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A new study links good nutrition with good cognitive performance, presenting exciting new evidence that cognitive decline could be slowed in old age by simply altering one's diet. By looking at biomarkers in the blood of the study's 104 participants, researchers sought an objective measure of health before beginning cognitive tests. "People who had higher levels of B family vitamins, as well as vitamins C, D, and E had higher scores on cognitive tests than people with lower levels," reported researchers.

The researchers liken the favored networks to a country club setting, in which people with a great number of social connections bond with other connection-rich socialites. In the brain, the socialites (the hubs with the most connections, shown in red in the image) included the regions that aggregate and process many kinds of information—the superior frontal and superior parietal cortex, for example, as well as the subcortical hippocampus, putamen and thalamus.