Study: Liberal brains bigger in areas dealing with complexity, conservative brains bigger in area of fear

Want to know what’s driving the budget debate?

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.

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.”

And you’d think a fear-based brain would be less evolutionarily advanced, since when we lived like animals fear probably would be the most important life-preserving mechanism. Not so helpful in modern society.


Follow me on Twitter: @aravosis | @americablog | @americabloggay | Facebook | Instagram | Google+ | LinkedIn. John Aravosis is the Executive Editor of AMERICAblog, which he founded in 2004. He has a joint law degree (JD) and masters in Foreign Service from Georgetown; and has worked in the US Senate, World Bank, Children's Defense Fund, the United Nations Development Programme, and as a stringer for the Economist. He is a frequent TV pundit, having appeared on the O'Reilly Factor, Hardball, World News Tonight, Nightline, AM Joy & Reliable Sources, among others. John lives in New York City, and is the cofounder of TimeToResign.com. Bio, .

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