Cortical-Basal Ganglia Speech Networks

This study records brain activity during speech in patients who are already undergoing deep brain stimulation (DBS) surgery for movement disorders like Parkinson's disease, essential tremor, or dystonia. Researchers want to understand how the brain's speech networks interact with the basal ganglia (a region deep in the brain) to improve future treatments. **You may be eligible if...** - You are scheduled to have deep brain stimulation (DBS) surgery, as recommended by a specialist team - Your diagnosis is Parkinson's disease, essential tremor, or dystonia - You are between 18 and 85 years old - You can follow instructions and provide consent **You may NOT be eligible if...** - You have significant hearing loss - You are not an English speaker Talk to your doctor to see if this trial is right for you.