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Related Concept Videos

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...
Cytotoxic Edema: Pathophysiology01:21

Cytotoxic Edema: Pathophysiology

Cytotoxic edema is a form of cerebral edema characterized by intracellular swelling of neurons, astrocytes, and other glial cells. It develops when the mechanisms responsible for maintaining ionic gradients across the cell membrane become impaired. Under normal physiological conditions, the sodium–potassium ATPase actively transports sodium ions out of the cell and potassium ions into the cell, preserving osmotic balance and enabling electrical signaling. This pump requires a continuous supply...
Cerebral Edema l: Introduction01:19

Cerebral Edema l: Introduction

Cerebral edema is a pathological increase in brain water content that disrupts intracranial pressure regulation and impairs neurological function. Because the cranial vault is rigid, even modest increases in tissue volume can compromise cerebral perfusion, distort neural structures, and initiate secondary injury. Cerebral edema develops through four principal mechanisms: vasogenic, cytotoxic, interstitial, and ionic.Vasogenic EdemaVasogenic edema arises from disruption of the blood–brain...
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...

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Related Experiment Video

Updated: Jun 10, 2026

A Revised Surgical Approach to Induce Endolymphatic Hydrops in the Guinea Pig
06:05

A Revised Surgical Approach to Induce Endolymphatic Hydrops in the Guinea Pig

Published on: June 4, 2020

Endolymphatic hydrops: pathophysiology and experimental models.

Alec N Salt1, Stefan K Plontke

  • 1Department of Otolaryngology, Washington University School of Medicine, Box 8115, 660 South Euclid Avenue, St Louis, MO 63110, USA. salta@ent.wustl.edu

Otolaryngologic Clinics of North America
|August 18, 2010
PubMed
Summary
This summary is machine-generated.

Endolymphatic hydrops is linked to Ménière disease, but its exact role requires further study. Understanding hydrops mechanisms may lead to effective treatments for this inner ear disorder.

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Surgical Induction of Endolymphatic Hydrops by Obliteration of the Endolymphatic Duct
11:49

Surgical Induction of Endolymphatic Hydrops by Obliteration of the Endolymphatic Duct

Published on: January 22, 2010

Related Experiment Videos

Last Updated: Jun 10, 2026

A Revised Surgical Approach to Induce Endolymphatic Hydrops in the Guinea Pig
06:05

A Revised Surgical Approach to Induce Endolymphatic Hydrops in the Guinea Pig

Published on: June 4, 2020

Surgical Induction of Endolymphatic Hydrops by Obliteration of the Endolymphatic Duct
11:49

Surgical Induction of Endolymphatic Hydrops by Obliteration of the Endolymphatic Duct

Published on: January 22, 2010

Area of Science:

  • Otolaryngology
  • Neuroscience
  • Pathology

Background:

  • Endolymphatic hydrops is implicated in Ménière disease, though its precise contribution and symptomatic correlation remain unclear.
  • A comprehensive understanding of hydrops pathogenesis, functional impact, and potential reversal is crucial for developing targeted Ménière disease therapies.

Purpose of the Study:

  • To elucidate the mechanisms of endolymphatic hydrops and its pathological consequences in the inner ear.
  • To explore the relationship between endolymphatic hydrops and electrophysiological changes affecting ear function.
  • To investigate the role of the endolymphatic sac in regulating endolymph volume and its connection to chronic hydrops.

Main Methods:

  • Utilizing animal models with induced endolymphatic hydrops to study pathological and electrophysiological changes.
  • Analyzing the histopathological and electrophysiological alterations associated with chronic endolymphatic hydrops.
  • Employing various experimental models to investigate specific interrelationships within hydrops pathogenesis.

Main Results:

  • Established the significant role of the endolymphatic sac in endolymph volume regulation.
  • Demonstrated a cascade of histopathological and electrophysiological changes linked to chronic endolymphatic hydrops.
  • Provided insights into the functional impact of hydrops on the inner ear through animal model studies.

Conclusions:

  • Further research into endolymphatic hydrops is essential for advancing Ménière disease treatment.
  • Controlling endolymphatic hydrops may offer a pathway to managing Ménière disease symptoms and preventing progressive ear damage.
  • The cyclical nature of Ménière symptoms suggests potential for treatments aimed at sustained remission by managing hydrops.