Left wing or right wing? It's written in the brain

First, the 'discovery' of The Liberal Gene (see preceding post), and now a study suggesting correlation between the thickness of 2 brain structures and political persuasions. (The thickness of brain structures could be genetic too)
The correlation associates thicker amygdala (emotion center) with propensity to right wing politics and a thickened anterior cingulate cortex (decicion making) with liberal or left wing politics.

People with liberal views tended to have increased grey matter in the anterior cingulated cortex, a region of the brain linked to decision-making, in particular when conflicting information is being presented. Previous research showed that electrical potentials recorded from this region during a task that involves responding to conflicting information were bigger in people who were more liberal or left wing than people who were more conservative.

Conservatives, meanwhile, found increased grey matter in the amygdala, an area of the brain associated with processing emotion. This difference is consistent with studies which show that people who consider themselves to be conservative respond to threatening situations with more aggression than do liberals and are more sensitive to threatening facial expressions.

Taken together, the findings suggest that, at least to some extent, political persuasions are encoded in the structure of the brain. However, given that the structure of even the adult brain can be altered with training, it is not clear whether these differences would affect a person's political choice or vice versa.

Source: Left wing or right wing? It's written in the brain

Ref: The Anterior Cingulate Cortex - function and structure explained