This UCLA research study, conducted by Drs. John Piacentini and James McCracken, is investigating how the brain works in people with tics. We are working with doctors across the country on this brain imaging research study. We are seeking help from children and adolescents ages 8-21 with a lifetime diagnosis of Tourette Syndrome or other chronic tic disorders. Participation involves a diagnostic interview, memory and thinking tests, questionnaires, and an MRI scan. Please call (310) 825-2064 or email firstname.lastname@example.org for more information.