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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.

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...

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Related Experiment Video

Updated: Dec 31, 2025

Estimating Vestibular Perceptual Thresholds Using a Six-Degree-Of-Freedom Motion Platform

Estimating Vestibular Perceptual Thresholds Using a Six-Degree-Of-Freedom Motion Platform

Published on: August 4, 2022

Differences Between Physical vs. Virtual Evoked Vestibular Responses.

Mehrangiz Ashiri¹, Brian Lithgow², Abdelbaset Suleiman²

¹Biomedical Engineering Program, University of Manitoba, Winnipeg, MB, R3T 2N2, Canada. ashirim@myumanitoba.ca.

Annals of Biomedical Engineering

|January 10, 2020

Summary

This summary is machine-generated.

Electrovestibulography (EVestG) revealed differences in vestibular responses between physical and virtual reality tilts. Physical tilts, especially with eyes closed, showed distinct EVestG patterns compared to virtual reality stimuli.

Keywords:

Afferent Electrovestibulography (EVestG)Virtual reality Visual

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Area of Science:

Neuroscience
Vestibular System Research
Sensory Integration

Background:

Electrovestibulography (EVestG) is a technology designed to measure vestibular activity at the peripheral level.
Understanding how the brain processes vestibular and visual information is crucial for diagnosing and treating balance disorders.

Purpose of the Study:

To compare vestibular responses measured by EVestG to physical and virtual reality sensory inputs.
To investigate the influence of visual conditions (eyes-open vs. eyes-closed) on these responses.

Main Methods:

Twenty-seven healthy participants underwent EVestG recordings during physical back-forward tilts (eyes-open/closed) and a virtual reality replica (eyes-open).
Analysis focused on two EVestG features: average field potential (FP) and the distribution of time intervals between FPs.

Main Results:

Eyes-closed physical tilts elicited wider FP response curves and longer time intervals between FPs compared to virtual reality tilts.
Significant differences in FP time intervals were observed between eyes-open and eyes-closed physical tilts.
Vestibular afferent activity modulation was measurably smaller for virtual than physical stimulation.

Conclusions:

Vestibular and visual inputs evoke distinct EVestG responses.
The difference between physical and virtual vestibular responses is influenced by whether the eyes are open or closed.
EVestG can differentiate between physical and virtual vestibular stimulation, indicating differential modulation of vestibular afferent activity.