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Tourette Syndrome
Tourette's is thought to involve faulty regulation the brain circuits between the frontal cortex and the basal ganglia. Studies have established with little doubt that Tourette's syndrome is genetic, but the exact type of inheritance is debatable. Tourette's syndrome was thought to be transmitted by means of an autosomal dominant gene. Recent studies suggest that the method of transmission may be more complex then thought. More than one gene may be involved, and it' is possible that different genetic effects are involved in different families. Another aspect is that you don't "inherit" Tourette's syndrome. You inherit a genetic predisposition or vulnerability to the condition. It is a condition of variable penetrance, which means that not everyone who inherits the gene will express severe symptoms.
Accurate figures are hard to come by because good broad-based population studies have not been done. Since tics tend to subside as children mature, fewer......

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Approximate Pages: 3 (250 words per double-spaced page)

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