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Effects of immersion in virtual reality on postural control
Hironori Akizuki1, Atsuhiko Uno, Kouichi Arai
1Department of Otolaryngology, University of Tokushima School of Medicine, 3-18-15 Kuramoto, Tokushima 770-0042, Japan.
Neuroscience Letters
|April 9, 2005
Summary
Virtual reality (VR) immersion with visual-vestibular conflict slightly increases motion sickness but decreases reliance on visual input for balance. This suggests VR may help retrain balance control in vestibular disorders.
Area of Science:
- Neuroscience
- Human Physiology
- Virtual Reality Technology
Background:
- Virtual Reality (VR) systems introduce visual-vestibular conflicts due to inherent and added time lags.
- Understanding the impact of these conflicts on human balance and motion sickness is crucial for VR application development.
Purpose of the Study:
- To investigate the effects of time lag in VR on motion sickness and postural control.
- To determine if VR immersion alters visual dependency in maintaining balance.
Main Methods:
- Healthy volunteers were immersed in VR with induced time lags (0-0.8 s) beyond the inherent delay (~250 ms).
- Postural control was assessed by measuring body sway path with eyes open and closed.
- Romberg ratio (sway with eyes closed / sway with eyes open) was calculated before and after VR immersion.
Main Results:
- VR immersion induced mild motion sickness but did not significantly alter body sway paths.
- The Romberg ratio significantly decreased after VR immersion, indicating reduced visual dependency.
- This suggests adaptation to visual-vestibular conflict in VR.
Conclusions:
- VR immersion decreases reliance on visual input for postural control by promoting adaptation to visual-vestibular conflicts.
- This adaptation involves increased contribution from vestibular and somatosensory systems.
- VR shows potential for treating visual vertigo by facilitating sensory reweighting for balance control.