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Updated: Jul 3, 2026
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A Structured Rehabilitation Protocol for Improved Multifunctional Prosthetic Control: A Case Study
Published on: November 6, 2015
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Facilitated adaptation via structural learning increases bimanual interference.
Alexander T Brunfeldt1, Phillip C Desrochers1, Florian A Kagerer2,3
1Department of Kinesiology, Michigan State University, 308 W Circle Dr, East Lansing, MI, 48824, USA.
Experimental Brain Research
|November 18, 2023
Summary
Structural learning enhances bimanual interference, impacting motor control. This study found increased left-hand interference after right-hand adaptation, particularly in feedback control, suggesting sensory feedback upregulation.
Area of Science:
- Motor control and learning
- Human sensorimotor adaptation
- Bimanual coordination
Background:
- Bimanual coordination is crucial for motor function, but inter-limb interactions during independent control are not fully understood.
- Perturbing one limb can induce interference in the contralateral limb, offering insights into motor system interactions.
- Adaptation plays a key role in modulating bimanual interference, particularly through altered feedback regulation.
Purpose of the Study:
- To investigate the role of adaptation in bimanual interference using a structural learning paradigm.
- To determine how altering feedback regulation through structural training affects inter-limb interactions during reaching movements.
- To quantify feedforward and feedback measures of interference in a bimanual task following unilateral adaptation.
Main Methods:
- Healthy participants underwent training to adapt to 60 unique random visuomotor rotations in their right hand over 240 reaches.
- A bimanual reaching task was used to assess feedforward and feedback interference.
- The right hand experienced a fixed rotation, while the left hand reached without visual feedback.
Main Results:
- Participants exposed to structural training in the right hand exhibited increased left-hand interference in the initial 20 trials of the test task.
- Interference effects were more pronounced in feedback control parameters compared to feedforward control.
- The findings indicate that structural learning potentiates bimanual interference.
Conclusions:
- Structural learning significantly enhances bimanual interference, suggesting a mechanism for inter-limb interaction.
- The observed increase in interference, particularly in feedback control, points towards sensory feedback upregulation as a contributing factor.
- This study provides novel insights into how adaptation in one limb influences the motor control of the other.
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