Figure 6.

Spectral connectivity analysis for contrasting wiring diagrams between the concurrent force-matching and postural tasks in the level-surface and stabilometer conditions (threshold value = 0.3). (A) Synchronization likelihood in the theta band (4–8 Hz) that connects to the mid-frontal area (F_z and FC_z). (B) Synchronization likelihood in the upper alpha (10–13 Hz) and beta band (13–35 Hz) of recording electrodes that connect to the sensorimotor (C₃, C_z, C₄, CP₃, CP_z, and CP₄) and parietal-occipital (P₃, P_z, P₄, P₃, O₁, O_z, and O₂) areas (thin red line, stabilometer connectivity > level-surface connectivity, p < 0.05; bold red line, stabilometer connectivity of supra-threshold > level-surface connectivity of supra-threshold, p < 0.005; thin blue line, level-surface connectivity > stabilometer connectivity, p < 0.05; bold blue line, level-surface connectivity of supra-threshold > stabilometer connectivity of supra-threshold, p < 0.005).