Even a pretty small knock to a child's head can lead to problems for months afterward, a new study finds.
Researchers charted the progress of more than 250 kids admitted to two hospitals for either mild traumatic brain injuries or broken bones in an arm or leg.
The kids who had brain injuries — especially ones that led to unconsciousness or visible changes on MRI scans — were more likely than the others to have headaches, tiredness and trouble thinking a year after being seen at the hospitals.
Concussions affect the thinking of teenagers more than they do that of adults or children, according to a new study. But all three age groups show lasting problems with working memory after sports concussions.