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Changing motor perception by sensorimotor conflicts and body ownership
R Salomon1,2, N B Fernandez2, M van Elk3
1Center for Neuroprosthetics, École Polytechnique Fédérale de Lausanne, Switzerland.
Scientific Reports
|May 27, 2016
Summary
Sensorimotor conflicts, where actions and sensory feedback mismatch, impair motor perception. This study shows that incongruent visual feedback can make alien actions feel like one's own.
Area of Science:
- Cognitive Neuroscience
- Motor Control
- Perception
Background:
- Sensorimotor conflicts can disrupt the sense of agency.
- Current models focus on comparing predicted and observed sensory consequences.
- The impact of these conflicts on motor perception remains less understood.
Purpose of the Study:
- To investigate if sensorimotor conflicts affect motor perception beyond agency.
- To determine if visual feedback incongruence influences judgments of performed movements.
- To explore the role of virtual reality in manipulating sensorimotor congruence.
Main Methods:
- Participants performed finger movements with manipulated visual feedback (congruent/incongruent) using virtual reality.
- Judgments were made on motor perception (which finger moved) and visual perception (which finger was seen).
- Subjective measures of agency and body ownership were collected.
Main Results:
- Visual incongruence between performed and seen movements reduced motor perception accuracy.
- Visual perceptual judgments were unaffected by the sensorimotor conflict.
- The effect of incongruence on motor perception was modulated by virtual hand rotation but not passive movement.
Conclusions:
- Sensorimotor conflicts significantly modulate the perception of one's own motor actions.
- Incongruent visual feedback can lead to the misattribution of external actions as self-generated.
- This suggests a complex interplay between sensory prediction, motor execution, and perceptual judgment.
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