Surgical procedure
A magnetic resonance image (MRI) scan was performed using a computerized navigational system to identify the target structure, and a trajectory was chosen. Two DBS electrodes were bilaterally implanted in the area of the MFB (Medtronic model 3389) in the posteromedial hypothalamic area just anterior of the red nucleus, and two electrodes in the area of the BNST (Medtronic model 3387). After the procedure, the electrode positions were verified with a postoperative computed tomography scan fused with the preoperative stereotactic MRI (Figure 1).