Effect of microgravitation on the human equilibrium.

The 38-year period of human space exploration has gained for us a lot of experience in the problem of space motion sickness. The authors collected some causes of space sickness from the literature and from their research results. We collaborated with the Soviet-Russian space researchers and elaborated those vestibular research methods that were carried out by human space missions in the Soviet-Russian space station, on Earth, and after flight: spontaneous eye movement, foveal and peripheral optokinetic nystagmus, and vestibular stimulation. Using an earthly model of the effect of microgravitation on the human body, we tried to provide explanations of the origin of space motion sickness.