A concussion is classified as a mild traumatic brain injury.

“what we mean by concussion and we in the clinical world we use M traumatic brain injury kind of synonymously with concussion uh it it's it basically is is a tearing of axons it's the bra the brain cells have these long fibers that communicate with each other and they're called axons and when the brain violently moves forward and backwards if you're in a car accident and you have your seat Bel on and you suddenly hit you go from 50 to zero your head violently goes forward and violently goes backwards and that angular Force actually tears and stretches axons in the brain”