Amnesia

"Sports Activity After a Concussion Slows Recovery - NYTimes.com." Health and Wellness - Well Blog - NYTimes.com. Web. 30 Sept. 2010. <http://well.blogs.nytimes.com/2008/05/16/sports-activity-after-a-concussion-slows-recovery/>.

•  concussed athletes showed noticeably less activity in portions of the brain associated with attention
• ‘They had suppressed attentional resources,’’ said Steven Broglio
•  ‘‘There’s strong evidence that children recover better’’ than adults from certain catastrophic brain injuries like strokes, as well from brain surgery, Dr. Giza said. ‘‘But concussions may be different,’’ he continued. 
• Student athletes who return to sports quickly after a concussion appear to have a slower brain recovery than teens who stay off the field longer, a new study shows.
• Every year there are more than 300,000 sports-related concussions in the United States, and more than 60,000 cases occur among high school students.
• More than 750,000 Americans each year report injuries received during recreational sports, with 82,000 involving brain injuries.
• Brain injuries cause more deaths than any other sports injury. Studies show that Emergency Room visits, for kids between the ages of 14 and 19 more than tripled.