10 years ago
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Scans show retired American football players have brain deficits
Scientists have found profound abnormalities in scans of brain activity in a group of retired American football players, adding to evidence indicating that repeated blows to the head
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http://www.reuters.com
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The fact that repeated blows to the head leave one permanently mentally impaired has been common knowledge for over fifty years. Boxers had been known to suffer even long before that. It ain't new(s).