Parkinson's disease affects movement, causing tremors, slow movements, and muscle stiffness. Deep Brain Stimulation (DBS) is a therapy where a device sends electrical signals to the brain to help with these symptoms. Adaptive DBS (aDBS) is a new kind of DBS that changes the signals based on what the brain is doing at the time, like walking or sitting. This study wants to see if aDBS can help with walking issues in Parkinson's patients.

The study will take place at CHUV over about five weeks. It has three phases:

• Phase 1: Check if aDBS is suitable for you (1 day).
• Phase 2: Set up and test aDBS over 2-3 days within 10 days.
• Phase 3: Evaluate its effectiveness and safety.

Key Points:

• You must be diagnosed with Parkinson's and have specific DBS equipment.
• You will need to visit CHUV over several days.
• You must be able to understand French and follow study instructions.