A large amount of research has focussed on describing the distribution of weakness within the MDs associated with defects in the dystrophin-glycoprotein complex [2], namely Duchenne MD (DMD), Becker’s MD (BMD), Limb Girdle MD (LGMD) and Facioscapulohumeral MD (FSHD) [3–5]. Here, DMD is linked to facioscapulohumeral muscular dystrophy.