Fig. 1.

Graphic depiction of the DRT topography. The newly proposed (a) approach and the traditional approach (b) to the subthalamic nucleus (STN) with DRT (1) and STN (2) stimulation sites. Inset concept of the use of the octopolar electrode with STN stimulation at the tip (contacts 1–4) and DRT stimulation at the more proximal contacts (5–8). AC anterior commissure, PC posterior commissure, MCP mid-commissural point, MC primary motor cortex, m1, CST cortico-spinal tract, STP superior thalamic peduncle, DRT dentato-rubro-thalamic tract, thal thalamus, CI internal capsule, Vim ventral intermediate nucleus of thalamus stereotactic target (possibly this is the Vop ventralis oralis posterior nucleus), ml medial lemniscus, pSTR posterior subthalamic region, STN subthalamic nucleus, cZI caudal zona incerta, RN red nucleus, SNr substantia nigra, SCP superior cerebellar peduncle, DN entate nucleus