1. a Neuroelectrical Imaging and BCI Lab, Fondazione Santa Lucia IRCCS , Rome , Italy
2. b Department of Computer and System Sciences , University of Rome ‘Sapienza’ , Rome , Italy
3. c Department of Psychology , University of Rome ‘Sapienza’ , Rome , Italy
4. d Department of Human Physiology and Pharmacology , University of Rome ‘Sapienza’ , Rome , Italy