Overview Effects of Dexmedetomidine on Activity in the Subthalamic Nucleus Status: Completed Trial end date: 2015-06-01 Target enrollment: Participant gender: Summary The purpose of this research study is to find out whether dexmedetomidine changes brain cell activity in the subthalamic nucleus (STN). Phase: Phase 4 Details Lead Sponsor: University of Wisconsin, MadisonTreatments: Dexmedetomidine