Agonist-Antagonist Coactivation Enhances Corticomotor Excitability of Ankle Muscles

Figure 3

Effects of antagonist activation on change scores and trial-to-trial coefficient of variance of TA and soleus MEPs. The barplots on the left depict the between-condition MEP change scores for the TA (a) and soleus (c) muscles (means and standard errors across participants). For each muscle, 3 comparisons are depicted: (coactivation condition minus rest condition), (coactivation condition minus agonist activation condition), and (antagonist activation condition minus rest condition). The plots on the right depict the trial-to-trial coefficient of variation (CV) of MEP amplitudes for the TA (b) and soleus (d) muscles (means and standard errors across all study participants). Of the comparisons conducted (e.g., comparison between rest and agonist activation was not of interest in the current study), post hoc comparisons that showed a statistically significant difference are indicated by the symbol . Note that the agonist refers to the muscle of interest (i.e., for TA MEP data, TA is the agonist).

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