“The science tells us that yes, a person who is still recovering from a concussion is at an elevated risk for sustaining another concussion ... This, I think, was avoidable.'
Many observers suspect that the first hit — given Tagovailoa’s subsequent headshaking and wobbliness — left the athlete with a concussion, also called a mild traumatic brain injury. If those were indeed signs of a head injury, that first hit may have lined him up for an even worse brain injury just days later.
After a hit to the head, when the soft brain hits the unyielding skull, the injury kicks off a cascade of changes. Some nerve cells become overactive, inflammation sets in, and blood flow is altered. These downstream events in the brain — and how they relate to concussion symptoms — can happen over hours and days, and are not easy to quickly measure, Dams-O’Connor says.
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