According to Dr. Luc J. Hébert’s interim report , “it is becoming increasingly clear that in patients with ARSACS, the presence of inappropriate knee cocontractions is a major factor in mobility restrictions.” Dr. Hébert is the researcher responsible for the project “Caractérisation des déficiences musculaires associées aux difficultés à la marche et aux transferts chez des personnes atteintes d’ARSACS ; de la cellule à la fonction” Note: The interim report is available in French only.