Histograms of the mean MEP amplitudes obtained with TMS at varying levels of muscle contraction. At 10% and 30% EMG, as well as at rest, MEP amplitudes induced by SICI were significantly reduced and those induced by ICF were significantly increased compared with those induced by single-pulse TMS (p < 0.05). At 50% EMG, the MEP amplitude induced by SICI was significantly reduced compared with that induced by single-pulse TMS (p < 0.05); however, the MEP amplitude induced by ICF was not significantly increased.
Kojima et al. BMC Neuroscience 2013 14:43 doi:10.1186/1471-2202-14-43