This study is for people with Parkinson's disease (PD) who are using a treatment called Deep Brain Stimulation (DBS). DBS involves a device placed in the brain to help control symptoms. Researchers want to test two different ways of using this device to see which works better for PD symptoms. The focus is on two brain pathways that affect movement and balance.

• The study lasts several weeks and involves observing participants over time to see how well the device settings work.
• Participants should be between 18-85 years old, have had DBS for at least 3 months, and be able to walk with assistance if needed.
• Participants cannot join if they have other significant movement issues, device problems, or if they are pregnant or nursing.

Participants will need to visit the lab and be monitored both at the lab and at home. This study could help improve treatments for PD in the future.