The purpose of this study is to identify new genes responsible for neuromuscular disorders and study muscle tissue of patient with known neuromuscular disease, as well as their family members. We are interested in recruiting many types of neuromuscular disease including; Duchenne muscular dystrophy (DMD), Becker muscular dystrophy (BMD), and limb-girdle muscle dystrophy (LGMD). There are still many patients diagnosed with muscular dystrophy with no causative gene implicated in their disease. Using molecular genetics to unravel basis of these neuromuscular disorders will lead to more accurate diagnosis/prognosis of these disorders which will lead to potential therapies.