refers to, not one, but a group of muscle diseases. These diseases have three features in common: they are hereditary; they are progressive; and each causes a characteristic and selective pattern of weakness. Duchenne (DMD) is the most prevalent and severe childhood form of this group of diseases. Each form of is caused by a defect in a specific gene. In 1986, scientists discovered exactly which piece of genetic material is missing in Duchenne patients. They named it for Guillaume Benjamin Amand Duchenne(1806-1875), a French neurolog ....