This study focuses on Parkinson's Disease (PD), a brain disorder that affects movement and other functions. Researchers have discovered a brain system called the **Somato-Cognitive Action Network (SCAN)**. They believe SCAN might play a key role in PD. To test this, they will use **magnetic resonance imaging (MRI)**, a special type of scan that takes pictures of the brain, to see if SCAN is connected to parts of the brain that are affected by PD. The goal is to find new ways to treat PD by understanding SCAN better. **Key Points:** - **Study Length & Visits:** The study will involve multiple visits for MRI scans, but the exact number isn't specified. - **Compensation:** Participants may receive compensation, but details are not provided. - **Risks:** Risks may include MRI-related issues such as claustrophobia, and exclusions apply for those with certain health conditions or metal implants. **Eligibility:** People with PD who don't have dementia, and healthy individuals without any neurological issues, can participate. Exclusions apply if there are other serious medical conditions or MRI restrictions.