Flowchart of MRI protocols available for data processing between 2011 and 2016. N represents number of individuals in that group. Study population of interest (*) was those individuals who underwent STN-DBS, were able to complete MRI, and had pre and post-DBS neurobehavioral scores available (32 cases). Abbreviations: Deep brain stimulation (DBS), Essential tremor (ET), Globus pallidus internus (GPi), Subthalamic nucleus (STN), Obsessive compulsive behavior (OCD), Restless legs syndrome (RLS).