In the main experiment, motor-evoked potentials (MEPs) were recorded at all time points (circles; B0, B1-B2, P1-P9) with SI1mV, i.e. the stimulation intensity that evoked MEPs of, on average, 1mV peak-to-peak amplitude in the resting abductor pollicis brevis muscle at baseline (time point B0). Note that subjects took part in four experimental sessions in a crossover design with different intervals between the consecutive sessions of two identical LTP-like plasticity inducing PASLTP protocols (PAS1, PAS2): 10min (IPI10), 30min (IPI30), 60min (IPI60), and 180min (IPI180). In the control experiment (IPI30adj) SI1mV was readjusted at time point B2 to match baseline MEPs of 1mV peak-to-peak amplitude (SI'1mV). Otherwise, the control experiment was identical to the IPI30 condition of the main experiment.