Getting hit on the head is an unpleasant event and most people will bump their heads at a minimum once a month, maybe even once a week. That level of impact won’t do much damage, aside from maybe a bruise and lump that’s tender to the touch. More severe knocks on the head, or neck, will likely land you with a concussion; the worst and most aggressive hits will give you what is called a traumatic brain injury and/or catastrophic injury. Traumatic brain injuries are the result of extreme force...

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