1. Referral Centre for Neuromuscular Diseases and ALSHôpital La Timone Marseille France
2. Department of RadiologyInstitute for Locomotion, Hôpital Sainte‐Marguerite Marseille France
3. Aix‐Marseille University, Timone Neuroscience Institute, UMR CNRS 7289 Marseille France