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Contextual inference underlies the learning of sensorimotor repertoires
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Journal Article
Contextual inference underlies the learning of sensorimotor repertoires
2021
Overview
Asbtract
Humans spend a lifetime learning, storing and refining a repertoire of motor memories. For example, through experience, we become proficient at manipulating a large range of objects with distinct dynamical properties. However, it is unknown what principle underlies how our continuous stream of sensorimotor experience is segmented into separate memories and how we adapt and use this growing repertoire. Here we develop a theory of motor learning based on the key principle that memory creation, updating and expression are all controlled by a single computation—contextual inference. Our theory reveals that adaptation can arise both by creating and updating memories (proper learning) and by changing how existing memories are differentially expressed (apparent learning). This insight enables us to account for key features of motor learning that had no unified explanation: spontaneous recovery
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, savings
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, anterograde interference
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, how environmental consistency affects learning rate
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,
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and the distinction between explicit and implicit learning
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. Critically, our theory also predicts new phenomena—evoked recovery and context-dependent single-trial learning—which we confirm experimentally. These results suggest that contextual inference, rather than classical single-context mechanisms
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,
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,
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–
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, is the key principle underlying how a diverse set of experiences is reflected in our motor behaviour.
A theory of motor learning based on the principle of contextual inference reveals that adaptation can arise by both creating and updating memories and changing how existing memories are differentially expressed, and predicts evoked recovery and context-dependent single-trial learning.
Publisher
Nature Publishing Group UK,Nature Publishing Group
Subject
