Provides a comprehensive discussion of tics and the associated behavioral disorders that often accompany chronic tic syndromes. The differential diagnosis and assessment of chronic tic disorders are discussed in detail, as are the state of the art neurobiology and the genetics and epidemiology, including the current work in progress that attempts to localize the gene for Tourette's syndrome. Other chapters discuss the clinical care of patients with tic disorders, including the pharmacological and nonpharmacological treatment and the approach to behavioral disorders of Tourette's syndrome. Special topics include future research into Tourette's and tic disorder syndromes, and the role of the Tourette Syndrome Association.