Animals, Blotting, Western, Connectin, Diaphragm, Disease Models, Animal, Mice, Mice, Mutant Strains, Muscle Contraction, Muscle Proteins, Muscle Strength, Muscular Dystrophy, Animal, Mutation, Myofibrils, Myosin Heavy Chains, Myositis, Protein Kinases, Time Factors, Tomography, X-Ray Computed