sually worse in cold temperatures. Myotonic dystropy results from a gene flaw on chromosome 19, one of the autosomes. The gene containing the defect is for an enzyme recently named myotonin protein kinase.
             The disease causes muscle weakness and affect the central nervous system, heart, gastrointestinal tract, eyes (causing cataracts) and endocrine glands.
             2. Duchenne - The most common form found in children, Duchenne muscular dystrophy affects only males. It appears between the ages of 2 and 6. Early signs of Duchenne include frequent falling, difficulty getting up from a sitting or lying posi
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