Interplay of tactile and motor information in constructing spatial self-perception

During active movement, there is normally a tight relation between motor command and sensory representation about the resulting spatial displacement of the body. Indeed, some theories of space perception emphasize the topographic layout of sensory receptor surfaces, while others emphasize implicit s...

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Veröffentlicht in:Current biology 2022-03, Vol.32 (6), p.1301-1309.e3
Hauptverfasser: Cataldo, Antonio, Dupin, Lucile, Dempsey-Jones, Harriet, Gomi, Hiroaki, Haggard, Patrick
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container_end_page 1309.e3
container_issue 6
container_start_page 1301
container_title Current biology
container_volume 32
creator Cataldo, Antonio
Dupin, Lucile
Dempsey-Jones, Harriet
Gomi, Hiroaki
Haggard, Patrick
description During active movement, there is normally a tight relation between motor command and sensory representation about the resulting spatial displacement of the body. Indeed, some theories of space perception emphasize the topographic layout of sensory receptor surfaces, while others emphasize implicit spatial information provided by the intensity of motor command signals. To identify which has the primary role in spatial perception, we developed experiments based on everyday self-touch, in which the right hand strokes the left arm. We used a robot-mediated form of self-touch to decouple the spatial extent of active or passive right hand movements from their tactile consequences. Participants made active movements of the right hand between unpredictable, haptically defined start and stop positions, or the hand was passively moved between the same positions. These movements caused a stroking tactile motion by a brush along the left forearm, with minimal delay, but with an unpredictable spatial gain factor. Participants judged the spatial extent of either the right hand’s movement, or of the resulting tactile stimulation to their left forearm. Across five experiments, we found that movement extent strongly interfered with tactile extent perception, and vice versa. Crucially, interference in both directions was stronger during active than passive movements. Thus, voluntary motor commands produced stronger integration of multiple sensorimotor signals underpinning the perception of personal space. Our results prompt a reappraisal of classical theories that reduce space perception to motor command information. •We used two coupled robots to manipulate spatial perceptions during self-touch•We found strong interference of movement on tactile spatial percepts and vice versa•This bidirectional interference was greater for active than for passive movements•Active self-touch plays a key role in spatial coherence of bodily self-awareness Tactile and motor signals are tightly linked in self-touch behaviors, making their separate contributions to perception hard to identify. Cataldo et al. use two linked robots to decouple motor from sensory components. Their results show that voluntary motor commands bind spatial information from movement and touch into a coherent spatial percept.
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source MEDLINE; Cell Press Free Archives; Access via ScienceDirect (Elsevier); EZB-FREE-00999 freely available EZB journals
subjects agency
Hand - physiology
Humans
Life Sciences
motor dominance
Movement - physiology
Neurons and Cognition
optimal integration
Self Concept
self-generated touch
self-touch
sensorimotor interaction
Space Perception
spatial perception
tool-mediated self-touch
Touch - physiology
Touch Perception - physiology
touchant-touché
voluntary action
title Interplay of tactile and motor information in constructing spatial self-perception
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