There's a lot of guesswork when it comes to diagnosing a concussion.
But now research shows the secret may be in the ear.
Researchers at Northwestern University say the key is how the brain processes sound. U
sing electrode sensors, they monitored a group of children as they listened to different sounds.
Kids with concussions had a 35-percent smaller brain response to pitch than those who did not have concussions.
This test correctly identified 90-percent of children with a concussion.
