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Message: [QUOTE="boog204, post: 2073674, member: 880"] Let me help, Chief... I've bolded some parts that you may want to read. [I]Second impact syndrome occurs when an[B] athlete returns to sport too early after suffering from an initial concussion. The athlete does not need to receive a strong second blow to the head to set the effects in motion.[/B] The athlete may receive only a minor blow to the head or a hit to the chest or back that snaps the head enough to have the brain rebound inside the skull. Because the brain is more vulnerable and susceptible to injury after an initial brain injury, [B]it only takes a minimal force to cause irreversible damage.[/B] The brain’s ability to self-regulate the amount of blood volume to the brain is damaged resulting in increased cerebral blood volume which can result in brainstem herniation and death. [B]The pressure to the brain increases rapidly causing brain death in as little as three to five minutes. Because brain death is so rapid, second impact syndrome has a high fatality rate in young athletes. [/B](sportsmd.com)[/I] [B][I][/I][/B] [I][B]...even the mildest [URL='https://en.wikipedia.org/wiki/Concussion#Grades']grade of concussion[/URL] can lead to SIS[/B]. (Clinics in Sports Medicine via Wikipedia)[/I] [/QUOTE]