In zero gravity {weightlessness}|, people learn how to move themselves around using hands and arms, rather than legs. People learn to judge object mass using inertia, rather than weight. Body fluids shift to head. Bones lose calcium. Muscles atrophy. Blood changes composition.
motion sickness
Sensory conflict causes space motion sickness. Semicircular canals operate normally, but otoliths do not. Drugs can reduce motion-sickness symptoms.
effects
Returning astronaut feels heavy and clumsy. Head movements make world seem to move.
Social Sciences>Psychology>Behavior>Kinds
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Date Modified: 2022.0224