title: Spatial disorientation and the "break-off" phenomenon.
mesh_terms: D000328:Adult; D000337:Aerospace Medicine; D000531:Altitude; D001007:Anxiety; D001008:Anxiety Disorders; D006801:Humans; D007088:Illusions; D008297:Male; D008875:Middle Aged; D009039:Motion Perception; D010468:Perceptual Disorders; D010469:Perceptual Distortion; D013028:Space Perception; D014724:Vestibular Function Tests