http://goo.gl/SaZ9IL
All clinical signs suggest that two head injuries close together are dangerous and can even be deadly. But the science behind what’s actually going on in the brain is still unclear – and knowing these details could help in deciding when to return athletes to play or military members to service, said lead author Zachary Weil, assistant professor of neuroscience at Ohio State.
“Lots of data show that if two head injuries occur close together, it’s not like 1 plus 1. It’s more like 1 plus 10,” Weil said. “So our goals are to understand what it is about injuries close together that makes us more vulnerable, and can we eventually use some sort of biological signal to tell when it’s safe to go back?”........
“This means that traumatic brain injury induces insulin resistance in the brain,” Weil said. “So we need to work on finding ways to acutely increase insulin sensitivity rather than increasing the actual amount of insulin in the brain.”