People who suffer concussion when they are young can suffer mental and physical problems from the knock even up to 30 years later, researchers have discovered.
They tested the health of 40 former athletes, and found that 19 who had suffered concussion in their youth showed subtle health problems.
They displayed poorer memories, had delayed responses, and were unable to complete hand control tests as quickly.
The researchers stressed that the affects were not major, and none of those who had suffered concussion showed any signs of serious mental deterioration, such as Alzheimer's.
(Source: Brain, January 28, 2009).