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Tourette syndrome (TS) is a common genetic neurological disorder characterized by chronic motor and vocal tics beginning before adulthood. Affected individuals typically have repetitive, stereotyped movements or vocalizations, such as blinking, sniffing, facial movements, or tensing of the abdominal musculature.
In approximately 10% of the cases there is a family history of the disorder. Tourette syndrome appears to represent a communication problem within the brain, primarily involving the brain chemicals serotonin and dopamine. The exact genetic cause of Tourette syndrome is unknown.n approximately 10% of the cases there is a family history of the disorder. Tourette syndrome appears to represent a communication problem within the brain, primarily involving the brain chemicals serotonin and dopamine. The exact genetic cause of Tourette syndrome is unknown.