This book presents muscular dystrophy (MD) as a group of genetic diseases with a worldwide occurrence of about 1 in 3,500 births that causes muscle wasting and weakening. It describes Duchenne MD as the most common type of MD, almost exclusively affecting males at a rate of about 1 in 5,000 boys, and eight rarer types of MD that are categorized by age of onset, muscles affected, disease progression, severity of symptoms, and health complications...