Amazon.com description: Product Description: The Perspectives on Diseases and Disorders series provides clear, careful explanations that offer readers insight into what these conditions are, what causes them, how people live with them, and the latest information about treatment and prevention.; This new volume in the Perspectives on Diseases & Disorders series provides an overview of Lou Gehrig's Disease (ALS), including diagnosis, prevention, and current research; a look at controversies surrounding ALS, including the theories of head trauma or; Each volume in this timely series provides essential information on a disease or disorder (including symptoms, causes, treatments and cures); presents the controversies surrounding causes, alternative treatments, and other issues; and offers first-person