Rapid hippocampal plasticity supports motor sequence learning
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Citações na Scopus
33
Tipo de produção
article
Data de publicação
2020
Título da Revista
ISSN da Revista
Título do Volume
Editora
NATL ACAD SCIENCES
Autores
JACOBACCI, Florencia
ARMONY, Jorge L.
YEFFAL, Abraham
LERNER, Gonzalo
JOVICICH, Jorge
DOYON, Julien
DELLA-MAGGIORE, Valeria
Citação
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, v.117, n.38, p.23898-23903, 2020
Resumo
Recent evidence suggests that gains in performance observed while humans learn a novel motor sequence occur during the quiet rest periods interleaved with practice (micro-offline gains, MOGs). This phenomenon is reminiscent of memory replay observed in the hippocampus during spatial learning in rodents. Whether the hippocampus is also involved in the production of MOGs remains currently unknown. Using a multimodal approach in humans, here we show that activity in the hippocampus and the precuneus increases during the quiet rest periods and predicts the level of MOGs before asymptotic performance is achieved. These functional changes were followed by rapid alterations in brain microstructure in the order of minutes, suggesting that the same network that reactivates during the quiet periods of training undergoes structural plasticity. Our work points to the involvement of the hippocampal system in the reactivation of procedural memories.
Palavras-chave
hippocampus, structural plasticity, functional MRI, reactivation, motor sequence learning
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