Carlo Miniussi is an Associate Professor of Human Physiology at the Department of Biomedical Sciences and Biotechnologies, School of Medicine, University of Brescia, Italy. Walter Paulus is a Professor of Clinical Neurophysiology and Head of the Department of Clinical Neurophysiology at Georg-August University in Gottingen, Germany. Paolo M. Rossini is a Professor of Clinical Neurology at the University of Campus Biomedico in Rome, Italy.