Multiple concussions can disrupt brain connectivity: study

Study in young people suggests concussion may be a two-tier disease, researchers say

Teens and young adults who have symptoms of post-concussion syndrome after multiple concussions may have disrupted connectivity in the brain's default-mode network, a study shows.

Young man scoring a try in rugby

The findings suggest there may be a number of concussions beyond which it is unsafe to continue playing contact sport, the researchers say.

The US study, presented at the Radiological Society of North America annual meeting, examined 142 young people with concussion (67 female, mean age 18) with a history of

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