Tourette’s Disorder, commonly known as Tourette's Syndrome, is a “tic” disorder involving involuntary responses and affecting one in 2000 people. A tic is an involuntary vocalization or movement. It comes on suddenly and is recurrent and non-rhythmic (i.e., unlike hiccups). The rapid and stereotyped movements and vocalizations are both present in Tourette’s but are not necessarily concurrent. This disorder has its onset at an early age, before the individual is 18 years old.