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Plos One : Substantial Generalization of Sensorimotor Learning from Bilateral to Unilateral Movement Conditions, Volume 8

By Gribble, Paul L.

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Book Id: WPLBN0003967242
Format Type: PDF eBook :
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Reproduction Date: 2015

Title: Plos One : Substantial Generalization of Sensorimotor Learning from Bilateral to Unilateral Movement Conditions, Volume 8  
Author: Gribble, Paul L.
Volume: Volume 8
Language: English
Subject: Journals, Science, Medical Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary)
Historic
Publication Date:
Publisher: Plos

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Gribble, P. L. (n.d.). Plos One : Substantial Generalization of Sensorimotor Learning from Bilateral to Unilateral Movement Conditions, Volume 8. Retrieved from http://kindle.worldlibrary.net/


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Description : Controversy exists regarding whether bimanual skill learning can generalize to unimanual performance. For example, some investigators showed that dynamic adaptation could only partially generalize between bilateral and unilateral movement conditions, while others demonstrated complete generalization of visuomotor adaptation. Here, we identified three potential factors that might have contributed to the discrepancy between the two sets of findings. In our first experiment, subjects performed reaching movements toward eight targets bilaterally with a novel force field applied to both arms, then unilaterally with the force field applied to one arm. Results showed that the dynamic adaptation generalized completely from bilateral to unilateral movements. In our second experiment, the same force field was only applied to one arm during both bilateral and unilateral movements. Results indicated complete transfer again. Finally, our subjects performed reaching movements toward a single target with the force field or a novel visuomotor rotation applied only to one arm during both bilateral and unilateral movements. The reduced breadth of experience obtained during bilateral movements resulted in incomplete transfer, which explains previous findings of limited generalization. These findings collectively suggest a substantial overlap between the neural processes underlying bilateral and unilateral movements, supporting the idea that bilateral training, often employed in stroke rehabilitation, is a valid method for improving unilateral performance. However, our findings also suggest that while the neural representations developed during bilateral training can generalize to facilitate unilateral performance, the extent of generalization may depend on the breadth of experience obtained during bilateral training.

 

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