He has implanted over 30 directional leads and his was one of the world’s first centres to implant and assess directional leads. He has also used intraoperative local field potential recording and other techniques to localise electrodes. Jan Vesper, MD, PhD, is professor of Functional Neurosurgery and Stereotaxy, University Clinic, Head of the Center of Neuromodulation, Düsseldorf, Germany. He is also president of the German Neuromodulation Society and a member of the German working group for Deep Brain Stimulation. In the 2017, he presented abstracts at the North American Neuromodulation Society annual meeting on the use of segmented DBS leads in Parkinson's disease and dystonia.