Gilles de la Tourette syndrome: a neuropsychiatric disorder.

Gilles de la Tourette Syndrome is a neuropsychiatric disorder which manifests with neurological psychological and psychiatric symptoms. Understanding of this complex disorder has grown rapidly in the past 25 years. This paper reviews the current knowledge of biological and psychological factors which interact to produce a variable yet clearly recognisable syndrome. New directions for research are explored. Current literature suggests that despite many gains, much remains to be learned about this disorder.