title: Space flight: IV. Variables of motion sickness.
abstract: Two variables of motion sickness are discussed. Gas chromatography mass spectrometry data are presented.
mesh_terms: D005745:Gastric Acidity Determination; D006801:Humans; D009041:Motion Sickness / Q000503:physiopathology*; D009949:Orientation / Q000502:physiology; D011453:Prostaglandins / Q000502:physiology*; D013026:Space Flight; D014893:Weightlessness
chemical_list: D011453:Prostaglandins