title: Inversion illusion in the so-called zero-gravity conditions of parabolic flight.
mesh_terms: D000054:Acceleration; D006801:Humans; D007088:Illusions; D012665:Semicircular Canals / Q000502:physiology*; D013026:Space Flight; D013314:Stress, Mechanical; D014893:Weightlessness / Q000009:adverse effects*