Fig. 2.
Acute effects of 4 interventions on the size of motor-evoked potentials (MEPs) in session 1, session 5, and session 10. The interventions were voluntary strength training of the right FDI (Vol), voluntary strength training combined with sham rTMS at 1 Hz (Vol+Sham), voluntary strength training combined with 1 Hz rTMS (Vol+rTMS), and rTMS only without strength training (rTMS_only). •, Data collected before an intervention; ○, data collected immediately after the completion of an intervention within a given session. x-Axis: TMS stimulation intensity normalized to the individual MEP threshold determined before a given intervention in session 1. y-Axis: MEP amplitude (means ± SE) normalized to individual maximum action potential amplitude (Mmax) established before a given intervention in each session. There were no changes in the control group, and these data are not shown. *P < 0.05 based on Tukey's post hoc contrast. These data compare the acute effects of a particular intervention within a session.