Figure 1.

Schematic of a typical trial: a warning cue with an arrow and coin signaled the complexity and reward of an upcoming trial. The presentation of a gold or gray arrow instructed high or low trial complexity, while the presentation of a gold or gray coin signaled high or low reward, respectively. Patients were instructed to move the highlighted body segment only when the warning cue signaled low trial complexity. In the case of a warning cue signaling high trial complexity, patients were instructed to move the limb diagonally opposite to the limb highlighted in red. For example, in high-complexity trials, if the left arm was highlighted, the correct response would be to move the right leg.