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Corticospinal excitability (CSE) at each time point during a trial, for each age group (Young vs. Older) and target hemisphere (D vs. ND). Line plots in different colours represent the different response conditions (selected vs. non-selected vs. bimanual vs. no response). The dashed line indicates CSE at rest. Error bars indicate 95%CIs. Abbreviations: D, dominant; ND, non-dominant; WS, warning signal; IS, imperative signal; 75%EMG, 75% of the time between IS onset and EMG onset.
