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Awareness of Visual Offset Reduces but Does Not Eliminate Joint Repositioning Errors in Virtual Reality
Motoki Sakurai1, Kate A Spitzley1,2, Andrew R Karduna1
1Department of Human Physiology, University of Oregon, Eugene, Oregon, USA.
Journal of Motor Behavior
|July 17, 2024
Summary
Participants can reduce visual errors in joint repositioning tasks by consciously ignoring visual input. However, completely eliminating vision
Area of Science:
- Neuroscience
- Human Movement Science
- Virtual Reality
Background:
- Proprioception is crucial for accurate joint positioning.
- Visuo-proprioceptive mismatch can disrupt joint position sense.
Purpose of the Study:
- To investigate the impact of visual offset on shoulder joint repositioning accuracy.
- To determine if conscious effort to ignore vision can mitigate the effects of visuo-proprioceptive mismatch.
Main Methods:
- Twenty-five healthy young adults performed a shoulder joint position sense test in a 3D virtual reality environment.
- Visual conditions included accurate vision and an 8° visual offset (up or down).
- Participants were instructed to either ignore vision or receive no guidance.
Main Results:
- Repositioning error was significantly lower in the offset vision condition when participants were instructed to ignore vision (p < 0.001).
- Despite instructions to ignore vision, repositioning error in the offset condition remained higher than in the accurate vision condition (p < 0.001).
Conclusions:
- Conscious effort can help down-weight the influence of vision in joint repositioning tasks.
- Vision's influence is difficult to completely eliminate, even with instructions to ignore it.
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