A method for implanting a lead within brain tissue of a patient, wherein the lead comprises a set of radially segmented electrodes on a distal end of the lead is provided. The method includes performing a plurality of microelectrode recordings through a respective plurality of recording tracts in the brain tissue based on the microelectrode recordings, creating a three-dimensional map of a brain structure positioning a graphical representation of the radially segmented electrodes over the map of the brain structure to create a graphical depiction of a desired depth and a desired radial orientation of the lead within the brain tissue and implanting the lead in the brain tissue in accordance with the desired depth and desired radial orientation. A device for determining a radial orientation of the lead includes a radially directional ruler and an indicator for indicating which electrode is in contact with the ruler.
