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Related Concept Videos

The Vestibular System01:29

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.
Equilibrium and Balance01:15

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...
Major Somatic Sensory Pathways01:28

Major Somatic Sensory Pathways

Sensory impulses related to touch, pressure, vibration, and proprioception from various body parts, such as the limbs, trunk, neck, and posterior head, travel to the cerebral cortex through the posterior column-medial lemniscus pathway. The pathway’s name derives from the two white-matter tracts that convey the impulses: the spinal cord's posterior column and the brainstem's medial lemniscus. First-order sensory neurons extend their axons into the spinal cord, forming the posterior columns...
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...
Indirect Motor Pathways01:22

Indirect Motor Pathways

The indirect motor or extrapyramidal pathways originate in the brainstem, the lower portion of the brain that connects it to the spinal cord. They consist of several distinct tracts, each with specialized functions. The four main tracts of the indirect motor pathways are the vestibulospinal tract, the reticulospinal tract, the tectospinal tract, and the rubrospinal tract.
The vestibulospinal tract originates in the vestibular nuclei of the brainstem. The vestibular system detects changes in...

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Related Experiment Video

Updated: May 26, 2026

Using Unidirectional Rotations to Improve Vestibular System Asymmetry in Patients with Vestibular Dysfunction
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Using Unidirectional Rotations to Improve Vestibular System Asymmetry in Patients with Vestibular Dysfunction

Published on: August 30, 2019

Compensation following bilateral vestibular damage.

Andrew A McCall1, Bill J Yates

  • 1Department of Otolaryngology, University of Pittsburgh Pittsburgh, PA, USA.

Frontiers in Neurology
|December 31, 2011
PubMed
Summary

Bilateral vestibular hypofunction (BVH) impairs balance, vision, and spatial memory. While some functions recover via non-vestibular inputs, others remain permanently lost, necessitating new therapeutic strategies.

Keywords:
balance disorderbilateral vestibular hypofunctionoscillopsiapostural controlvestibular–autonomic responsevestibulo-ocular reflex

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10:12

Three Dimensional Vestibular Ocular Reflex Testing Using a Six Degrees of Freedom Motion Platform

Published on: May 23, 2013

Area of Science:

  • Neuroscience
  • Otolaryngology
  • Vestibular System

Background:

  • Bilateral vestibular hypofunction (BVH) is understudied compared to unilateral damage.
  • BVH causes significant clinical issues: impaired balance, blood pressure instability, visual targeting difficulties, and spatial/navigational deficits.

Purpose of the Study:

  • To review current understanding of BVH, focusing on compensatory mechanisms and potential therapeutic strategies.
  • To highlight the need for more patient data early in the disease process.

Main Methods:

  • Review of animal studies on BVH compensation.
  • Analysis of clinical problems associated with BVH in human patients.
  • Discussion of proposed prosthetic devices for BVH treatment.

Main Results:

  • Animal studies show rapid amplification of non-labyrinthine inputs, aiding postural recovery within 10 days.
  • Vestibulo-ocular reflex loss and spatial cognition deficits appear permanent in animals with BVH.
  • Human compensatory mechanisms remain largely inferred due to limited early-stage patient data.

Conclusions:

  • Translating animal compensation findings into clinical therapies is crucial for improving BVH treatment.
  • Two prosthetic approaches (tactile and electrical vestibular stimulation) are proposed, but their comparative efficacy and combination potential require further investigation.