This volume outlines and examines current understanding of botulinum toxin and its various therapeutic applications. It presents therapeutic uses across a variety of medical subspecialties and patient populations. Each chapter focuses on a particular symptom and explains how botulinum toxin is currently used for treatment. Coverage also examines questions of immunity and explores ecomic issues. Written by leaders in their fields respected for their progressive approach to treatment, the book encourages responsible research into new and vel uses of botulinum toxin.