Liam, 12-year-old male Patient: Liam, 12-year-old male Presenting Concerns: Frequent involuntary movements and vocalizations for the past year. Mother reports Liam makes sudden shoulder jerks and occasionally blurts out words. Symptoms worsen with stress. History: No substance use. No significant medical history. Provider Notes: Diagnosed with Tourette's disorder. Discussing medication options and behavioral interventions. What characteristics define this diagnosis?