RIII reflex-related wind-up values.

One stimulation block included three phasic electrical stimulation series (wind-up). Each stimulation series comprised four electrical pulse trains (see Fig. 1B). The wind-up effects were calculated by substracting reflex-induced EMG-values obtained in response to the first pulse train from those obtained to the last (4th) one. The respective data were then averaged over the three stimulation series of each stimulation block and presented in percent difference (Δ%).
aPhasic electrical stimulation. Abbreviations: EMG = electromyography, AM = arithmetic mean, SEM = standard error of the mean, BL = Baseline, CS– = unpaired conditioned stimulus, CS+ = paired conditioned stimulus.