
In 1885, Georges Gilles de la Tourette, M.D., described in the Achives of Neurology a neuropsychiatric disorder characterized by chronic motor and vocal tics that begin in childhood. During the next century, researchers demonstrated that the disorder, which came to be called Tourette's syndrome (TS), is probably inherited as a dominant gene that expresses with widely varying symptoms, even within monozygotic twin pairs.
