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Visuo-tactile integration and body ownership during self-generated action.
G Rognini1, A Sengül, J E Aspell
1Center for Neuroprosthetics, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.
The European Journal of Neuroscience
|January 29, 2013
Summary
Self-generated hand movements alter how the brain integrates visual and tactile information. Dynamic movements reduce visuo-tactile integration compared to static conditions, impacting body ownership and agency.
Area of Science:
- Neuroscience
- Sensory Integration
- Human Movement Science
Background:
- Understanding of visuo-tactile integration is growing, but its modulation by self-generated hand movements remains unclear.
- Multisensory integration is crucial for dynamic sensorimotor processes, including hand movements.
Purpose of the Study:
- To investigate how self-generated bimanual hand movements affect visuo-tactile integration.
- To quantify cross-modal congruency effects (CCEs) during dynamic movement conditions.
Main Methods:
- Utilized a robotic platform to measure CCEs during various bimanual hand movement conditions.
- Introduced temporal visuo-motor delays to assess effects on integration, body ownership, and agency.
Main Results:
- Classical CCEs were observed during self-generated hand movements, though their magnitude was reduced compared to static conditions.
- Visuo-tactile integration, body ownership, and sense of agency decreased with temporal visuo-motor delays.
- Visual stimuli interfered less with tactile perception during movement than when static, particularly when predictive motor information was absent.
Conclusions:
- Self-generated hand movements dynamically modulate visuo-tactile integration.
- Current models of visuo-tactile integration require updates to incorporate dynamic sensorimotor contexts and predictive coding.
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