Figure 3.

Muscle activity during voluntary thumb movements. Mean (± SE) root-mean-square amplitude across subjects (N= 16) of the EMG activity during the initial 150 ms of the voluntary response, for each of the five precues and each of the three EMG channels.

van Elswijk et al. BMC Neuroscience 2008 9:51   doi:10.1186/1471-2202-9-51
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