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Simulation of Space-Adaptation Syndrome on Earth
W J Ockels1, R Furrer, E Messerschmid
1European Space Agency, ESTEC, Noordwijk, The Netherlands.
ESA Journal
|January 1, 1989
Summary
Astronauts experienced significant vestibular-visual changes after 3g centrifuge exposure, mirroring space adaptation syndrome. Full readaptation to Earth
Area of Science:
- Human Physiology
- Space Medicine
- Vestibular Neuroscience
Background:
- Astronauts returning from space often experience disorientation and balance issues.
- The effects of simulated gravity on human physiology are crucial for understanding space adaptation.
Purpose of the Study:
- To evaluate astronaut readaptation to normal gravity after simulated high-g exposure.
- To compare post-centrifuge responses with known Space Adaptation Syndrome (SAS) symptoms.
Main Methods:
- Three Spacelab D-1 astronauts underwent a 1.5-hour centrifuge run at 3g in a supine position.
- Subjective astronaut experiences were recorded and compared to spaceflight data.
- Objective vestibular and visual system tests were performed post-exposure.
Main Results:
- A specific and reproducible modification of the vestibular-visual system was observed after centrifuge runs.
- Readaptation to 1g environment required at least 6 hours.
- Subjective astronaut reports showed striking similarities to adaptation to weightlessness.
Conclusions:
- Simulated 3g exposure induces physiological responses similar to those experienced during spaceflight adaptation.
- The vestibular-visual system's adaptation and readaptation processes are key areas for future space medicine research.
- Understanding these responses aids in developing countermeasures for astronaut health during long-duration missions.