Early excitatory-inhibitory cortical modifications following skill learning are associated with motor memory consolidation and plasticity overnight

Tamir Eisenstein (), Edna Furman-Haran and Assaf Tal ()
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Tamir Eisenstein: Weizmann Institute of Science
Edna Furman-Haran: Weizmann Institute of Science
Assaf Tal: Weizmann Institute of Science

Nature Communications, 2024, vol. 15, issue 1, 1-17

Abstract: Abstract Consolidation of motor memories is vital to offline enhancement of new motor skills and involves short and longer-term offline processes following learning. While emerging evidence link glutamate and GABA dynamics in the primary motor cortex (M1) to online motor skill practice, its relationship with offline consolidation processes in humans is unclear. Using two-day repeated measures of behavioral and multimodal neuroimaging data before and following motor sequence learning, we show that short-term glutamatergic and GABAergic responses in M1 within minutes after learning were associated with longer-term learning-induced functional, structural, and behavioral modifications overnight. Furthermore, Glutamatergic and GABAergic modifications were differentially associated with different facets of motor memory consolidation. Our results point to unique and distinct roles of Glutamate and GABA in motor memory consolidation processes in the human brain across timescales and mechanistic levels, tying short-term changes on the neurochemical level to overnight changes in macroscale structure, function, and behavior.

Date: 2024
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DOI: 10.1038/s41467-024-44979-9

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