Narrow and wide field multi-electrode configurations. (A) Activation threshold values across 12 participants and 14 leg muscles (7 muscles on each side). (B) Slope of recruitment curve values across 12 participants and 14 leg muscles. (C) Activation threshold values across 12 participants, separated by proximal (GL, RF, VL, MH) and distal (SOL, MG, TA) muscles. (D) Slope of recruitment curve values across 12 participants, separated by proximal and distal muscles. P-values were obtained from linear contrasts built on an interaction term in a mixed linear model. This model includes a random intercept and slopes for configuration (local/global) and direction (rostral/caudal) for each participant. Independent variables in the model were muscle type (GL, MG, MH, RF, SOL, TA, VL), side (left/right), the interaction of process and direction and the interaction of muscle, configuration and direction. The linear contrasts, comparing two-by-two factor levels, were statistically evaluated with model-adjusted t-tests. The values of these tests as well as the degree of freedom for the overall model are included in the Supplementary material.