Unstable coupling of body sway with imposed motion precedes visually induced motion sickness |
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| Affiliation: | 1. Department of Rehabilitation Sciences, Faculty of Health Sciences, Hokkaido University, Sapporo, Japan;2. Department of Physical Therapy, School of Rehabilitation, Tokyo Kasei University, Sayama, Japan;1. Department of Athletic Performance, National Taiwan Normal University, 88, Ting-Zhou Road Section 4, Taipei 116, Taiwan;2. Department of Physical Education, Fu Jen Catholic University, 510, Zong-Zeng Road, XinZhuang Dist, New Taipei City 24205, Taiwan;3. Department of Kinesiology, 337 Ramsey, University of Georgia, Athens, GA 30602, USA;1. Department of Physical Therapy, Movement and Rehabilitation Sciences, Bouvé College of Health Sciences, Northeastern University, United States;2. School of Physical Therapy and Athletic Training, College of Health Professions, Pacific University, United States;3. Department of Occupational Science & Technology, College of Health Sciences, University of Wisconsin Milwaukee, United States;4. Harvard Medical School, Broad Institute of MIT and Harvard, Brigham Women Hospital, United States;5. TAVANA LLC, United States;1. Applied Health Sciences Doctoral Program, University of Manitoba, Winnipeg, Canada;2. College of Applied Medical Sciences, Qassim University, Saudi Arabia;3. Faculty of Kinesiology and Recreation Management, University of Manitoba, Winnipeg, Canada;4. Health, Leisure, and Human Performance Research Institute, University of Manitoba, Winnipeg, Canada;5. Department of Community Health Sciences, University of Manitoba, Winnipeg, Canada;6. Centre for Healthcare Innovation, University of Manitoba, Canada;1. Affordance Perception-Action Laboratory, School of Kinesiology, University of Minnesota, USA;2. Department of Psychology, Illinois State University, USA |
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| Abstract: | Motion sickness is preceded by differences in the quantitative kinematics of body sway between individuals who (later) become sick and those who do not. In existing research, this effect has been demonstrated only in measures of body sway, relative to the earth. However, body sway can become coupled with imposed oscillatory motion of the illuminated environment, and the nature of this coupling may differ between individuals who become sick and those who do not. We asked whether body sway would become coupled to complex oscillations of the illuminated environment, and whether individual differences in such coupling might be precursors of motion sickness. Standing participants (women) were exposed to complex oscillation of the illuminated environment. We examined the strength of coupling as a function of time during exposure. Following exposure, some participants reported motion sickness. The nature and temporal evolution of coupling differed between participants who later reported motion sickness and those who did not. Our results show that people can couple the complex dynamics of body sway with complex imposed motion, and that differences in the nature of this coupling are related to the risk of motion sickness. |
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| Keywords: | Posture Coordination Perception-action Motion sickness |
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