Understanding Motivation in Parkinson's Patients Through Neurophysiology

This study investigates how Parkinson's disease or dystonia (a movement disorder causing involuntary muscle contractions) affects motivation — the drive to initiate and sustain actions. Researchers record brain signals directly from implanted deep brain stimulation (DBS) devices to understand what happens in the brain during motivated behavior. **You may be eligible if...** - You have been diagnosed with Parkinson's disease or dystonia - You already have a Medtronic Percept or RC+S deep brain stimulation device implanted in the GPI or STN brain region - You are more than 1 month post-surgery and 18 or older **You may NOT be eligible if...** - You have severe cognitive impairment (MoCA score below 20) - You are pregnant - You are under 18 Talk to your doctor to see if this trial is right for you.