The purpose of this study is to determine if the study device is safe and effective for the treatment of subjects with advanced Parkinson's disease that is not adequately controlled by medication. The study will also evaluate changes in subjects' quality of life, dyskinesia (uncontrollable movements) severity, PD medications, and severity of other PD symptoms.
The study will last approximately 5 years.
The purpose of this research is to determine how to measure the severity of freezing of gait and its relationship to certain brain structures. Testing to assess Parkison's motor symptoms, and gait assessment in the motion analysis laboratory will be performed at each visit in conjunction with patient's self assessment questionnaires regarding their gait.