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Ground based eccentric chair experiments.

J Wetzig1, K Hofstetter-Degen, R J von Baumgarten

  • 1Physiologisches Institut, Johannes-Gutenberg-Universitat Mainz, Germany.

Acta Astronautica
|July 1, 1994
PubMed
Summary
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Space flight significantly impacts the vestibular system, affecting perception of verticality. Recovery of the gravitoinertial vector

Area of Science:

  • Neuroscience
  • Space Physiology
  • Human Factors

Background:

  • The vestibular system is crucial for spatial orientation.
  • Space flight is known to cause sensory-motor alterations.
  • Understanding post-flight sensory recalibration is important for astronaut health.

Purpose of the Study:

  • To investigate the effect of space flight on the perception of subjective vertical.
  • To determine the time course of vestibular system recalibration after space flight.

Main Methods:

  • Eccentric rotation was used to assess the perception of subjective vertical.
  • Measurements were taken before, immediately after, and several days following space flight.

Main Results:

Related Experiment Videos

  • Perception of subjective vertical was largely unrelated to the gravitoinertial vector shortly after space flight.
  • A noticeable relation to the gravitoinertial vector re-established after four days post-flight in one subject.
  • Normal correspondence was restored six days after flight.

    • Conclusions:

    • Vestibular deconditioning training prior to flight may lead to suppression of vestibular information.
    • Space flight experience can cause continued disregard for vestibular input even after returning to Earth.
    • The vestibular system requires time to recalibrate sensory information post-space flight.