Brain Responds More to Close Friends, Imaging Study Shows (Study 2010; in ScienceDaily)

“People’s brains are more responsive to friends than to strangers, even if the stranger has more in common, according to a study in the Oct. 13 issue of The Journal of Neuroscience. Researchers examined a brain region known to be involved in processing social information, and the results suggest that social alliances outweigh shared interests. […]

“In all experiments, closeness but not similarity appeared to drive responses in medial prefrontal regions and associated regions throughout the brain,” Krienen said. “The results suggest social closeness is more important than shared beliefs when evaluating others.””

Fenna M. Krienen, Pei-Chi Tu, and Randy L. Buckner. Clan Mentality: Evidence That the Medial Prefrontal Cortex Responds to Close Others. Journal of Neuroscience, 2010; 30: 13906-13915 DOI: 10.1523/JNEUROSCI.2180-10.2010

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