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Related Experiment Video

Updated: Dec 10, 2025

Using Eye-tracking to Assess the Relative Importance of Visual and Vestibular Input to Subcortical Motion Processing in the Roll Plane
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Postural Instability and Seasickness in a Motion-Based Shooting Simulation.

Kyle A Pettijohn, Dominick V Pistone, Andrew L Warner

    Aerospace Medicine and Human Performance
    |September 2, 2020
    PubMed
    Summary
    This summary is machine-generated.

    This study found that postural instability does not cause motion sickness in military personnel. Researchers manipulated participants' ability to adjust their posture during simulated motion, but this did not affect sickness symptoms.

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    Area of Science:

    • Human Factors
    • Military Medicine
    • Neuroscience

    Background:

    • Motion sickness poses significant challenges for military personnel operating in demanding environments.
    • Understanding the causes of motion sickness is crucial for maintaining operational effectiveness.
    • The study specifically investigated the postural instability theory of motion sickness.

    Purpose of the Study:

    • To investigate the role of postural instability in the development of motion sickness.
    • To determine if restricting postural adjustments exacerbates motion sickness symptoms.
    • To assess the impact of motion sickness on performance in a virtual reality task relevant to military training.

    Main Methods:

    • Twenty subjects participated in a virtual reality shooting task under two conditions: "Free" (allowing postural adjustments) and "Fixed" (restricting postural adjustments).
    • Postural instability was manipulated by either allowing or restricting subjects' ability to adjust their feet on a moving platform.
    • Motion sickness symptoms were assessed using the Simulator Sickness Questionnaire (SSQ), and shooting task performance was measured for accuracy.

    Main Results:

    • Motion sickness symptoms were mild in both conditions (SSQ scores: 14.41 for Free, 18.89 for Fixed), with no statistically significant difference between the Free and Fixed conditions.
    • Shooting task accuracy decreased by approximately 40% across both conditions, indicating no significant difference related to postural instability.
    • The findings did not provide support for postural instability as a primary cause of motion sickness.

    Conclusions:

    • Postural instability is not supported as a significant contributing factor to motion sickness based on this study's findings.
    • The results highlight the need to consider motion environments during military training simulations.
    • Further research may be needed to explore other potential causes and countermeasures for motion sickness in military contexts.