Research press release


Nature Neuroscience

Fair play


Ming Hsuたちは、背外側前頭前野または眼窩前頭野(前頭部背後にある脳領域)に持続して脳障害を持つ患者、ならびに脳に障害のない対照者を観察した。被験者にエコノミックゲームをやってもらい、お金を協働的に分配する方法を決める際に、私利に走るか公正を重んじるかを調べた。


Patients with damage to a brain region called the dorsolateral prefrontal cortex are more likely to favor selfish decisions over fairer ones, reports a study published this week in Nature Neuroscience.

Ming Hsu and colleagues looked at patients who had sustained brain damage to either their dorsolateral prefrontal cortex or their orbitofrontal cortex (different areas of the brain region behind the forehead), as well as people without brain damage. The participants were asked to play economic games that pitted self-interest against fair play when deciding how to cooperatively split money.

The authors found that compared to the other two groups, the patients with damage to their dorsolateral prefrontal cortex were more likely to lie to their partner to prevent them from having better financial gain compared to themselves. By modeling these results, Hsu and colleagues also concluded that the dorsolateral prefrontal cortex normally helps to promote honesty over self-interest, and damage to this region impairs this ability.

doi: 10.1038/nn.3798

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