Estimating the Sources of Motor Errors

author: Konrad Körding, Northwestern University
published: Jan. 19, 2010,   recorded: December 2009,   views: 171

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Description

Motor adaptation is usually defined as the process by which our nervous system produces accurate movements while the properties of our bodies and our environment continuously change. Many experimental and theoretical studies have characterized this process by assuming that the nervous system uses internal models to compensate for motor errors. Here we extend these approaches and construct a probabilistic model that not only compensates for motor errors but estimates the sources of these errors. These estimates dictate how the nervous system should generalize. For example, estimated changes of limb properties will affect movements across the workspace but not movements with the other limb. We extend previous studies in that area to account for temporal and context effects. This extended model explains aspects of savings along with aspects of generalization.

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