This was an interesting article by Nigel Barber Ph.D.
Peering inside the brain with MRI scans, researchers at University College London found that self-described conservative students had a larger amygdala than liberals. The amygdala is an almond-shaped structure deep in the brain that is active during states of fear and anxiety. Liberals had more gray matter at least in the anterior cingulate cortex, a region of the brain that helps people cope with complexity.
https://www.psychologytoday.com/blog...in-study-finds