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Cinerama sickness and postural instability

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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.

Practitioner Summary: 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.
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Keywords: balance; cinerama sickness; cybersickness; postural instability; visually induced motion sickness

Document Type: Research Article

Affiliations: 1: TNO Perceptual and Cognitive Systems, P.O. Box 23 3769 ZG, Soesterberg, the Netherlands 2: Faculty of Human Movement Sciences, Research Institute MOVE, VU University, Van der Boechorststraat 9 1081 BT, Amsterdam, the Netherlands

Publication date: September 1, 2013

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