Significant Mitigation of Blast Overpressure Exposure During Training by Adjustment of Body Position as Demonstrated With Field Data.

Introduction: During training and deployment, service members (SMs) experience blast exposure, which may potentially negatively impact brain health in the short and long term. This article explores if blast exposure mitigation can be effectively achieved for four different weapon training scenarios that are being monitored as part of the CONQUER (COmbat and traiNing QUeryable Exposure/event Repository) program. The training scenarios considered here are a detonating cord linear (det linear) breaching charge, a water breaching charge, a shoulder-fired weapon, and a 120-mm mortar.

Dynamic monitoring of service members to quantify blast exposure levels during combat training using BlackBox Biometrics Blast Gauges: explosive breaching, shoulder-fired weapons, artillery, mortars, and 0.50 caliber guns.

CONQUER is a pilot blast monitoring program that monitors, quantifies, and reports to military units the training-related blast overpressure exposure of their service members. Overpressure exposure data are collected using the BlackBox Biometrics (B3) Blast Gauge System (BGS, generation 7) sensors mounted on the body during training. To date, the CONQUER program has recorded 450,000 gauge triggers on monitored service members.

Development of a Fast-Running Algorithm to Approximate Incident Blast Parameters Using Body-Mounted Sensor Measurements.

Introduction: The Office of Naval Research sponsored the Blast Load Assessment-Sense and Test program to develop a rapid, in-field solution that could be used by team leaders, commanders, and medical personnel to make science-based stand-down decisions for service members exposed to blast overpressure. However, a critical challenge to this goal was the reliable interpretation of surface pressure data collected by body-worn blast sensors in both combat and combat training scenarios. Without an appropriate standardized metric, exposures from different blast events cannot be compared and accumulated in a service member's unique blast exposure profile.

Initial Biphasic Fractional Anisotropy Response to Blast-Induced Mild Traumatic Brain Injury in a Mouse Model.

Introduction: Blast-induced mild traumatic brain injury was generated in a mouse model using a shock tube to investigate recovery and axonal injury from single blast.

Methods: A supersonic helium wave hit the head of anesthetized male young adult mice with a reflected pressure of 69 psi for 0.2 ms on Day 1.

Effects on Neurons and Hippocampal Slices by Single and Multiple Primary Blast Pressure Waves From Detonating Spherical Cyclotrimethylenetrinitramine (RDX) Explosive Charges.

Threshold shock-impulse levels required to induce cellular injury and cumulative effects upon single and/or multiple exposures are not well characterized. Currently, there are few in vitro experimental models with blast pressure waves generated by using real explosives in the laboratory for investigating the effects of primary blast-induced traumatic brain injury. An in vitro indoor experimental platform is developed using real military explosive charges to accurately represent battlefield blast exposure and to probe the effects of primary explosive blast on dissociated neurons and tissue slices.

Pathophysiology Associated with Traumatic Brain Injury: Current Treatments and Potential Novel Therapeutics.

Traumatic brain injury (TBI) is one of the leading causes of death of young people in the developed world. In the United States alone, 1.7 million traumatic events occur annually accounting for 50,000 deaths.

Clinical and imaging assessment of acute combat mild traumatic brain injury in Afghanistan.

Objective: To evaluate whether diffusion tensor imaging (DTI) will noninvasively reveal white matter changes not present on conventional MRI in acute blast-related mild traumatic brain injury (mTBI) and to determine correlations with clinical measures and recovery.

Methods: Prospective observational study of 95 US military service members with mTBI enrolled within 7 days from injury in Afghanistan and 101 healthy controls. Assessments included Rivermead Post-Concussion Symptoms Questionnaire (RPCSQ), Post-Traumatic Stress Disorder Checklist Military (PCLM), Beck Depression Inventory (BDI), Balance Error Scoring System (BESS), Automated Neuropsychological Assessment Metrics (ANAM), conventional MRI, and DTI.

