The richer and more varied a person's social network, the bigger their amygdala, a structure deep in the brain that has been linked to size and complexity of social groups in other primate species, said researchers from Massachusetts General Hospital (MGH) in the US. You can read about their study in the 26 December advance online issue of Nature Neuroscience. The amygdala comprises a pair of symmetrically placed small almond shaped structures deep within the temporal lobe...
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