Brain structure differs in liberals, conservatives: study
Sunday 10 April 2011
Everyone knows that liberals and conservatives butt heads when it comes to world views, but scientists have now shown that their brains are actually built differently.
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.
Other research has shown greater brain activity in those areas, according to which political views a person holds, but this is the first study to show a physical difference in size in the same regions.
"Previously, some psychological traits were known to be predictive of an individual's political orientation," said Ryota Kanai of the University College London, where the research took place.
"Our study now links such personality traits with specific brain structure."
The study was based on 90 "healthy young adults" who reported their political views on a scale of one to five from very liberal to very conservative, then agreed to have their brains scanned.
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."
It remains unclear whether the structural differences cause the divergence in political views, or are the effect of them.
But the central issue in determining political views appears to revolve around fear and how it affects a person.
"Our findings are consistent with the proposal that political orientation is associated with psychological processes for managing fear and uncertainty," the study said.
Apple has been hit by complaints about the 1.1GB download
Much-loved cartoon character returns - without Sir David Jason
Liam Neeson's Downton dreams
Matt Smith is set to join cast of the Jane Austen classic - with a twist
Actress to appear in second series of the hugely popular crime drama
Life & Style blogs
Ebola outbreak: Survivor William Pooley is flown to US to give doctor with virus emergency blood transfusion
Jennifer Lawrence nude pictures leaked: Reddit removes 'The Fappening' board dedicated to sharing naked pictures of celebrities
Tezenis removes 'crime scene' pants from Oxford Street store after backlash over 'rape' connotations
iOS 8: 6 reasons you might want to hold off updating
Olympic diver Tom Daley makes his modelling debut for Adidas
- 1 Thailand beach murders: Thai PM suggests 'attractive' female tourists cannot expect to be safe wearing bikinis
- 2 Scottish independence: Five reasons Salmond is secretly hoping for a 'No' vote
- 3 Isis plan to 'behead random member of the public' in Sydney thwarted by Australian police
- 4 Scottish independence: Andy Murray backs Yes campaign in eleventh hour decision
- 5 Have you heard about the film Singapore has banned its people from watching? Well, you have now
£45000 - £55000 Per Annum 31 days holiday, pension, healthcare, annual bonus: ...
£110 - £120 per day: Randstad Education Preston: We are looking for an experie...
£100 - £222 per day: Randstad Education Bristol: We are currently recruiting f...
Negotiable: Randstad Education Birmingham: SEN TA's apply now! West Midlands