SCIENCE / AFP : Brain Structure Differs in Liberals, Conservatives

Illustration by Yakobchuk Vasyl / The Independent.

It’s all in your head!

New study shows liberals have more gray matter in a part of the brain related to understanding complexity, while the conservative brain is bigger in the section linked to fear.

By AFP / AlterNet / April 11, 2011

Everyone knows that liberals and conservatives butt heads when it comes to world views, but scientists have now shown that their brains are actually built differently.

Liberals have more gray matter in a part of the brain associated with understanding complexity, while the conservative brain is bigger in the section related to processing fear, said the study on Thursday in Current Biology.

“We found that greater liberalism was associated with increased gray matter volume in the anterior cingulate cortex, whereas greater conservatism was associated with increased volume of the right amygdala,” the study said.

Other research has shown greater brain activity in those areas, according to which political views a person holds, but this is the first study to show a physical difference in size in the same regions.

“Previously, some psychological traits were known to be predictive of an individual’s political orientation,” said Ryota Kanai of the University College London, where the research took place.

“Our study now links such personality traits with specific brain structure.”

The study was based on 90 “healthy young adults” who reported their political views on a scale of one to five from very liberal to very conservative, then agreed to have their brains scanned.

People with a large amygdala are “more sensitive to disgust” and tend to “respond to threatening situations with more aggression than do liberals and are more sensitive to threatening facial expressions,” the study said.

Liberals are linked to larger anterior cingulate cortexes, a region that “monitor(s) uncertainty and conflicts,” it said.

“Thus, it is conceivable that individuals with a larger ACC have a higher capacity to tolerate uncertainty and conflicts, allowing them to accept more liberal views.”

It remains unclear whether the structural differences cause the divergence in political views, or are the effect of them.

But the central issue in determining political views appears to revolve around fear and how it affects a person.

“Our findings are consistent with the proposal that political orientation is associated with psychological processes for managing fear and uncertainty,” the study said.

[This article was published by AFP news agency (Agence France-Presse) and was distributed by AlterNet.]

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5 Responses to SCIENCE / AFP : Brain Structure Differs in Liberals, Conservatives

  1. Pollyanna says:

    Be afraid! Be very afraid!

    Hey, this is great news, suggesting that eventually brain surgeons may be able to cure neofascism!

  2. JoJo says:

    this has all the earmarks of a hoax.

  3. Anonymous says:

    Interesting but, at least as reported, has more than a whiff of interpretive bias. Correlation does not signify causation and the cohort was hardly representative of the population at large. Fun reading but the cost of that many MRI’s could probably support an elementary school for an entire semester.

  4. Yeah, and cutting out the "conservative" who conserve Nothing Wars of Conquest would fund the entire Public Education system for several years, and a great deal longer as the savings from non-aggression pile up.

    The "conservatives" wouldn't care much about public education, though, it's like Iscariot chiding the woman who washed Christ's feet with

  5. Brother Jonah says:

    An MRI costs roughly a hundred bux to administer, probably a lot less at a not-for-profit research facility.

    Same with EEGs, the cost you'd see on your hospital bill is inflated for profit.
    Like getting charged $10 for an aspirin.

    Just, you know, sayin' is all. The data processing is probably a lot more expensive than the gathering of raw data.

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