Longitudinal Outcomes of DBS in PD

Patients will be recruited from review of movement disorders neurologists' outpatient census. All patients with PD two or more years status post DBS will be contacted via phone and/or mailed letter. Any interested patient will be mailed or e-mailed (via RedCAP) a copy of the study informed consent form. Willing patients will present to the Vanderbilt Movement Disorders Clinic for an opportunity to inquire further about the study and sign the informed consent form in person. Participants will have a single study visit, ideally coordinated with their regularly scheduled neurology follow-up. During the study visit, the following evaluations will be performed by a trained research assistant: Video-recorded UPDRS III BDI MMSE PDQ-39 In addition, current PD medications and number of falls in the past 6 months will be recorded. Assessments will occur in the on-medication, on-DBS state. The video-recorded UPDRS III will be reviewed and score at a subsequent date by a blinded rater (movement discord trained neurologist).