[Effect of human body position and its holding on the level of manifestation of spatial illusions in weightlessness]

Abstract

Test subjects were exposed to short-term weightlessness in various positions: standing, seated, supine in the cosmonaut's chair and on the flat surface, with the head kept straight ahead, bent forward or backward. Their susceptibility to illusionary sensations was measured. It was found that the development of spatial illusions in the weightless state was not correlated with body position, head position relative to the torso or restraint type.