Xavier is neurologist, working as Professor at the Erasme Hospital, the academic hospital of the Université libre de Bruxelles (ULB, Brussels, Belgium). There, he is the Director of the Department of Functional Neuroimaging within the Service of Nuclear Medicine. Xavier is also Professor of Neuroanatomy at the ULB and senior researcher at the Laboratoire de Cartographie fonctionnelle du Cerveau of the ULB Neuroscience Institute. Together with his multidisciplinary team, he has built a comprehensive clinical program of functional neuroimaging dedicated to the presurgical functional mapping and the presurgical evaluation of refractory focal epilepsy. His main research interests focus on how the human brain cortical activity is entrained by sensory and motor processes as well as by cortico-cortical interactions.