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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...

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.

Auditory Perception

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...

Anatomy of the Ear

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 Cochlea

The Cochlea

The cochlea is a coiled structure in the inner ear that contains hair cells—the sensory receptors of the auditory system. Sound waves are transmitted to the cochlea by small bones attached to the eardrum called the ossicles, which vibrate the oval window that leads to the inner ear. This causes fluid in the chambers of the cochlea to move, vibrating the basilar membrane.

Hearing

Hearing

When we hear a sound, our nervous system is detecting sound waves—pressure waves of mechanical energy traveling through a medium. The frequency of the wave is perceived as pitch, while the amplitude is perceived as loudness.

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Related Experiment Video

Updated: May 10, 2026

Stochastic Noise Application for the Assessment of Medial Vestibular Nucleus Neuron Sensitivity In Vitro

Stochastic Noise Application for the Assessment of Medial Vestibular Nucleus Neuron Sensitivity In Vitro

Published on: August 28, 2019

Vestibular hearing and neural synchronization.

Seyede Faranak Emami¹, Ahmad Daneshi

¹Department of Audiology, School of Rehabilitation, Hamadan University of Medical Sciences, Hamadan 16657-696, Iran.

ISRN Otolaryngology

|June 1, 2013

Summary

This summary is machine-generated.

Vestibular hearing, measured by cervical vestibular evoked myogenic potentials (cVEMPs), correlates with neural synchronization assessed by slow wave Auditory Brainstem Responses (sABR). Improved vestibular hearing in patients is linked to enhanced neural synchronization.

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

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Published on: August 30, 2019

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Last Updated: May 10, 2026

Stochastic Noise Application for the Assessment of Medial Vestibular Nucleus Neuron Sensitivity In Vitro

Stochastic Noise Application for the Assessment of Medial Vestibular Nucleus Neuron Sensitivity In Vitro

Published on: August 28, 2019

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

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

Published on: August 30, 2019

Area of Science:

Neuroscience
Audiology
Otolaryngology

Background:

Vestibular hearing, reflecting saccular auditory sensitivity, operates in the low-frequency range.
Auditory brainstem response (ABR) amplitude is influenced by neural synchronization, which is most effective at low frequencies.

Purpose of the Study:

To investigate the correlation between vestibular hearing, assessed via cVEMPs, and neural synchronization, evaluated using sABR.
To compare vestibular hearing and neural synchronization in dizzy patients versus healthy controls.

Main Methods:

A case-control study involving 22 dizzy patients and 20 healthy controls.
Evaluations included Pure Tone Audiometry (PTA), Impedance audiometry (IA), Videonystagmography (VNG), fast wave ABR (fABR), sABR, and cVEMPs.

Main Results:

Dizzy patients exhibited abnormal cVEMPs (indicating insecure vestibular hearing) and abnormal sABR (indicating decreased neural synchronization) in affected ears.
Significant differences (P < 0.05) were observed in cVEMP findings between affected ears, unaffected ears, and healthy individuals.

Conclusions:

Abnormalities in cVEMPs and sABR were found in dizzy patients, suggesting impaired vestibular hearing and neural synchronization.
Safe vestibular hearing appears to be effective in improving neural synchronization.