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Equilibrium and Balance

Equilibrium and Balance

The inner ear assumes dual functionalities of auditory perception and equilibrium maintenance. The vestibule is the organ responsible for balance. This organ contains mechanoreceptors, specifically hair cells, endowed with stereocilia, which aid in deciphering information regarding the position and motion of our heads. Two intrinsic components, the utricle and saccule, help perceive head position, while the semicircular canals track head movement. Neurological messages initiated in the...

Pathophysiology of Vomiting

Pathophysiology of Vomiting

Vomiting is a complex physiological response to expel harmful or irritating substances from the body. It's a defensive mechanism triggered by stimuli like poisons, microbial toxins, cytotoxic drugs, and mechanical abdominal distension. The process is centrally coordinated by the vomiting (or emetic) center located in the medulla of the brainstem. This area, rich in muscarinic M1, histamine H1, neurokinin 1 (NK1), and serotonin 5-HT3 receptors, coordinates the act of vomiting through interaction...

The Vestibular System

The Vestibular System

The vestibular system is a set of inner ear structures that provide a sense of balance and spatial orientation. This system is comprised of structures within the labyrinth of the inner ear, including the cochlea and two otolith organs—the utricle and saccule. The labyrinth also contains three semicircular canals—superior, posterior, and horizontal—that are oriented on different planes.

Increased Intracranial Pressure ll: Pathophysiology

Increased Intracranial Pressure ll: Pathophysiology

Increased intracranial pressure (ICP) refers to a potentially life-threatening rise in pressure inside the skull. This usually happens when there is a major change in the volume of brain tissue, blood, or cerebrospinal fluid (CSF) — the three components inside the skull. According to the Monro-Kellie doctrine, if the volume of one component increases, the volumes of the other components must decrease to maintain normal pressure. If this does not happen, ICP rises.The process often begins with...

Cerebral Edema ll: Pathophysiology

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...

Increased Intracranial Pressure l: Introduction

Increased Intracranial Pressure l: Introduction

Intracranial hypertension is a sustained elevation of intracranial pressure (ICP) above 22 mm Hg. In supine adults, normal ICP is ~7–15 mm Hg.The rigid, nonexpandable cranium contains three components—brain tissue, blood, and cerebrospinal fluid (CSF)—that total ~1,700 mL in a typical adult: 1,400 mL brain (~80%), 150 mL blood (~10%), and 150 mL CSF (~10%). According to the Monro–Kellie doctrine, total intracranial volume is effectively fixed. When one component expands, CSF and venous blood...

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Related Experiment Video

Updated: Jun 30, 2026

3D-Neuronavigation In Vivo Through a Patient's Brain During a Spontaneous Migraine Headache

3D-Neuronavigation In Vivo Through a Patient's Brain During a Spontaneous Migraine Headache

Published on: June 2, 2014

Migraine-associated vestibulopathy.

Julie Honaker¹, Ravi N Samy

¹Division of Audiology, Mayo Clinic, Rochester, Minnesota, USA.

Current Opinion in Otolaryngology & Head and Neck Surgery

|September 18, 2008

Summary

This summary is machine-generated.

Migraine-associated vestibulopathy is increasingly diagnosed, presenting with vertigo and imbalance. Effective treatments include lifestyle changes, medications, and vestibular therapy, though further research is needed.

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3D-Neuronavigation In Vivo Through a Patient's Brain During a Spontaneous Migraine Headache

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Published on: June 2, 2014

Using Eye-tracking to Assess the Relative Importance of Visual and Vestibular Input to Subcortical Motion Processing in the Roll Plane

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Published on: August 22, 2025

Area of Science:

Neurology
Otolaryngology
Vestibular Disorders

Background:

Increasing incidence of vestibular disorders linked to migraine.
Migraine-associated vestibulopathy is a growing clinical concern for otologists.
Understanding the pathophysiology is crucial for diagnosis and treatment.

Purpose of the Study:

Review latest developments in migraine-associated vestibulopathy.
Discuss incidence, symptoms, diagnosis, and treatment strategies.
Highlight the need for improved diagnostic and therapeutic approaches.

Main Methods:

Review of current literature on migraine-associated vestibulopathy.
Analysis of emerging evidence supporting its classification.
Discussion of diagnostic challenges, including its status as a diagnosis of exclusion.

Main Results:

Symptoms include vertigo, dysequilibrium, imbalance, and lightheadedness.
Pathophysiology involves both peripheral and central deficits.
Emerging evidence supports migraine-associated vestibulopathy as a migraine subclassification.

Conclusions:

Treatment is effective, combining lifestyle modifications, medications, and vestibular therapy.
Identifying and reducing migraine triggers is key.
Further research is essential for a comprehensive understanding and improved management.