Sleep spindles and slow waves are physiological markers for age-related changes in gray matter in brain regions supporting problem-solving skills.
Journal
Learning & memory (Cold Spring Harbor, N.Y.)
ISSN: 1549-5485
Titre abrégé: Learn Mem
Pays: United States
ID NLM: 9435678
Informations de publication
Date de publication:
01 2023
01 2023
Historique:
received:
12
09
2022
accepted:
29
11
2022
pmc-release:
01
01
2024
entrez:
23
12
2022
pubmed:
24
12
2022
medline:
28
12
2022
Statut:
epublish
Résumé
As we age, the added benefit of sleep for memory consolidation is lost. One of the hallmark age-related changes in sleep is the reduction of sleep spindles and slow waves. Gray matter neurodegeneration is related to both age-related changes in sleep and age-related changes in memory, including memory for problem-solving skills. Here, we investigated whether spindles and slow waves might serve as biological markers for neurodegeneration of gray matter and for the related memory consolidation deficits in older adults. Forty healthy young adults (20-35 yr) and 30 healthy older adults (60-85 yr) were assigned to either nap or wake conditions. Participants were trained on the Tower of Hanoi in the morning, followed by either a 90-min nap opportunity or period of wakefulness, and were retested afterward. We found that age-related changes in sleep spindles and slow waves were differentially related to gray matter intensity in young and older adults in brain regions that support sleep-dependent memory consolidation for problem-solving skills. Specifically, we found that spindles were related to gray matter in neocortical areas (e.g., somatosensory and parietal cortex), and slow waves were related to gray matter in the anterior cingulate, hippocampus, and caudate, all areas known to support problem-solving skills. These results suggest that both sleep spindles and slow waves may serve as biological markers of age-related neurodegeneration of gray matter and the associated reduced benefit of sleep for memory consolidation in older adults.
Identifiants
pubmed: 36564151
pii: 30/1/12
doi: 10.1101/lm.053649.122
pmc: PMC9872192
doi:
Substances chimiques
Biomarkers
0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
12-24Informations de copyright
© 2023 Toor et al.; Published by Cold Spring Harbor Laboratory Press.
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