Despite rich behavioral evidence, it is unclear how the brain expands its behavior repertoire. By building theoretical models with a deep reinforcement learning algorithm, I show that the brain composes a behavior to solve a novel task by combining previously acquired skills and augmenting their variability.
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This is a summary of: Makino, H. Arithmetic value representation for hierarchical behavior composition. Nat. Neurosci. https://doi.org/10.1038/s41593-022-01211-5 (2022).
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Deep reinforcement learning to study combinatorial expansion of a behavior repertoire. Nat Neurosci 26, 2–3 (2023). https://doi.org/10.1038/s41593-022-01235-x