F Duparc1, B Grignon2, D Kachlik3. 1. Laboratory of Anatomy, Rouen University, 22 Boulevard Gambetta, 76183, Rouen, France. fabrice.duparc@univ-rouen.fr. 2. Department of Anatomy, University of Lorraine, Avenue de la Forêt de Haye, 54505, Vandoeuvre-Les-Nancy, France. 3. Second Faculty of Medicine, Charles University, V Uvalu 84, 150 06, Prague, Czech Republic.