Scapuloperoneal Myopathy, X-Linked Dominant, also known as spm, is related to x-linked scapuloperoneal muscular dystrophy and pick disease of brain, and has symptoms including waddling gait An important gene associated with Scapuloperoneal Myopathy, X-Linked Dominant is FHL1 (Four And A Half LIM Domains 1). Affiliated tissues include skeletal muscle, and related phenotypes are elevated circulating creatine kinase concentration and foot dorsiflexor weakness