Cortical Electrophysiology of Response Inhibition in Parkinson's Disease

Participants will take levodopa in dosages prescribed by their care provider. Patients will be instructed to not take their regularly prescribed PD medications for 12 hours prior to the study assessment, as is typical for clinical evaluations in patients with PD. Participants will be tested in both levodopa-off (after 12 hours of not having medication) and levodopa-on states.

Deep brain stimulation performed with the patients' optimized clinical setting.

Deep brain stimulation performed with sham stimulation.

Deep brain stimulation performed to maximize the activation of the prefrontal cortico-STN projections.

Deep brain stimulation performed to minimize the activation of the prefrontal cortico-STN projections.