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- W3093313253 endingPage "e1008373" @default.
- W3093313253 startingPage "e1008373" @default.
- W3093313253 abstract "The timescales of adaptation to novel dynamics are well explained by a dual-rate model with slow and fast states. This model can predict interference, savings and spontaneous recovery, but cannot account for adaptation to multiple tasks, as each new task drives unlearning of the previously learned task. Nevertheless, in the presence of appropriate contextual cues, humans are able to adapt simultaneously to opposing dynamics. Consequently this model was expanded, suggesting that dual-adaptation occurs through a single fast process and multiple slow processes. However, such a model does not predict spontaneous recovery within dual-adaptation. Here we assess the existence of multiple fast processes by examining the presence of spontaneous recovery in two experimental variations of an adaptation-de-adaptation-error-clamp paradigm within dual-task adaptation in humans. In both experiments, evidence for spontaneous recovery towards the initially learned dynamics (A) was found in the error-clamp phase, invalidating the one-fast-two-slow dual-rate model. However, as adaptation is not only constrained to two timescales, we fit twelve multi-rate models to the experimental data. BIC model comparison again supported the existence of two fast processes, but extended the timescales to include a third rate: the ultraslow process. Even within our single day experiment, we found little evidence for decay of the learned memory over several hundred error-clamp trials. Overall, we show that dual-adaptation can be best explained by a two-fast-triple-rate model over the timescales of adaptation studied here. Longer term learning may require even slower timescales, explaining why we never forget how to ride a bicycle." @default.
- W3093313253 created "2020-10-22" @default.
- W3093313253 creator A5016939493 @default.
- W3093313253 creator A5032515516 @default.
- W3093313253 date "2020-10-19" @default.
- W3093313253 modified "2023-10-14" @default.
- W3093313253 title "Timescales of motor memory formation in dual-adaptation" @default.
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- W3093313253 doi "https://doi.org/10.1371/journal.pcbi.1008373" @default.
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- W3093313253 hasPublicationYear "2020" @default.
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