Understanding How Movements Are Transferred From Task to Task in Parkinson's Disease

This study is looking at how people with Parkinson's disease learn and transfer movement skills from one activity to another — for example, whether practicing walking on a special treadmill can help with everyday movement. Researchers want to understand if motor learning generalizes across different tasks. **You may be eligible if:** - You have been diagnosed with Parkinson's disease - You do not experience "freezing" (sudden inability to move) while walking - You can walk independently for 30 minutes without a cane or walker - You have no other neurological conditions - You have not previously used a split-belt treadmill - You have no significant balance, muscle, or joint problems - Your memory and thinking are intact (score of 25 or higher on a standard test) **You may NOT be eligible if:** - You have severe uncontrolled movements (dyskinesia) that affect your balance or walking - You are unable to walk safely on a treadmill - You have a deep brain stimulator implant - You have vision or hearing impairment - You have another neurological condition besides Parkinson's Talk to your doctor to see if this trial is right for you.