title: Cinerama sickness and postural instability.
abstract: Motion sickness symptoms and increased postural instability induced by motion pictures have been reported in a laboratory, but not in a real cinema. We, therefore, carried out an observational study recording sickness severity and postural instability in 19 subjects before, immediately and 45 min after watching a 1 h 3D aviation documentary in a cinema. Sickness was significantly larger right after the movie than before, and in a lesser extent still so after 45 min. The average standard deviation of the lateral centre of pressure excursions was significantly larger only right afterwards. When low-pass filtered at 0.1 Hz, lateral and for-aft excursions were both significantly larger right after the movie, while for-aft excursions then remained larger even after 45 min. Speculating on previous findings, we predict more sickness and postural instability in 3D than in 2D movies, also suggesting a possible, but yet unknown risk for work-related activities and vehicle operation.
  Watching motion pictures may be sickening and posturally destabilising, but effects in a cinema are unknown. We, therefore, carried out an observational study showing that sickness then is mainly an issue during the exposure while postural instability is an issue afterwards.
authors.affiliation: a TNO Perceptual and Cognitive Systems , P.O. Box 23 , 3769 ZG , Soesterberg , the Netherlands.
authors.forename: Jelte E
authors.initials: JE
authors.lastname: Bos
authors.forename: Wietse D
authors.initials: WD
authors.lastname: Ledegang
authors.forename: Astrid J A
authors.initials: AJ
authors.lastname: Lubeck
authors.forename: John F
authors.initials: JF
authors.lastname: Stins
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009040:Motion Pictures; D009041:Motion Sickness / Q000209:etiology* / Q000503:physiopathology; D004856:Postural Balance; D013997:Time Factors; D055815:Young Adult