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Personality Traits Are Linked To Differences In Brain Structure, Says Researchers (neurosciencenews.com)
New submitter baalcat quotes a report from Neuroscience News: Our personality may be shaped by how our brain works, but in fact the shape of our brain can itself provide surprising clues about how we behave -- and our risk of developing mental health disorders -- suggests a study published today. According to psychologists, the extraordinary variety of human personality can be broken down into the so-called 'Big Five' personality traits, namely neuroticism (how moody a person is), extraversion (how enthusiastic a person is), openness (how open-minded a person is), agreeableness (a measure of altruism), and conscientiousness (a measure of self-control). In a study published today in the journal Social Cognitive and Affective Neuroscience, an international team of researchers from the UK, US, and Italy have analyzed a brain imaging dataset from over 500 individuals that has been made publicly available by the Human Connectome Project, a major US initiative funded by the National Institutes of Health. In particular, the researchers looked at differences in the brain cortical anatomy (the structure of the outer layer of the brain) as indexed by three measures -- the thickness, area, and amount of folding in the cortex -- and how these measures related to the Big Five personality traits. The study has been published in the journal Social Cognitive and Affective Neuroscience.
So it would be nice if the summary linked to the actual study instead of the splash page for the journal. Some of the results wouldn't hurt either.
Neuroticism was associated with thicker cortex and smaller area and folding in prefrontal–temporal regions. Extraversion was linked to thicker pre-cuneus and smaller superior temporal cortex area. Openness was linked to thinner cortex and greater area and folding in prefrontal–parietal regions. Agreeableness was correlated to thinner prefrontal cortex and smaller fusiform gyrus area. Conscientiousness was associated with thicker cortex and smaller area and folding in prefrontal regions. ... Cortical thickness and surface area/folding were inversely related each others as a function of different FFM traits (neuroticism, extraversion and consciousness vs openness), which may reflect brain maturational effects that predispose or protect against psychiatric disorders.