Spinal cord stimulation (SCS) is a treatment that uses small electrical signals to help reduce pain. It's often used when medicine doesn't help. In this study, doctors want to see if SCS can help people with advanced Parkinson's disease who have trouble walking because of a problem called nrFOG (non-responsive Freezing of Gait). This means their legs freeze up and they can't walk properly, even if they take their medicine. The study will use small, temporary electrodes placed near the spine to see if it helps improve walking and balance.

• Participants: Must be 40-85 years old and have Parkinson's for more than 5 years.
• Visits Needed: Involves having temporary electrodes placed by a doctor.
• Risks: Possible complications if there are infections or past surgeries near the spine.

This study is not for people with spinal cord injuries, atypical Parkinson's, or those who can control their gait with medicine. It also excludes those with certain medical conditions or allergies.