Overview: My research is focused on the effects of deep brain stimulation(DBS) on patients' motor symptoms one year after DBS implantation. I will be working with Dr. Jill Ostrem at UCSF and analyze data on a new database called DBS Connect. I will be looking at data of a specific cohort of UCSF patients who have had DBS. I will be looking at their data on motor symptoms from before getting DBS to one year after DBS and seeing wether there are improvments or if there are areas of weakness.