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Related Concept Videos

Traumatic Brain Injury l: Introduction01:28

Traumatic Brain Injury l: Introduction

DefinitionTraumatic brain injury, or TBI, is a disturbance of normal brain function induced by an external mechanical force, such as a direct blow to the head or a penetrating injury. It can affect both brain structure and function, producing a wide range of clinical outcomes. TBI is a heterogeneous condition, meaning its effects may differ based on the type, location, and severity of the injury.Basis of ClassificationTBI is classified based on severity, injury mechanism, or pathophysiology. In...
Spinal Cord Injury ll: Pathophysiology01:14

Spinal Cord Injury ll: Pathophysiology

Spinal cord injury progresses through two interconnected phases: primary injury and secondary injury.Primary InjuryPrimary injury happens at the moment of trauma and involves immediate mechanical damage to the spinal cord.Compression happens when broken vertebrae, herniated discs, or accumulating blood (such as a hematoma) press directly against the spinal cord, distorting its normal shape and function. In cases of contusion, the cord is bruised by a blunt force (like penetrating injuries or...
Hemorrhagic Stroke ll: Pathophysiology01:29

Hemorrhagic Stroke ll: Pathophysiology

A hemorrhagic stroke develops when a cerebral blood vessel ruptures, allowing blood to escape into the surrounding brain tissue, as in intracerebral hemorrhage (ICH), or into the subarachnoid space, as in subarachnoid hemorrhage (SAH). Because the skull is a rigid compartment, the sudden presence of extravascular blood rapidly increases intracranial pressure and compresses adjacent neural structures, leading to immediate tissue injury and impaired cerebral perfusion.Mass Effect and Primary...
Secondary Spinal Cord Injury llI: Pathophysiology01:25

Secondary Spinal Cord Injury llI: Pathophysiology

Early Ischemia and Ionic ImbalanceWithin minutes of spinal cord injury, a secondary cascade begins, progressing over hours to weeks. Vascular damage reduces blood flow, causing ischemia and mitochondrial dysfunction. ATP depletion leads to ion pump failure, membrane depolarization, sodium influx, potassium efflux, and water accumulation, resulting in cellular swelling. Increased intracellular calcium further disrupts mitochondria and accelerates cellular injury.Excitotoxicity and Neuronal...

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Related Experiment Video

Updated: May 28, 2026

A Novel In Vitro Model of Blast Traumatic Brain Injury
08:59

A Novel In Vitro Model of Blast Traumatic Brain Injury

Published on: December 21, 2018

Brain injuries from blast.

Cameron R Bass1, Matthew B Panzer, Karen A Rafaels

  • 1Department of Biomedical Engineering, Duke University, 136 Hudson Hall, Durham, NC 27708, USA. dale.bass@duke.edu

Annals of Biomedical Engineering
|October 21, 2011
PubMed
Summary
This summary is machine-generated.

Blast traumatic brain injury (TBI) is a battlefield reality. Enhanced body armor may increase TBI risk by preventing lung injury, highlighting the need for better diagnostics and animal models.

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Last Updated: May 28, 2026

A Novel In Vitro Model of Blast Traumatic Brain Injury
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Published on: December 21, 2018

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Area of Science:

  • Neurology
  • Military Medicine
  • Biomedical Engineering

Background:

  • Blast exposure is a significant concern in modern warfare, leading to traumatic brain injury (TBI).
  • Understanding the unique mechanisms and clinical presentations of blast TBI is crucial for effective diagnosis and treatment.
  • Existing research presents several challenges, including differentiating blast TBI from PTSD and accurately scaling animal models to human responses.

Purpose of the Study:

  • To address fundamental questions regarding blast TBI in humans.
  • To explore the physical correlates and primary injury mechanisms of blast TBI.
  • To investigate the challenges in clinical differentiation from PTSD and the scaling of animal models to human blast exposures.

Main Methods:

  • Review of clinical practice and experimental models.
  • Analysis of injury risk functions based on blast overpressure time histories.
  • Examination of animal model methodologies and blast exposure conditions.

Main Results:

  • Evidence suggests blast TBI occurs on the modern battlefield, with mild brain injuries at intensities similar to pulmonary injury thresholds.
  • Enhanced thoracic protection may shift injury patterns towards TBI.
  • Significant uncertainties remain regarding comprehensive injury assessment, pathophysiology, PTSD differentiation, and interspecies scaling.

Conclusions:

  • Blast TBI is a distinct injury entity on the modern battlefield.
  • Further research is needed to refine diagnostic criteria, understand pathophysiology, and improve the translatability of animal models.
  • Optimizing experimental designs is critical for accurate blast TBI research.