Neuroanatomical predictors of awakening in acutely comatose patients.

Objective: Lateral brain displacement has been associated with loss of consciousness and poor outcome in a range of acute neurologic disorders. We studied the association between lateral brain displacement and awakening from acute coma.

Methods: This prospective observational study included all new onset coma patients admitted to the Neurosciences Critical Care Unit (NCCU) over 12 consecutive months.

Functional recovery after moderate/severe traumatic brain injury: a role for cognitive reserve?

Objective: To evaluate the hypothesis that educational attainment, a marker of cognitive reserve, is a predictor of disability-free recovery (DFR) after moderate to severe traumatic brain injury (TBI).

Methods: Retrospective study of the TBI Model Systems Database, a prospective multicenter cohort funded by the National Institute on Disability and Rehabilitation Research. Patients were included if they were admitted for rehabilitation after moderate to severe TBI, were aged 23 years or older, and had at least 1 year of follow-up.

Management of seizure disorders in the deployed environment: a treatment guide for the non-neurologist in theater.

Patients with seizures can present a common and challenging problem for medical providers in the deployed environment. Unfortunately, there is a paucity of controlled clinical trial data that can be used to formulate evidence-based guidelines for management. In an attempt to aid the non-neurologist deployed provider in the care of patients presenting with seizures, the authors describe two cases illustrative of common presentations.

Emergency neurological life support: intracranial hypertension and herniation.

Sustained intracranial hypertension and acute brain herniation are "brain codes," signifying catastrophic neurological events that require immediate recognition and treatment to prevent irreversible injury and death. As in cardiac arrest, evidence supports the organized implementation of a stepwise management algorithm. Because there are multiple etiologies and many treatments that can potentially reverse cerebral herniation, intracranial hypertension and herniation was chosen as an Emergency Neurological Life Support (ENLS) protocol.

Pathophysiology of battlefield associated traumatic brain injury.

As more data is accumulated from Operation Iraqi Freedom and Operation Enduring Freedom (OEF in Afghanistan), it is becoming increasing evident that traumatic brain injury (TBI) is a serious and highly prevalent battle related injury. Although traditional TBIs such as closed head and penetrating occur in the modern battle space, the most common cause of modern battle related TBI is exposure to explosive blast. Many believe that explosive blast TBI is unique from the other forms of TBI.

Confusion and SIRPIDs regress with parenteral lorazepam.

Stimulus-induced rhythmic, periodic or ictal discharges (SIRPIDs) are EEG epileptiform periodic discharges (PD) induced by arousal. SIRPIDs lie along an ictal-interictal continuum with debate regarding urgency of treatment. In a patient with SIRPIDs, aphasia and confusion, i.

Imaging brain trauma.

Purpose Of Review: Traumatic brain injury (TBI) is a leading cause of death and long-term cognitive and behavioral dysfunction in children and young adults, yet effective treatments are lacking, in part because critical aspects of TBI neurobiology and natural history are not understood. We review recent advances in neuroimaging and discuss how they are helping to address these fundamental gaps.

Recent Findings: Novel imaging methods provide detailed information on how TBI affects anatomical integrity (diffusion tensor imaging; voxel-based morphometry; susceptibility-weighted imaging, magnetization transfer imaging), metabolic activity (magnetic resonance spectroscopy), perfusion (positron emission tomography, perfusion computed tomography, perfusion magnetic resonance), and patterns of functional activation (functional magnetic resonance imaging).

Infant heart transplantation at Stanford: growth and neurodevelopmental outcome.

Objective: To evaluate the growth and neurodevelopmental outcome of 18 surviving Stanford patients who received heart transplantations before their second birthday.

Methods: We compared the growth and neurodevelopmental outcome of these 18 patients with a second group of age-matched comparison patients who underwent other heart surgery requiring cardiopulmonary bypass.

Results: Difficulties with growth and development were more common in the transplant group as were neurologic abnormalities.