Mild Traumatic Brain Injury Registry

Inclusion Criteria: * Must have defined history of CHI (closed head injury) which produced an altered state of consciousness or mood * Must be awake and alert (Glasgow Coma Scale 13-15) * Must be enrolled within 72 hours of injury * Must have CT or MRI neuroimaging performed Exclusion Criteria: * Diabetes Mellitus with severe complications * Intoxication at time of enrollment * Major psychiatric disorder that is poorly controlled * Prior stroke * History of Social Security defined "disability * Uncontrolled Seizure Disorder * Incarceration or arrest * Concurrent Injury requiring hospitalization * Use of anticoagulant drugs * Any condition the investigator deems as inappropriate for patient enrollment * Personality disorder * Heart, liver or kidney failure defined using common clinical practice guidelines * Baseline cognitive impairment * Homelessness * TBI associated with interpersonal violence * Pregnancy * Long bone fracture requiring surgical stabilization