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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...
Anatomy of the Ear01:16

Anatomy of the Ear

Auditory sensation, commonly called hearing, involves the transformation of sonic waves into neural impulses facilitated by the structures of the auditory organ. The prominent, flesh-like structure on the side of the head, called the auricle, directs sound waves towards the auditory canal. The auricle is often mislabeled as the pinna, a term more aligned with mobile structures like a feline's external ear. The auditory canal penetrates the cranium via the external auditory meatus of the...
The Auditory Ossicles01:11

The Auditory Ossicles

The auditory ossicles of the middle ear transmit sounds from the air as vibrations to the fluid-filled cochlea. The auditory ossicles consist of two malleus (hammer) bones, two incus (anvil) bones, and two stapes (stirrups), one on each side. These bones develop during the fetal stage and are the ones to ossify first. They are fully mature at birth and do not grow afterward.
The aptly named stapes look very much like a stirrup. The three ossicles are unique to mammals, and each plays a role in...
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...
Auditory Perception01:17

Auditory Perception

The auditory system is essential for sound perception, utilizing various critical structures. When sound waves enter the outer ear, they travel through the ear canal and cause the eardrum to vibrate. These vibrations are then transmitted to the middle ear, where three tiny bones – the malleus, incus, and stapes – amplify the sound. This amplification is crucial, as it ensures that the sound vibrations are strong enough to be conveyed to the inner ear. These vibrations then reach the cochlea, a...

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Related Experiment Video

Updated: May 17, 2026

Estimating Vestibular Perceptual Thresholds Using a Six-Degree-Of-Freedom Motion Platform
06:31

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

Published on: August 4, 2022

The anatomical and physiological framework for vestibular prostheses.

Stephen M Highstein1, Gay R Holstein

  • 1Marine Biological Laboratory, Woods Hole, Massachusetts 02543, USA. shighstein@mbl.edu

Anatomical Record (Hoboken, N.J. : 2007)
|October 10, 2012
PubMed
Summary
This summary is machine-generated.

This review explores the vestibular system

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

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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

Related Experiment Videos

Last Updated: May 17, 2026

Estimating Vestibular Perceptual Thresholds Using a Six-Degree-Of-Freedom Motion Platform
06:31

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

Published on: August 4, 2022

Three Dimensional Vestibular Ocular Reflex Testing Using a Six Degrees of Freedom Motion Platform
10:12

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

Published on: May 23, 2013

Using Unidirectional Rotations to Improve Vestibular System Asymmetry in Patients with Vestibular Dysfunction
05:02

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

Published on: August 30, 2019

Area of Science:

  • Neuroscience
  • Biomedical Engineering
  • Otolaryngology

Background:

  • The vestibular system, crucial for balance and spatial orientation, is complex.
  • Pathologies affecting the vestibular system lead to debilitating balance disorders.
  • Current treatments for vestibular dysfunction are limited, necessitating novel solutions.

Purpose of the Study:

  • To review the structure and function of the vestibular system.
  • To identify requirements for designing a functional vestibular prosthesis.
  • To guide the development of devices restoring balance and equilibrium.

Main Methods:

  • Comprehensive review of existing literature on vestibular system anatomy and physiology.
  • Analysis of transduction mechanisms in the peripheral labyrinth (inner ear).
  • Examination of central vestibular pathways and effector functions.

Main Results:

  • The peripheral labyrinth accurately transduces head motion and gravity.
  • Detailed understanding of vestibular nerve connections and brainstem nuclei is essential.
  • Key effector pathways (vestibulo-ocular, vestibulo-spinal, etc.) are identified for prosthetic targeting.

Conclusions:

  • Restoring balance requires replicating the natural transduction of head motion and gravity.
  • Direct activation of vestibular nerve fibers is the primary goal for prosthesis design.
  • This review provides a foundational understanding for developing effective vestibular prostheses.