Electromagnetic functional brain mapping in the presurgical evaluation of refractory focal epilepsy Tim Coolen 1,* , Alexandru M. Dumitrescu 1,* , Mathieu Bourguignon 1,2,3 , Vincent Wens 1,5 , Charline Urbain 1,4 & Xavier De Tiège 1,5 1 Laboratoire de Cartographie fonctionnelle du Cerveau, ULB Neuroscience Institute, Université libre de Bruxelles (ULB), Brussels, Belgium. 2 Laboratoire Cognition Langage et Développement, UNI – ULB Neuroscience Institute, Université libre de Bruxelles (ULB), Brussels, Belgium. 3 BCBL, Basque Center on Cognition, Brain and Language, 20009 San Sebastian, Spain. 4 Neuropsychology and Functional Neuroimaging Research Unit (UR2NF), ULB Neuroscience Institute, Université Libre de Bruxelles (ULB), Brussels, Belgium. 5 Department of Functional Neuroimaging, Service of Nuclear Medicine, CUB Hôpital Erasme, Université libre de Bruxelles, Brussels, Belgium. *These authors equally contributed to this work. Corresponding author : Xavier De Tiège, Department of Functional Neuroimaging, Service of Nuclear Medicine, CUB Hôpital Erasme, Université libre de Bruxelles, 808 Lennik Street, 1070 Brussels, Belgium. E-mail: xdetiege@ulb.ac.be Tel: +3225558962