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A Military-Relevant Model of Closed Concussive Head Injury: Longitudinal Studies Characterizing and Validating Single and Repetitive mTBI

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Annual rept. 30 Sep 2012-29 Sep 2013

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Because of sports injuries, automobile accidents, falls, etc., and with the escalation of the use of improvised explosion devices IEDs by our enemies as witnessed in the most recent military conflicts in Iraq and Afghanistan, there has been an increased awareness of closed head concussions, also commonly referred to as the mild TBI mTBI injury. The prevalence of this type of closed-head brain injury, estimated as afflicting over 300,000 deployed soldiers or approximately 30 of all deployed troops, has distinguished it as the signature injury of these military conflicts. Despite the enormity of this medical problem, and recognition of the importance for the need to quickly and accurately diagnose the event in the face of a limited clinical presentation i.e. no obvious wounds to the head, objective diagnostic tools and knowledge about what occurs in the brain following this type of injury are limited. Of equal concern is our lack of understanding the impact of multiple concussions on the brain and its consequences on the long term health of individuals. In order to address this problem, the WRAIR projectile concussive impact PCI model was developed under directive of the Combat Casualty Care Research Program CCCRP. In this Year 1 Annual Report, we describe engineering advancements made to the PCI injury model including projectile impact energyhead kinematics and impact location. In addition, we describe the current results of studies focused on characterizing the neuropathologic, molecular and neurobehavioral changes following a single PCI.

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  • Anatomy and Physiology
  • Medicine and Medical Research

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