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Orientation illusions in spaceflight

L N Kornilova1

  • 1Institute of Biomedical Problems, Moscow, Russia.

Journal of Vestibular Research : Equilibrium & Orientation
|December 16, 1997
PubMed
Summary
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Nearly all astronauts experience spatial orientation illusions during spaceflight adaptation. These sensory system responses to microgravity vary individually but are common, impacting perception even without other symptoms.

Area of Science:

  • Space Medicine
  • Human Physiology
  • Neuroscience

Background:

  • Spaceflight presents unique challenges to human sensory systems.
  • Adaptation to microgravity involves complex physiological and perceptual adjustments.
  • Illusory reactions are a documented phenomenon in astronauts.

Purpose of the Study:

  • To investigate spontaneous illusory reactions in cosmonauts during spaceflight.
  • To analyze the nature and prevalence of spatial orientation illusions.
  • To understand the sensory system's response to microgravity and adaptation.

Main Methods:

  • Utilized ANKETA questionnaires for data collection from 104 cosmonauts.
  • Supplemented questionnaire data with verbal descriptions recorded via dictaphone by 24 cosmonauts.
Keywords:
Non-programmatic

Related Experiment Videos

  • Analyzed data to identify patterns in orientation illusions during and after spaceflight.

    • Main Results:

    • 98% of cosmonauts reported orientation illusions (position, self-motion, surround-motion) during weightlessness adaptation.
    • Spatial orientation illusions are a general sensory response to microgravity, not limited to specific individuals.
    • Illusion characteristics (severity, nature, timing) varied among cosmonauts, with some persisting after 50 days.

    Conclusions:

    • Spatial orientation illusions are a common, albeit individually variable, response to microgravity.
    • The sensory system's adaptation to weightlessness can be an undulating process involving alternating adaptation and de-adaptation.
    • A classification of weightlessness illusions was proposed based on the study's findings.