No surprises here but it's a recent confirmation of what most expected, I think.

Brain structure differs in liberals, conservatives: study
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....


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.
  • Anterior cingulate cortex
  • Right amygdala
    Additional studies have shown a link between the amygdala and schizophrenia, noting that the right amygdala is significantly larger than the left in schizophrenic patients.