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Related Experiment Video

Updated: May 13, 2025

Testing of all Six Semicircular Canals with Video Head Impulse Test Systems

Testing of all Six Semicircular Canals with Video Head Impulse Test Systems

Published on: April 18, 2019

Video head impulse test and seasickness susceptibility.

Yoni Evgeni Gutkovich^1,2, Anna Jamison¹, Daniel Lagami¹

¹Motion Sickness and Human Performance Laboratory, The Israel Naval Medical Institute, IDF Medical Corps, Haifa, Israel.

Experimental Brain Research

|April 16, 2025

Summary

Seasickness susceptibility may be identified using a specific ratio from the video head impulse test (vHIT). This test measures the vestibulo-ocular reflex (VOR) in semicircular canals, offering a new diagnostic parameter.

Keywords:

Motion sickness Seasickness susceptibility Vestibular test Video head impulse test

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Area of Science:

Neuroscience
Ophthalmology
Vestibular System Research

Background:

Seasickness significantly impacts crew well-being, with potential links to car sickness diagnosis via vestibular tests.
The video head impulse test (vHIT) assesses semicircular canal (SCC) function, a key component of the vestibulo-ocular reflex (VOR).
Differences in VOR gain between anterior/posterior and lateral SCCs may correlate with seasickness susceptibility.

Purpose of the Study:

To investigate if standard vHIT parameters can differentiate between individuals susceptible and non-susceptible to seasickness.
To explore novel vHIT parameters for predicting seasickness susceptibility.

Main Methods:

Eighty-six maritime military personnel were assessed using vHIT.
Participants were classified as seasickness-susceptible or non-susceptible based on Golding scores and motion sickness scores.
Standard vHIT parameters (vertical VOR gains, asymmetry ratios, corrective saccades) and a novel ratio (anterior to lateral vHIT mean VOR gain) were analyzed.

Main Results:

Standard vHIT parameters did not significantly differentiate between susceptible and non-susceptible groups.
A significantly lower left ipsilateral anterior to lateral vHIT mean VOR gain ratio was observed in the seasickness-susceptible group (P=0.0187).
This specific ratio showed a moderate effect size (Cohen's d = 0.527543).

Conclusions:

Standard vHIT parameters are insufficient for diagnosing seasickness susceptibility.
The anterior to lateral vHIT mean VOR gain ratio presents a potential new biomarker for assessing seasickness susceptibility.
This finding warrants consideration as an additional vHIT parameter in clinical evaluations.