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• W2949063506 abstract "Abstract Movement planning consists of choosing the endpoint of the movement and selecting the motor program that will bring the effector on the endpoint. It is widely accepted that movement endpoint is updated on a trial-by-trial basis with respect to the observed errors and that the motor program for a given movement follows the rules of optimal feedback control. Here, we show clear limitations of these predictions because of the existence of a switching cost for motor planning. First, this cost prevented participants from tuning their motor program appropriately for each individual trial. This was true even when the participants selected the width of the target that they reached toward or when they had learned the appropriate motor program previously. These data are compatible with the existence of a switching cost such as those found in cognitive studies. Interestingly, this cost of switching shares many features of costs reported in cognitive task switching experiments and, when tested in the same participants, was correlated with it. Second, we found that randomly changing the width of a target over the course of a reaching experiment prevents the motor system from updating the endpoint of movements on the basis of the performance on the previous trial if the width of the target has changed. These results provide new insights into the process of motor planning and how it relates to optimal control theory and to a selection by consequences process rather than to an error-based process for action selection." @default.
• W2949063506 created "2019-06-27" @default.
• W2949063506 creator A5075471566 @default.
• W2949063506 creator A5090664889 @default.
• W2949063506 date "2016-04-13" @default.
• W2949063506 modified "2023-10-14" @default.
• W2949063506 title "A switching cost for motor planning" @default.
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• W2949063506 doi "https://doi.org/10.1101/047621" @default.
• W2949063506 hasPublicationYear "2016" @default.
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