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Full coverage: Concussions

NFL players' brains at work show early signs of concussions' toll

After many blows to the head, the brain must work harder to keep up

Head injuries in one football season cause measurable brain damage

Even when they didn't have concussions, athletes who suffered blows to the head still had measurable brain injuries.

NFL concussion rates are lower at higher altitudes, study finds

Playing football at higher altitudes was correlated with reduced risk of concussion among NFL players, a study finds.

Concussions linked to Alzheimer's disease?

A Mayo Clinic study finds a link between head injury and brain plaques related to Alzheimer's disease.

Post-concussion return to learning also a tough decision

Post-concussion return to learning also a tough decision

Could a blood test detect concussion with lasting disability?

Could a blood test detect concussion with lasting disability?

Report on sports concussions in kids calls for more study

Research to prevent and better treat brain injury is incomplete, the Institute of Medicine says.

Are multiple concussions driving suicides in the military?

A new study shows that military personnel who suffer multiple concussions are at far greater risk of suicide than those who have never sustained a traumatic brain injury.

Hockey still plagued by concussions, despite rule changes

A new study of NHL hockey games over 3 seasons shows that a new rule banning hits to the head did not lead to a reduction in the number of concussions.

Study: No helmet brand can save football players from concussion risk

No particular brand or type of football helmet can protect high school players from risk of concussion, study finds.

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