A, SICF was enhanced after QPS-5 ms. SICI, ICF nor LICI were altered by QPS-5 ms priming over SMA alone. B, SICF was suppressed after QPS-50 ms over SMA, whereas others were not altered. Baseline (white bars); post 1 (grey bars), 0–6 min after QPS; post 2 (black bars), 20–26 min after QPS over SMA. *P < 0.05 by post hoc Dunnett's test.