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Related Experiment Videos

Responses to eccentric rotation in two space-bound subjects

J Wetzig1, K Hofstetter-Degen, R von Baumgarten

  • 1Arbeitsgruppe Luft- und Raumfahrtmedizin, Johannes-Gutenberg Universität, Mainz.

The Clinical Investigator
|September 1, 1993
PubMed
Summary

Astronauts may suppress vestibular information during space flight, impacting their sense of verticality. Recovery of the sense of verticality varied among individuals post-flight.

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Area of Science:

  • Human physiology
  • Space medicine
  • Neuroscience

Background:

  • Space flight poses challenges to human sensory systems.
  • Vestibular system adaptation to microgravity is crucial for orientation.
  • Previous studies established methods for assessing subjective verticality.

Purpose of the Study:

  • To investigate the effect of space flight on the perception of verticality.
  • To determine the time course of vestibular system recovery post-flight.
  • To explore potential mechanisms of sensory suppression during space missions.

Main Methods:

  • Two subjects underwent eccentric rotation protocols before and after space flight.
  • Subjects set a luminous line to their perceived vertical.
  • The relationship between subjective vertical and the gravitoinertial vector was analyzed.

Main Results:

  • Subjective vertical perception was largely unrelated to the gravitoinertial vector before and immediately after space flight.
  • A clear relationship re-established in one subject 3 days post-flight and normalized by 5 days.
  • One subject showed continued disregard for vestibular information several days after flight.

Conclusions:

  • Space flight may induce suppression of vestibular information, potentially due to pre-flight deconditioning.
  • Individual differences exist in the recovery of vestibular-gravitational orientation post-flight.
  • The findings suggest both adaptive and persistent effects of space flight on sensory perception.

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