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A car accident, a rough tackle, an unexpected tumble. The number of ways to bang up the brain are almost as numerous as the people who sustain these injuries. And only recently has it become clear just how damaging a seemingly minor knock can be.

In studies that observe the brain in action, the right hemisphere seems to be the sexy hemisphere. It lights up during orgasm--so much so that, in one study , much of the cortex went dark, leaving the right prefrontal cortex as a bright island

CT scans may put kids at risk for cancer down the road, but study says watching kids for signs of brain injury can help