Challenging balance during sensorimotor adaptation increases generalization.

Journal of Neurophysiology
Amanda BakkumDaniel S Marigold

Abstract

From reaching to walking, real-life experience suggests that people can generalize between motor behaviors. One possible explanation for this generalization is that real-life behaviors often challenge our balance. We propose that the exacerbated body motions associated with balance-challenged whole body movements increase the value to the nervous system of using a comprehensive internal model to control the task. Because it is less customized to a specific task, a more comprehensive model is also a more generalizable model. Here we tested the hypothesis that challenging balance during adaptation would increase generalization of a newly learned internal model. We encouraged participants to learn a new internal model using prism lenses that created a new visuomotor mapping. Four groups of participants adapted to prisms while performing either a standing-based reaching or precision walking task, with or without a manipulation that challenged balance. To assess generalization after the adaptation phase, participants performed a single trial of each of the other groups' tasks without prisms. We found that both the reaching and walking balance-challenged groups showed significantly greater generalization to the equivalent, nonadapted...Continue Reading

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Citations

Nov 6, 2020·Neuroscience and Biobehavioral Reviews·Richard Boyle
Mar 22, 2021·BMC Sports Science, Medicine and Rehabilitation·Raouf HammamiUrs Granacher
May 15, 2021·Frontiers in Systems Neuroscience·Timothy R MacaulayJacob J Bloomberg
May 27, 2021·Journal of Neurophysiology·Amanda BakkumDaniel S Marigold

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