Causes of Tourette's syndrome

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The underlying cause of TS is not fully understood. It is accepted that TS runs in families, but exactly how it is inherited and which genes are involved are not yet known.

TS is known to stem from the development of the brain and spinal chord (the central nervous system) and to involve neurotransmitters (chemicals that carry signals within the brain). It is possible that some parts of the central nervous system develop unevenly, and that this causes the symptoms of TS.