This booklet is intended to provide information to physicians, psychologists, nurses, and other professionals who wish to become more knowledgeable about Tourette Syndrome, a widely misunderstood neuropsychiatic (neurobehavioral) disorder. A Physician's Guide to Diagnosis and Treatment of Tourette Syndrome, published by the Tourette Syndrome Association, Inc. in 1984, provided the basic material that has been updated and expanded in scope for this edition.