(WTNH) – A new CDC study is shedding light on concussions among children under the age of 17. The study found that among reported cases, 7 percent of children have suffered a concussion or head injury.

As parents or grandparents, how can you tell if a bump to the head is something more serious?

Dr. Michael Marchetti, sports medicine specialist with the Hartford HealthCare Medical Group in Cheshire discusses this topic.

Watch the video above for the full interview.