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Development of a Novel Task-oriented Rehabilitation Program using a Bimanual Exoskeleton Robotic Hand
Published on: May 20, 2020
Resource-demanding versus cost-effective bimanual interaction in the brain
Yu Aramaki1, Rieko Osu, Norihiro Sadato
1Center for Fostering Young and Innovative Researchers, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi, 466-8555, Japan. aramaki@nitech.ac.jp
Experimental Brain Research
|April 27, 2010
Summary
Neural networks for bimanual movements show distinct patterns. Asymmetric movements engage the non-dominant hand motor network for stability, while symmetric movements conserve neural resources by sharing information between hands.
Area of Science:
- Neuroscience
- Motor Control
- Human Brain Imaging
Background:
- Bimanual movements can involve interference through neural pathways when hands require different information.
- This interference might be beneficial in symmetric movements, enabling shared information processing for both hands.
Purpose of the Study:
- To investigate neural interactions (supra-additive and sub-additive) during bimanual asymmetric and symmetric movements.
- To compare brain activity during bimanual tasks with the sum of unimanual movements.
Main Methods:
- Functional magnetic resonance imaging (fMRI) was used to observe brain activity.
- Activity during bimanual asymmetric and symmetric movements was contrasted with summed unimanual (right and left finger-tapping) activity.
Main Results:
- Supra-additive activation during asymmetric movement continuation was observed in the right dorsal premotor cortex and left cerebellum (lobule V).
- These areas showed activation for left-hand unimanual movements, suggesting a role in stabilizing the non-dominant hand.
- Sub-additive activation was found in the supplementary motor area (SMA) and cerebellum (lobule VI) for symmetric movements, and SMA for asymmetric movements, indicating neural cost savings.
- Sub-additive activation in the left anterior putamen during initiation suggested lower motor programming demands for symmetric movements.
Conclusions:
- Neural substrates of bimanual movements adapt based on coordination patterns.
- Asymmetric movements may involve increased effort to stabilize the non-dominant hand.
- Symmetric movements appear to optimize neural cost by facilitating information sharing between hands.
