Figure 2.

Order and duration of events included in each experimental trial. The cue event at the beginning was always followed by an observation (video clip), a pause (fixation cross), a motor imagery (motor imagery of the movement seen in the preceding video clip), and a “baseline” event (fixation cross). Event duration was jittered to prevent correlation of event regressors. A reaction time task was included in the experiment to control for the subjects' alertness during the experiment (button press response upon detection of a checkerboard presented for 500 ms in 50% of the baseline events).