Tourette syndrome (TS) is a problem of the nervous system that was first described by the French neurologist, Gilles de la Tourette, more than 125 years ago.
The major symptom is tics. Tics are sudden, brief, involuntary or semi-voluntary movements (motor tics) or sounds (vocal tics).
To make a diagnosis of TS, a person must have many motor tics and at least one vocal tic, almost every day for more than a year.
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