleftarrow{C}}_{\lambda }^{info}$) during communication processes taking place under routing strategies generated with the values λ₁, λ₂, λ₃ and λ₄. Markers in the scatter plots in (a) and (b), representing each node, are colored according to the node’s membership in the 7 intrinsic connectivity networks (ICN) defined by Yeo et al. (2011) [71]: Visual (VIS), Somatomotor (SM), Dorsal Attention (DA), Ventral Attention (VA), Limbic (LIM), Frontal Parietal (FP), and Default Mode Network (DMN). The size of the markers is proportional to node’s strength. (c) Correlations between node strength and ${\overrightarrow{C}}_{\lambda }^{trans}$ (red), ${\overleftarrow{C}}_{\lambda }^{trans}$ (orange), ${\overrightarrow{C}}_{\lambda }^{info}$ (green) and ${\overleftarrow{C}}_{\lambda }^{info}$ (blue) as a function of λ. Solid lines show median correlation across all subjects, shaded areas surrounding the lines show 95^th percentile. Shaded colored areas between the vertical dashed lines indicate regions where the correlations were not significant (p > 0.001). (d) Correlation between ${\overrightarrow{C}}_{\lambda }^{trans}$ and ${\overleftarrow{C}}_{\lambda }^{trans}$ (red), and ${\overrightarrow{C}}_{\lambda }^{info}$ and ${\overleftarrow{C}}_{\lambda }^{info}$ (blue), as a function of λ. Solid lines show medians across all subjects and shaded areas surrounding solid lines show the 95^th percentile. Shaded areas between the vertical dashed lines indicate areas where correlation values were not significant (p > 0.001). In all panels, λ₁ = e^-4.49, λ₂ = e^-1.64, λ₃ = e^0.37 and λ₄ = e^1.79.