Tourette Syndrome

**Semantic type:** Mental or Behavioral Dysfunction

**Definition:** A neurologic disorder caused by defective metabolism of the neurotransmitters in the brain. It is characterized by repeated involuntary movements (motor tics) and uncontrollable vocal sounds (vocal tics). The symptoms are usually manifested before the age of eighteen.

**Synonyms:** - Gilles de la Tourette syndrome - Tourette's Syndrome - Tourette's Syndrome