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Trial design. Participants attempted or imagined grasping at a rate of 2 s/movement cycle paced. Fixation cross color indicated hand closing (i.e., flexion) or relaxing the hand to open. The expected position of the subject’s hand (if able to move overtly) is shown below the grasp and relax phases (not presented during the task). Each trial began with a 2-s preparation period (prep) and ended with a 5-s rest.
