sportandsociety.com

From Sam Kean in 3 quarks daily:

Head injuries have dogged the National Football League since its very early days, since even before facemasks. But, donning the proud mantle of tobacco scientists everywhere, the NFL’s experts refused to admit until just a few months ago that it wasn’t a coincidence so many former players ended up with neurological damage by the time they turned fifty. The word going around is that a few skeptical medical men in charge of the NFL’s official investigation into the matter, a team led by one Dr. Ira Casson, had been dismissing the link between concussions and cognitive difficulties. Casson seemed obviously full of crap, and after Congress hog-piled onto the issue to scold the league, the NFL finally dismissed Casson and reevaluated the evidence. It was damning. In one study, coroners discovered that twelve of thirteen former NFL players had a buildup of a plaque in their brains—a plaque—called tau, a snarl of protein that disrupts neuronal function and that has been linked to neurodegenerative diseases like Alzheimer’s. Many of the NFL players died in their forties; another autopsy revealed the beginning of tau tangles in an 18-year-old.

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