1 Department of Neuromuscular Diseases, CHRU Besançon, University of Franche-Comté, 3 boulevard Fleming, 25000, Besançon, France. laurent.tatu@univ-fcomte.fr.
2 Department of Anatomy, University of Franche-Comté, Besançon, France. laurent.tatu@univ-fcomte.fr.
3 Department of Neurology, CHRU Besançon, Besançon, France.
4 Department of Rehabilitation, Hôpital du Jura, Porrentruy, Switzerland.