[quote]IQ measures the analytical part of the brain[/quote]

They actually don't measure any part of your brain. The absolute best that IQ tests can do is measure a specific set of skills in a very narrow range of testable categories, which is why they aren't a full measure of intelligence. They tend to focus on mathematical ability, because they came about right after Sputnick launched and the United states was investing enormous sums of money into the sciences. The US government wanted to find out what soldiers would be good at performing tasks that would help them win the space race (ie, math and science) and so they catered the exams to do just that. They are good predictors at this very narrow range of intelligence, but actually neglect most of what the human mind is capable of. Of Gardner's multiple intelligences, IQ tests can measure two: Verbal and Mathematic. They cannot measure Visual, Musical, Kinesthetic, interpersonal, intrapersonal, Naturalistic, or Existential intelligences, all of which it is possible to exhibit various levels of analytic ability in.