One-Year Effect on Levodopa Equivalent Daily Dose of Thalamic VIM Nucleus Stimulation Compared to Subthalamic Nucleus Stimulation in Patients With Parkinson's Disease

This study compares the effects of deep brain stimulation (DBS) of the thalamic VIM nucleus versus the subthalamic nucleus (STN) on the levodopa equivalent daily dose (LEDD) in patients with Parkinson's disease. The goal is to determine whether VIM stimulation, typically used for tremor, can also reduce medication needs. It hypothesizes that STN stimulation leads to greater LEDD reduction, but VIM may offer moderate benefits in selected case