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Encoding and consolidation of motor sequence learning in young and older adults.
Fitzroy, Ahren B; Kainec, Kyle A; Seo, Jeehye; Spencer, Rebecca M C.
Afiliação
  • Fitzroy AB; Neuroscience & Behavior Program, University of Massachusetts Amherst, United States; Department of Psychological & Brain Sciences, University of Massachusetts Amherst, United States. Electronic address: ahren.fitzroy@gmail.com.
  • Kainec KA; Neuroscience & Behavior Program, University of Massachusetts Amherst, United States; Department of Psychological & Brain Sciences, University of Massachusetts Amherst, United States. Electronic address: kkainec@umass.edu.
  • Seo J; Neuroscience & Behavior Program, University of Massachusetts Amherst, United States; Department of Psychological & Brain Sciences, University of Massachusetts Amherst, United States. Electronic address: amoir710@gmail.com.
  • Spencer RMC; Neuroscience & Behavior Program, University of Massachusetts Amherst, United States; Department of Psychological & Brain Sciences, University of Massachusetts Amherst, United States; Institute for Applied Life Sciences, University of Massachusetts Amherst, United States. Electronic address:
Neurobiol Learn Mem ; 185: 107508, 2021 11.
Article em En | MEDLINE | ID: mdl-34450244
Sleep benefits motor memory consolidation in young adults, but this benefit is reduced in older adults. Here we sought to understand whether differences in the neural bases of encoding between young and older adults contribute to aging-related differences in sleep-dependent consolidation of an explicit variant of the serial reaction time task (SRTT). Seventeen young and 18 older adults completed two sessions (nap, wake) one week apart. In the MRI, participants learned the SRTT. Following an afternoon interval either awake or with a nap (recorded with high-density polysomnography), performance on the SRTT was reassessed in the MRI. Imaging and behavioral results from SRTT performance showed clear sleep-dependent consolidation of motor sequence learning in older adults after a daytime nap, compared to an equal interval awake. Young adults, however, showed brain activity and behavior during encoding consistent with high SRTT performance prior to the sleep interval, and did not show further sleep-dependent performance improvements. Young adults did show reduced cortical activity following sleep, suggesting potential systems-level consolidation related to automatization. Sleep physiology data showed that sigma activity topography was affected by hippocampal and cortical activation prior to the nap in both age groups, and suggested a role of theta activity in sleep-dependent automatization in young adults. These results suggest that previously observed aging-related sleep-dependent consolidation deficits may be driven by aging-related deficiencies in fast learning processes. Here we demonstrate that when sufficient encoding strength is reached with additional training, older adults demonstrate intact sleep-dependent consolidation of motor sequence learning.
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Texto completo: 1 Bases de dados: MEDLINE Assunto principal: Sono / Consolidação da Memória / Destreza Motora Limite: Adolescent / Adult / Aged / Female / Humans / Male / Middle aged Idioma: En Revista: Neurobiol Learn Mem Assunto da revista: BIOLOGIA / CIENCIAS DO COMPORTAMENTO / NEUROLOGIA Ano de publicação: 2021 Tipo de documento: Article

Texto completo: 1 Bases de dados: MEDLINE Assunto principal: Sono / Consolidação da Memória / Destreza Motora Limite: Adolescent / Adult / Aged / Female / Humans / Male / Middle aged Idioma: En Revista: Neurobiol Learn Mem Assunto da revista: BIOLOGIA / CIENCIAS DO COMPORTAMENTO / NEUROLOGIA Ano de publicação: 2021 Tipo de documento: Article