Title |
The neural correlates of risk propensity in males and females using resting-state fMRI
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Published in |
Frontiers in Behavioral Neuroscience, January 2014
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DOI | 10.3389/fnbeh.2014.00002 |
Pubmed ID | |
Authors |
Yuan Zhou, Shu Li, John Dunn, Huandong Li, Wen Qin, Maohu Zhu, Li-Lin Rao, Ming Song, Chunshui Yu, Tianzi Jiang |
Abstract |
Men are more risk prone than women, but the underlying basis remains unclear. To investigate this question, we developed a trait-like measure of risk propensity which we correlated with resting-state functional connectivity to identify sex differences. Specifically, we used short- and long-range functional connectivity densities to identify associated brain regions and examined their functional connectivities in resting-state functional magnetic resonance imaging (fMRI) data collected from a large sample of healthy young volunteers. We found that men had a higher level of general risk propensity (GRP) than women. At the neural level, although they shared a common neural correlate of GRP in a network centered at the right inferior frontal gyrus, men and women differed in a network centered at the right secondary somatosensory cortex, which included the bilateral dorsal anterior/middle insular cortices and the dorsal anterior cingulate cortex. In addition, men and women differed in a local network centered at the left inferior orbitofrontal cortex. Most of the regions identified by this resting-state fMRI study have been previously implicated in risk processing when people make risky decisions. This study provides a new perspective on the brain-behavioral relationships in risky decision making and contributes to our understanding of sex differences in risk propensity. |
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