This disorder is an inherited, neurobiological disorder, characterized by repeated and involuntary movements (tics) and uncontrollable vocal sounds. In a minority of cases, the vocalization can include socially inappropriate words and phrases (coprolalia).
These outbursts are un-intentional or on purpose.
Involuntary symptoms can include the following:
> Eye blinking.
> Repeated throat clearing or sniffing.
> Arm thrusts.
> Kicking movements.
> Shoulder shrugging or jumping.
These and other symptoms typically appear before age eighteen, and the condition occurs in all ethnic groups, with males affected 3-4 times more often than females. Although symptoms vary from person to person, and range from mild to severe, the majority of cases fall into the mild category.
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