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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...

Mitral Valve Prolapse II: Assessment and Management

Mitral Valve Prolapse II: Assessment and Management

IntroductionA range of clinical features characterizes Mitral Valve Prolapse (MVP), but it is important to note that many individuals with MVP are asymptomatic and may remain so throughout their lives. For those who do exhibit symptoms, the following are the key clinical features:Palpitations: This is a common symptom where individuals feel an irregular or rapid heartbeat. Palpitations in MVP are often due to arrhythmias such as premature ventricular contractions or supraventricular tachycardia.

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...

Dysrhythmias II: Classification of Tachyarrhythmias

Dysrhythmias II: Classification of Tachyarrhythmias

Tachyarrhythmias are a type of dysrhythmia where the heart rate exceeds 100 beats per minute. Here are some common types of tachyarrhythmias:Sinus TachycardiaSinus tachycardia originates from increased impulses from the sinus node, leading to an elevated heart rate. It is often triggered by stress, fever, or exercise.Patients may experience palpitations, a sensation of a racing heart, dizziness, and chest discomfort.Causes and Risk Factors: Common causes include physical exertion, emotional...

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.

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Related Experiment Video

Updated: Jun 3, 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 vertigo.

Marcello Cherchi¹, Timothy C Hain

¹Department of Neurology, Northwestern University Feinberg School of Medicine, 303 East Chicago Avenue, Ward 10-185, Chicago, IL 60611, USA. m-cherchi2@md.northwestern.edu

Otolaryngologic Clinics of North America

|April 9, 2011

Summary

This summary is machine-generated.

Migraine-associated vertigo is a complex condition affecting balance and hearing. This overview aids otolaryngologists in diagnosing and managing this challenging vestibular disorder.

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Last Updated: Jun 3, 2026

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

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Published on: June 2, 2014

Measuring the Influence of Magnetic Vestibular Stimulation on Nystagmus, Self-Motion Perception, and Cognitive Performance in a 7T MRT

Measuring the Influence of Magnetic Vestibular Stimulation on Nystagmus, Self-Motion Perception, and Cognitive Performance in a 7T MRT

Published on: March 3, 2023

Area of Science:

Otolaryngology
Neurology
Vestibular Science

Background:

Migraine-associated vertigo (MAV) presents diagnostic challenges for otolaryngologists.
Understanding MAV pathophysiology is crucial for effective patient management.

Purpose of the Study:

To provide a comprehensive overview of MAV for practicing otolaryngologists.
To cover key aspects including definition, pathophysiology, clinical presentation, and management.

Main Methods:

Literature review and synthesis of current knowledge on MAV.
Discussion of diagnostic criteria and differential diagnoses.
Outline of treatment strategies and prognostic factors.

Main Results:

MAV is characterized by episodic vertigo in patients with a history of migraine.
Clinical features can be diverse, requiring careful evaluation.
Vestibular and otologic testing aid in diagnosis but are not always definitive.

Conclusions:

Accurate diagnosis of MAV requires integrating patient history, clinical findings, and diagnostic tests.
Multidisciplinary management approaches are often necessary for optimal outcomes.
Further research is needed to fully elucidate MAV pathophysiology and refine treatment protocols.