Learning of new associations invokes a major change in modulations of cortical beta oscillations in human adults

Pavlova, A.; Tyulenev, N.; Tretyakova, V.; Skavronskaya, V.; Nikolaeva, A.; Prokofyev, A.; Stroganova, T.; Chernyshev, B.

Авторы: Pavlova A., Tyulenev N., Tretyakova V., Skavronskaya V., Nikolaeva A., Prokofyev A., Stroganova T., Chernyshev B.
Журнал: Psychophysiology
Год издания: 2023
Издательство: Blackwell Publishing Inc.
Местоположение издательства: United Kingdom
Номер статьи: 14284
DOI: 10.1111/psyp.14284
Аннотация: Large-scale cortical beta (β) oscillations were implicated in the learning processes, but their exact role is debated. We used MEG to explore the dynamics of movement-related β-oscillations while 22 adults learned, through trial and error, novel associations between four auditory pseudowords and movements of four limbs. As learning proceeded, spatial–temporal characteristics of β-oscillations accompanying cue-triggered movements underwent a major transition. Early in learning, widespread suppression of β-power occurred long before movement initiation and sustained throughout the whole behavioral trial. When learning advanced and performance reached asymptote, β-suppression after the initiation of correct motor response was replaced by a rise in β-power mainly in the prefrontal and medial temporal regions of the left hemisphere. This post-decision β-power predicted trial-by-trial response times (RT) at both stages of learning (before and after the rules become familiar), but with different signs of interaction. When a subject just started to acquire associative rules and gradually improved task performance, a decrease in RT correlated with the increase in the post-decision β-band power. When the participants implemented the already acquired rules, faster (more confident) responses were associated with the weaker post-decision β-band synchronization. Our findings suggest that maximal beta activity is pertinent to a distinct stage of learning and may serve to strengthen the newly learned association in a distributed memory network.
Добавил в систему: Чернышев Борис Владимирович

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Learning of new associations invokes a major change in modulations of cortical beta oscillations in human adultsстатья

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