Fig. 2: Effective connectivity in prefrontal cortex during walking tasks.

Effective connectivity value in prefrontal cortex (vertical axis) during normal walking and dual-task walking conditions (horizontal axis). The box represents lower quartile, median and upper quartile. Non-parametric two-way ANOVA indicated significant main effect for training (between patients and controls at baseline) and condition (between NW and DT). Wilcoxon signed-rank test indicated significant difference between NW and DT walking in patients at follow-up. ∗p < 0.05; white line (within the box): median level.