Insufficient chunk concatenation may underlie changes in sleep-dependent consolidation of motor sequence learning in older adults

Sleep enhances motor sequence learning (MSL) in young adults by concatenating subsequences (“chunks”) formed during skill acquisition. To examine whether this process is reduced in aging, we assessed performance changes on the MSL task following overnight sleep or daytime wake in healthy young and o...

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Detalles Bibliográficos
Autores principales: Bottary, Ryan, Sonni, Akshata, Wright, David, Spencer, Rebecca M. C.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Cold Spring Harbor Laboratory Press 2016
Materias:
Brief Communication
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4986853/
https://www.ncbi.nlm.nih.gov/pubmed/27531835
http://dx.doi.org/10.1101/lm.043042.116
Descripción
Sumario:Sleep enhances motor sequence learning (MSL) in young adults by concatenating subsequences (“chunks”) formed during skill acquisition. To examine whether this process is reduced in aging, we assessed performance changes on the MSL task following overnight sleep or daytime wake in healthy young and older adults. Young adult performance enhancement was correlated with nREM2 sleep, and facilitated by preferential improvement of slowest within-sequence transitions. This effect was markedly reduced in older adults, and accompanied by diminished sigma power density (12–15 Hz) during nREM2 sleep, suggesting that diminished chunk concatenation following sleep may underlie reduced consolidation of MSL in older adults.

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