amygdala

Interesting but not terribly useful information.

From Salon.com:

A study to be published next year at University College London suggests that conservative brains are structured differently than the brains of other people. The investigation, led by Geraint Rees, focused on 92 individuals in the U.K. — 90 students and two members of Parliament.

Specifically, the research shows that people with conservative tendencies have a larger amygdala and a smaller anterior cingulate than other people. The amygdala — typically thought of as the “primitive brain” — is responsible for reflexive impulses, like fear. The anterior cingulate is thought to be responsible for courage and optimism. This one-two punch could be responsible for many of the anecdotal claims that conservatives “think differently” from others.

Since only adults were included in the investigation, researchers were unable to determine if cerebral physiology drives politics or if political beliefs change the brain. A previous University of California study suggests the former is possible, isolating a so-called “liberal gene” — the neurotransmitter DRD4 — responsible for an increased receptiveness to novel ideas.