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Tic disorders

People with tic disorders make sounds or display non-purposeful body movements repetitively, quickly, suddenly, or uncontrollably.   A tic is a sudden, brief, repetitive movement such as eye blinking or eye movement, facial grimacing, shoulder shrugging, or head/shoulder jerking. Vocal tics are sounds made involuntarily and include repetitive throat-clearing, sniffing, or grunting. Tourette’s syndrome is an example of a tic disorder.