Prof. Dr. Marcel Arnold is the Chairman of the Stroke Centre of the University Hopsital Berne and a University Professor of Clinical Neurology at the University of Berne, Switzerland. His main research area of interest is the pathogenesis, imaging, treatment and prognosis of ischaemic stroke. A special interest is dedicated to cervicocerebral artery dissections, advanced neuroimaging, cerebral venous thrombosis and to biomarkers in cerebrovascular diseases. He is the President of the Swiss Stroke Comission and the Vice-President of the Swiss Federation of Clinical Neurosocieties (SFCNS), the Co-Chairman of the International Study Group on Biomarkers in Cerebrovascular Diseases (IBCD) and a member of the European Stroke Organisation Trials Network Committee and Educational Committee.