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Vestibular and active self-motion signals drive visual perception in binocular rivalry
David Alais1, Robert Keys1, Frans A J Verstraten1
1School of Psychology, The University of Sydney, Sydney, NSW 2006, Australia.
Iscience
|December 8, 2021
Summary
The vestibular system, which governs balance, can resolve ambiguous visual motion. This study shows that both passive rotation and active self-rotation influence visual perception, demonstrating the brain integrates vestibular and motor signals for a stable view of the world.
Area of Science:
- Neuroscience
- Sensory Integration
- Vestibular System
Background:
- Multisensory integration is crucial for accurate world modeling.
- Vestibular influences on vision are less understood than those of sound or touch.
- Ambiguous visual stimuli can be used to probe sensory influences.
Purpose of the Study:
- To investigate the influence of the vestibular system on visual perception.
- To determine if vestibular signals can resolve visual motion ambiguity.
- To compare passive and active self-motion effects on vision.
Main Methods:
- Presenting horizontally opposed visual motions to each eye, creating unstable perception.
- Subjecting participants to passive, whole-body yaw plane rotations.
- Analyzing participant responses during active self-rotation with similar motion profiles.
Main Results:
- Passive whole-body rotations stabilized irregular visual alternations, with perceived direction matching rotation direction.
- Active self-rotation more strongly and rapidly entrained vision to the rotation cycle.
- Vestibular input was shown to resolve visual motion ambiguity and determine perception.
Conclusions:
- Vestibular signals play a significant role in resolving visual ambiguity.
- Both passive and active self-motion effectively shape visual perception.
- Visual ambiguity paradigms effectively reveal vestibular and motor contributions to visual perception.
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