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Directional interference during bimanual coordination: is interlimb coupling mediated by afferent or efferent
Stephan P Swinnen1, Veerle Puttemans, Sophie Vangheluwe
1Motor Control Laboratory, Department of Kinesiology, Group Biomedical Sciences, K.U. Leuven, Tervuurse Vest 101, Heverlee, 3001, Leuven, Belgium. stephan.swinnen@flok.kukeuven.ac.be
Behavioural Brain Research
|March 19, 2003
Summary
Bimanual movement causes directional interference between limbs. Manipulating sensory information did not alter this interference, suggesting it originates from motor planning, not sensory feedback.
Area of Science:
- Motor control
- Neuroscience
- Human movement science
Background:
- Bimanual movements require coordination between limbs.
- Directional interference occurs when movements of one limb affect the other.
- The role of sensory information in this interference is not fully understood.
Purpose of the Study:
- To investigate the influence of afferent information on bimanual directional interference.
- To determine if sensory manipulation modulates interference between limbs.
Main Methods:
- Experiment 1: Modulated visual feedback (present, withdrawn, transformed).
- Experiment 2: Used muscle tendon vibration to alter kinesthetic afferent information.
- Measured directional interference between left and right limb movements.
Main Results:
- Confirmed significant directional interference between limbs.
- No modulation of interference was observed when visual or kinesthetic afferent information was manipulated.
- Interference from the right to the left limb was consistent across sensory conditions.
Conclusions:
- Directional interference in bimanual tasks is robust.
- Sensory afferent information does not appear to modulate this interference.
- Interference likely arises from efferent processes in motor planning and organization.