A remarkable recent experiment allowed scientists to see inside the skull and brain of animals that had just experienced a concussion, providing sobering new evidence of how damaging even minor brain impacts can be. While the results, which were published in Nature, are worrisome, they also hint at the possibility of treating concussions and lessening their harm. Concussions occur when the brain bounces against the skull after someone’s head is bumped or jolted. Such injuries are fairly common in contact sports, like football and hockey, and there is growing concern that repeated concussions might contribute to lingering problems with thinking or memory. This concern was heightened this week by reports that the brain of the late major league baseball player Ryan Freel showed symptoms of chronic traumatic encephalopathy, a degenerative condition. He reportedly had been hit in the head multiple times during his career. But scientists did not know exactly what happens at a molecular level inside the brain during and after a concussion. The living brain is notoriously difficult to study, since it shelters behind the thick, bony skull and other protective barriers. In some earlier studies, scientists had removed portions of lab animals’ skulls to view what happened to their brains during subsequent impacts. But removing part of the skull causes its own tissue damage and physiological response, muddying any findings about how the brain is... |
The companies that make helmets and mouth guards often claim that their own products can reduce players’ risk of a sports-related concussion or lessen the impact of a concussion that does occur. These manufacturers cite “laboratory research” that purports to show one brand is safer than others, and a group of researchers wanted to see if they could verify such claims, according to a summary of a presentation they made Monday at a national meeting of the American Academy of Pediatrics.
The research team, from the University of Wisconsin-Madison and the Medical College of Wisconsin, tracked 1,332 high school football players from 36 schools during the 2012 season. Participating players completed a preseason questionnaire about their injury history and demographic information. Then, as the season progressed, athletic trainers from the schools kept tabs on the incidence and severity of any concussions that occurred.
At the start of the study, 171 of the players — or 13% — told the researchers that they had experienced a sports-related concussion in the previous 12 months. During the 2012 football season, an additional 116 concussions were sustained by 115 players — 8.6% of the student athletes in the study.
When the researchers compared...
The research team, from the University of Wisconsin-Madison and the Medical College of Wisconsin, tracked 1,332 high school football players from 36 schools during the 2012 season. Participating players completed a preseason questionnaire about their injury history and demographic information. Then, as the season progressed, athletic trainers from the schools kept tabs on the incidence and severity of any concussions that occurred.
At the start of the study, 171 of the players — or 13% — told the researchers that they had experienced a sports-related concussion in the previous 12 months. During the 2012 football season, an additional 116 concussions were sustained by 115 players — 8.6% of the student athletes in the study.
When the researchers compared...