Summary of behavioral measurements for Parkinson’s patients in each DBS condition and for healthy controls in no-stop trials and in go-only trials.

In all cases the average values ±SEM are reported. Accuracy was computed as the percentage of correct responses with respect to the sum of correct plus incorrect responses. Incorrect trials were either those in which subjects touched the target outside the tolerance window or those whose RTs exceeded the upper RT (overreach trials). The percentage of overreach trials was computed with respect to the sum of correct plus incorrect responses.