• Concussions may be among the most common and least understood military injuries, with the identification of so-called “mild” traumatic brain damage a major challenge to combating the problem, health experts warned lawmakers on Wednesday. But they also said the reasons for those shortfalls don’t fall solely on Defense Department and veterans researchers. Understanding and diagnosing the problem remains frustratingly elusive in the medical community, even as an ever-increasing amount of is compiled from sports injuries, workplace accidents and other non-military events.

  • While reliable tests in living patients for the neurodegenerative disease have yet to be developed, the Redskins quarterback said he would retire if he learned he had CTE.

  • Larry Johnson played his last game in 2011, and he now believes he suffers from chronic traumatic encephalopathy, the degenerative brain disorder linked to more than 100 former football players. For now, CTE can be confirmed only after death, but Johnson says his symptoms — anxiety, paranoia, the occasional self-destructive impulse — are consistent with those of past victims.

  • The 68-year-old, who has since worked as a football announcer and WWE interviewer, said he can 'feel the decline every day' as the disease slowly robs him of brain function. Alongside wife Kim he is now in the process of starting up a national support network for other sufferers and those at risk of the illness.

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