Semicircular Canal Testing
Semicircular Canal Testing - Related Videos
08:38
Testing of all Six Semicircular Canals with Video Head Impulse Test Systems
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Cited by 26 •
2019
This protocol describes how to correctly perform the video head impulse test with two separate test systems commonly used worldwide. Both the 2D and 3D video head impulse test methods are described.
03:52
Posterior Semicircular Canal Approach for Inner Ear Gene Delivery in Neonatal Mouse
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Cited by 37 •
2018
In this study, we describe the posterior semicircular canal approach as a reliable method for inner ear gene delivery in neonatal mice. We show that gene delivery through the posterior semicircular canal is able to perfuse the entire inner ear.
09:05
Balance and Coordination Testing
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2023
Balance and coordination are critical components involved in the control of movement. Many sensory receptors and neural processing units are required to help individuals maintain balance while performing various activities. Deficits in balance and coordination occur in patients suffering from movement disorders or due to aging. Therefore, scientists are trying to understand the pathophysiology behind these conditions. One way to do that is by using rodent models and testing them on behavioral...
06:26
Capturing Flow-weighted Water and Suspended Particulates from Agricultural Canals During Drainage Events
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Cited by 2 •
2017
Nutrients present in particulate form can contribute significantly to the overall loads in agricultural drainage waters. This study describes a novel method to capture flow-weighted water and suspended particulates from farm canal drainage over the entire duration of the drainage event.
07:52
An Automated System for Sound Localization Testing in Hearing-Impaired Listeners
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2026
This protocol introduces an automated sound localization testing system with precise loudspeaker placement and integrated response analysis, validated in normal-hearing participants and participants with single-sided deafness. It provides a reproducible method to assess spatial hearing and supports functional classification using the International Classification of Functioning, Disability and Health (ICF) framework.
FAQs
The vestibulo-ocular reflex links signals from the semicircular canals with compensatory eye movements during head rotation. Clinicians record these eye movements to assess whether canal stimulation produces an appropriate response that supports gaze stability. Reduced or asymmetric responses can indicate impaired canal function and provide objective information about vestibular contributions to dizziness or balance dysfunction.
Controlled head movements, temperature changes in the ear, and rotational motion provide different ways to stimulate or measure semicircular canal function. Using these controlled conditions allows clinicians to examine vestibular responses while recording the resulting eye movements. The selected stimulus can therefore help characterize canal performance under a defined form of vestibular activation.
Reduced responses may suggest that one or more semicircular canals are functioning below expected levels, while asymmetry indicates unequal function between sides. These findings can support recognition of unilateral vestibular weakness and other vestibular causes of dizziness. Interpretation also helps clinicians distinguish peripheral vestibular disorders from causes that do not primarily arise from the inner ear.
During testing, clinicians apply a controlled vestibular stimulus and observe the eye movements generated by the vestibulo-ocular reflex. The recorded responses are then considered in relation to the stimulus and compared for evidence of reduced or asymmetric canal function. This approach converts the inner ear's response to head-motion-related stimulation into clinically useful information about balance and gaze control.
A typical assessment uses a controlled stimulus, such as head movement, ear temperature change, or rotational motion, followed by measurement of the resulting eye movements. Clinicians examine the vestibulo-ocular reflex and look for reduced or asymmetric responses. The findings can then be used to support diagnosis, follow changes over time, or guide vestibular rehabilitation planning.
Clinicians may use these assessments when evaluating vertigo, balance dysfunction, or suspected unilateral vestibular weakness. The results can contribute to diagnosis, help monitor a known vestibular problem, and inform rehabilitation planning. Because the findings may help distinguish peripheral vestibular disorders from other causes of dizziness, testing can add objective evidence to the broader medical evaluation.