Cortically evoked potentials in the human subthalamic nucleus

► We hypothesize that DBS in the STN motor area gives the optimal effect for PD. ► We perform motor cortex stimulation and measure the evoked potentials in the STN. ► We hypothesize that the cortically evoked potentials can identify the STN motor area. ► Cortically evoked potentials follow a specific spatial and temporal pattern in the STN. ► The evoked subthalamic potentials are partly related to the unit responses.