How Do Doctors Define Concussion?

(Inside Science) -- What is a concussion? The precise definition still eludes us in many ways. A concussion is a type of traumatic brain injury, and a good clinical definition of a concussion is a trauma-induced alteration in the level of neurologic functioning. But what does that mean exactly?

"In simple terms, a concussion is when a blow is sustained to the head that manifests itself in some form of consequence, whether that is a symptom that is precipitated, or whether it's an actual neurologic deficit that arises from that blow to the head," said David Okonkwo, clinical director at the UPMC Brain Trauma Research Center.

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