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Related Concept Videos

Equilibrium and Balance01:15

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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...
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The Vestibular System01:29

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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.
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Updated: Mar 24, 2026

Estimating Vestibular Perceptual Thresholds Using a Six-Degree-Of-Freedom Motion Platform
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[VESTIBULAR FUNCTION AFTER REPEATED SPACE FLIGHTS].

I A Naumov, L N Kornilova, D O Glukhikh

    Aviakosmicheskaia I Ekologicheskaia Meditsina = Aerospace and Environmental Medicine
    |March 4, 2016
    PubMed
    Summary
    This summary is machine-generated.

    Repeated space flights (SF) shorten cosmonaut readaptation time. First-time space travelers show more vestibular disorders and altered otolith-semicircular canal interaction upon return.

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    Area of Science:

    • Space physiology
    • Vestibular system function
    • Neuroscience

    Context:

    • Investigates cosmonaut vestibular function after long-duration space flights (125-215 days) on the International Space Station.
    • Compares adaptation and readaptation patterns between repeated and maiden space missions.

    Purpose:

    • To evaluate the impact of repeated long-duration space flights on vestibular system recovery.
    • To identify differences in vestibular function and otolith-semicircular canal interaction between cosmonauts with varying flight histories.

    Summary:

    • Vestibular function testing was conducted on 32 cosmonauts before and after space flights using electro- and video-oculography.
    • Results indicate significantly shorter deadaptation periods after repeated long-duration space flights.
    • Cosmonauts undertaking their first microgravity missions exhibited a higher incidence of atypical vestibular disorders and altered otolith-semicircular canal interactions.

    Impact:

    • Suggests that the vestibular system may adapt to microgravity, leading to faster readaptation after subsequent missions.
    • Highlights potential risks and unique physiological challenges faced by astronauts during their initial spaceflights.
    • Informs strategies for astronaut training and health monitoring to mitigate vestibular dysfunction.