From Terri Mauro,
Your Guide to Parenting Special Needs.
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Definition:

Tourette Syndrome (TS) is a neurological disorder which involves involuntary movements and utterances, called tics. Tics can be simple, like eye blinking or throat clearing; or complex, like jumping or repeating phrases. Some tics may be offensive, described as copropraxia (obscene gestures) and coprolalia (obscene words). While it may be possible for persons with TS to control the tics for a short time, this often leads to a bigger outburst later.

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Also Known As: Tourette's Syndrome, Tourette's, Tourette's Disorder, Gilles de la Tourette Syndrome, tic disorder