Fig. 5.

Excitability changes and performance. Spearman’s Rank Correlations between excitability of the right FDI (rFDI) and reaction time (RT) are provided for a the right index finger movement (right response), b the left index finger movement (left response) 100 ms before the imperative signal, and c for the right response at the imperative signal (IS). Dots represent the young age group and squares, the old age group. ^*p < 0.05 and ^**p < 0.01