So display signor symptoms up a concussion an airport from me so first the definition the first one is basically we're talking about a dramatically induced transient disturbance a brain function now this a that keys to this one is that it’s generally self-limited and it's less yes severe on the end of the on the less severe and above vitalita derma the brain injury spectrum so you have your severe traumatic brain injury car accident different things like that compared to the left severe ones mild traumatic brain injuries that term was commonly used interchangeably with concussions now it's recommended that it’s not meaning concussion is more sport induced .
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