Youth Sport Injuries May Lead to Adult Brain Disease

The degenerative brain disease being blamed for suicides and mental illness in pro athletes may have started when they were young athletic children and absorbing knocks in grade school and high school, experts say.

The theory also suggests that many people who are not elite athletes playing contact sports, but did play sports as children, may be at risk for developing chronic traumatic encephalopathy, or CTE.

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"We don't know what the age of onset is with any of these cases," said Chris Nowinski, the co-director of the Boston University Center for the Study of Traumatic Encephalopathy. "There is reason to believe it can begin when a child is very young."

The latest discussion of CTE arose after former Major League Baseball player Ryan Freel, who committed suicide at the age of 36, was diagnosed to have had the disease. CTE had not been associated with baseball players. Instead it is linked to the public's perception of more violent sports like football, ice hockey and boxing.

Nowinski's colleague, Dr. Ann McKee, has dissected and studied more than 180 brains of athletes. Over 100 have been found to have CTE pathology.

Nowinski noted that Freel had a well documented history of blows to the head and concussions starting in childhood when he played youth football.

Rough hits, hard knocks and head butts begin early on in any athletic career when kids join sports teams and youth leagues. A recent report from the Institute of Medicine and National Research Council found more than 250,000 athletes under the age of 19 were treated in U.S. emergency departments for concussions and other brain injuries in 2009. College athletes have twice the risk of concussion compared to high school athletes.

Nowinski said getting beaned on the head with a baseball or a falling off a balance beam might be just as dangerous in contracting CTE as helmet to helmet contact in a football game.

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Youth Sport Injuries May Lead to Adult Brain Disease