Craniocervical dystonia, characterized by symptoms distributed in the craniofacial and/or cervical regions, is a type of focal or segmental dystonia and is the most common form of dystonia in adults. Deep brain stimulation (DBS) is a significant therapeutic approach for medically refractory craniocervical dystonia. The commonly utilized DBS targets are the Globus Pallidus internus (GPi) and the Subthalamic Nucleus (STN). Current research indicates no significant difference in efficacy between these two targets, although there are some differences in the onset time, stimulation voltage, and complications. Studies utilizing magnetic resonance imaging (MRI) to assess brain activity differences in patients with dystonia have found that patients exhibit increased activity and enhanced plasticity across a broad range of brain regions, including the brainstem, cortex, subcortical structures, and the basal ganglia, among others. Consequently, an increasing number of studies are classifying dystonia within the spectrum of brain network disorders. This study aims to recruit patients with craniocervical dystonia who meet the inclusion criteria, randomly assigning them into two groups of 30 patients each. One group will receive stimulation targeting the STN, and the other will target the GPi. Using functional MRI, researcher will conduct a dynamic brain network analysis to explore the differences in the brain network mechanisms underlying the treatment of craniocervical dystonia patients between the STN and GPi targets.