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Related Concept Videos

Hepatic Encephalopathy01:29

Hepatic Encephalopathy

DefinitionHepatic encephalopathy is a reversible neurologic syndrome that results from advanced liver dysfunction or portosystemic shunting. It leads to disturbances in cognition, behavior, and motor function due to the brain’s exposure to gut-derived toxins that the liver fails to detoxify.EtiologyThis condition develops either in the setting of acute fulminant hepatitis or progressively during chronic liver disease, such as cirrhosis and portal hypertension. Portosystemic shunting—including...
Encephalitis ll: Pathophysiology01:26

Encephalitis ll: Pathophysiology

Encephalitis is inflammation of the brain parenchyma caused by direct viral invasion or immune-mediated mechanisms triggered by infections or tumors. Both processes lead to neuronal injury, disrupted neurotransmission, and diverse neurological symptoms, often with overlapping clinical and pathological features.Autoimmune EncephalitisIn autoimmune encephalitis, antibodies target neuronal antigens on cell surfaces, synapses, or within neurons. A key example is anti-NMDAR encephalitis, which can...
Bacterial Meningitis II: Pathophysiology01:26

Bacterial Meningitis II: Pathophysiology

Bacterial meningitis typically begins when pathogens such as Neisseria meningitidis and Streptococcus pneumoniae colonize the nasopharynx and invade the bloodstream. This process is facilitated by bacterial virulence factors, such as polysaccharide capsules, which resist phagocytosis and complement-mediated killing. Less commonly, bacteria reach the central nervous system via contiguous spread from infections like otitis media or sinusitis, through congenital or acquired dural defects, or...
Brain Abscess l: Introduction01:26

Brain Abscess l: Introduction

A brain abscess is a focal, intracerebral infection characterized by a localized collection of pus within the brain parenchyma, resulting from microbial invasion and the body’s inflammatory response. It progresses through stages: early and late cerebritis, followed by early and late capsule formation, reflecting tissue destruction, immune response, and eventual encapsulation.Etiology and PathogenesisCausative organisms vary with source and host factors, often involving polymicrobial infections,...
Encephalitis l: Introduction01:19

Encephalitis l: Introduction

Encephalitis is inflammation of the brain parenchyma, most often due to infections or autoimmune processes. It presents with neuropsychiatric features such as fever, altered mental status, behavioral changes, cognitive dysfunction, seizures, focal deficits, and sometimes autonomic instability. In some cases, the meninges are also involved, resulting in meningoencephalitis.Infectious CausesInfectious encephalitis is most commonly viral but can also result from bacterial, fungal, or parasitic...
Cerebral Edema ll: Pathophysiology01:22

Cerebral Edema ll: Pathophysiology

Vasogenic edema is a major form of cerebral edema characterized by abnormal accumulation of fluid in the brain’s extracellular space due to disruption of the blood–brain barrier (BBB). The BBB is a specialized structure composed of endothelial cells connected by tight junctions, supported by astrocytic endfeet and a basement membrane. Under normal conditions, it tightly regulates the movement of ions, proteins, and solutes between the bloodstream and brain parenchyma. When this barrier loses...

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Related Experiment Video

Updated: Jun 6, 2026

Analyzing the Permeability of the Blood-Brain Barrier by Microbial Traversal through Microvascular Endothelial Cells
06:26

Analyzing the Permeability of the Blood-Brain Barrier by Microbial Traversal through Microvascular Endothelial Cells

Published on: February 14, 2020

Septic-associated encephalopathy--everything starts at a microlevel.

Tarek Sharshar1, Andrea Polito, Anthony Checinski

  • 1Department of Intensive Care Medicine, Raymond Poincaré teaching Hospital and University of Versailles Saint-Quentin en Yvelines, 104 Boulevard Raymond Poincaré, 92380 Garches, France. tarek.sharshar@rpc.aphp.fr

Critical Care (London, England)
|November 12, 2010
PubMed
Summary
This summary is machine-generated.

Sepsis-associated encephalopathy involves brain inflammation, potentially starting with blood vessel issues. Further research is needed to confirm its presence in patients and explore treatment options.

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Area of Science:

  • Neuroscience
  • Critical Care Medicine
  • Pathophysiology

Background:

  • Sepsis-associated encephalopathy (SAE) significantly increases patient mortality and morbidity.
  • The exact mechanisms of SAE are not fully understood, but neuroinflammation is implicated.
  • Evidence suggests a sequence involving endothelial activation, blood-brain barrier changes, and neuronal dysfunction.

Discussion:

  • Microcirculatory dysfunction, stemming from endothelial activation, is a proposed early pathogenic event in SAE.
  • It remains unclear if microcirculatory dysfunction occurs in septic patients.
  • The link between microcirculatory dysfunction and SAE's clinical manifestations requires investigation.

Key Insights:

  • SAE pathophysiology involves neuroinflammation and endothelial activation.
  • Microcirculatory dysfunction is a potential early step in SAE.
  • Clinical relevance and treatability of microcirculatory dysfunction in SAE are unknown.

Outlook:

  • Investigate the presence of microcirculatory dysfunction in septic patients.
  • Determine if microcirculatory dysfunction correlates with SAE clinical features.
  • Explore therapeutic strategies targeting microcirculatory dysfunction for SAE treatment.