When It Comes To Risk, Grey Matter Matters

The volume of grey matter could be used as a biomarker for financial risk attitudes, researchers say.

AsianScientist (Sep. 18, 2014) – There is a link between our brain structure and our tolerance of risk, new research published in the Journal of Neuroscience suggests.

Dr. Agnieszka Tymula, an economist at the University of Sydney, is one of the lead authors of a new study that identifies what might be considered the first stable ‘biomarker’ for financial risk-attitudes.

Using a whole-brain analysis, Dr. Tymula and international collaborators found that the grey matter volume of a region in the right posterior parietal cortex was significantly predictive of individual risk attitudes. Men and women with higher grey matter volume in this region exhibited less risk aversion.

“Individual risk attitudes are correlated with the grey matter volume in the posterior parietal cortex suggesting existence of an anatomical biomarker for financial risk-attitude,” said Dr. Tymula. This means tolerance of risk “could potentially be measured in billions of existing medical brain scans,” she said.

But she has cautioned against making a causal link between brain structure and behaviour. More research will be needed to establish whether structural changes in the brain lead to changes in risk attitude or whether that individual’s risky choices alter his or her brain structure or both.

“The findings fit nicely with our previous findings on risk attitude and ageing. In our Proceedings of the National Academy of Sciences 2013 paper we found that as people age they become more risk averse,” she said.

“From other work we know that cortex thins substantially as we age. It is possible that changes in risk attitude over lifespan are caused by thinning of the cortex.”

The article can be found at: Gilaie-Dotan et al. (2014) Neuroanatomy Predicts Individual Risk Attitudes.


Source: University of Sydney; Photo: deradrian/Flickr/CC.
Disclaimer: This article does not necessarily reflect the views of AsianScientist or its staff.

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