Concussion / Mild Traumatic Brain Injury

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• Ch: transient alteration of consciousness from head trauma without significant parenchymal disruption or abnormalities
• LOC: <10% of sports-related concussions
• SIS: secondary impact syndrome
  Epi: >children
  Ch: while recovering from 1st concussion, cortex more suseptible to trauma --> cerebral edema w/ permanent neuro deficit

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References: 
Halstead ME Walter KD and the Council on Sports Medicine and Fitness Clinical Report. Sports-related concussion in children and adolescents. Pediatrics 126:597-615 (2010).