Comparison of output data from 1-year-old C57 and mdx mouse soleus muscle. (A) Mean of cross-sectional area of fibers in C57 and mdx muscle sections. (B) Standard deviation of CSA of fibers. (C) Mean of minimum Feret diameter (MFD) of fibers. (D) Standard deviation of MFD diameter. (E) Percentage of Type I fibers in C57 and mdx muscle sections. (F) The ratio of mean CSA of type I fibers to type II fibers. (G) The percentage of fibers with centrally nucleated fiber (CNF)s. (H) The mean CSA of mdx peripherally nucleated fibers (PNF) and CNFs. *P <0.05 for mdx compared to C57, † P <0.05 for CNFs compared to PNFs within the same muscle.