You must be registered to comment and vote on comments.
According to studies at Purdue University, up to 50% of football players experience no symptoms of head injury, but show significant declines in cognitive testing after practices or games. Add to this that there is as yet no true understanding of the cellular or biochemical processes that lead to brain injury; or what triggers irreversible injury instead of transient, reversible trauma. The more research that appears asks more questions and, so far, fewer answers.
Your comment is being reviewed for inclusion on the site.
Comments will be reviewed before being published.
425 Portland Av. S.
Minneapolis, MN 55488
© 2014 StarTribune. All rights reserved.
StarTribune.com is powered by Limelight Networks