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Excessive Prenatal Exposure to Testosterone Key to High IQ

by Sheela Philomena on March 14, 2011 at 3:33 PM
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 Excessive Prenatal Exposure to Testosterone Key to High IQ

In a study conducted by University of Alberta it was found that being bright and brilliant is associated to prenatal exposure of higher levels of testosterone.

According to Marty Mrazik, in the same way that physical and cognitive deficiencies can be developed in uterus, so, too, could similar exposure to this naturally occurring chemical result in giftedness.

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"There seems to be some evidence that excessive prenatal exposure to testosterone facilitates increased connections in the brain, especially in the right prefrontal cortex," said Mrazik.

"That's why we see some intellectually gifted people with distinct personality characteristics that you don't see in the normal population."

Mrazik's notion came from observations made during clinical assessments of gifted individuals.
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"It gave us some interesting ideas that there could be more to this notion of genius being predetermined from a biological perspective than maybe people gave it credit for," said Mrazik.

"It seemed that the bulk of evidence from new technologies (such as Functional MRI scans) tell us that there's a little bit more going on than a genetic versus environmental interaction."

Based on their observations, the researchers made the hypothesis that this hormonal "glitch" in the in-utero neurobiological development means that gifted children are born with an affinity for certain areas such as the arts, math or science.

Mrazik hopes that devices such as the Functional MRI scanner will give them a deeper understanding of the role of neurobiology in the development of the gifted brain.

"It's really hard to say what does put the brain in a pathway where it's going to be much more precocious. The next steps in this research lay in finding out what exact stimuli causes this atypical brain development," he said.

Mrazik cautions that more research is needed to determine what exact processes may cause the development of the gifted brain.

The study appears in Roeper Review.

Source: ANI
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