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When it comes to concussions, proper diagnosis can make the difference between a full recovery and permanent disability, and in some instances, even death. Just as dangerous is "second impact syndrome" where a second brain injury that occurs while a patient is recovering from the first can prove fatal. To help you determine whether it’s likely a patient has suffered a concussion, the American Academy of Neurology Education & Research Foundation in St. Paul, MN, has come up with an easy reference guide.
Immediate signs of concussion (seen within seconds or minutes)
Later signs of concussion (If the following symptoms appear hours, days, or even weeks later, consult a neurologist)