I'm sorry thats a crock-my son was diagnosed with ADHD at age 3 and I have researched for years. The frontal lobe section of the brain is affected in ADHD-actually the same section as those with Tourettes. Decreased activity in this area can be charted with medical tests. Hence some of the symptoms of ADHD such as blurting out whatever they are thinking, impusivities,activities like "air drumming" are somewhat similiar to Tourettes.