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. 2013 Apr 2;14:43. doi: 10.1186/1471-2202-14-43

Figure 2.

Figure 2

The effects of voluntary muscle contraction on MEP amplitude and CSP duration. (a) The MEP amplitude induced at 30%, 50%, and 70% EMG was significantly larger than that induced at 10% EMG. The MEP amplitude induced at 50% and 70% EMG was significantly larger than that induced at 30% EMG. (b) CSP duration was not significantly influenced by background contraction.