The interaction between endogenous GABA, functional connectivity, and behavioral flexibility is critically altered with advanced age.
Journal
Communications biology
ISSN: 2399-3642
Titre abrégé: Commun Biol
Pays: England
ID NLM: 101719179
Informations de publication
Date de publication:
06 05 2022
06 05 2022
Historique:
received:
21
03
2021
accepted:
19
04
2022
entrez:
6
5
2022
pubmed:
7
5
2022
medline:
11
5
2022
Statut:
epublish
Résumé
The flexible adjustment of ongoing behavior challenges the nervous system's dynamic control mechanisms and has shown to be specifically susceptible to age-related decline. Previous work links endogenous gamma-aminobutyric acid (GABA) with behavioral efficiency across perceptual and cognitive domains, with potentially the strongest impact on those behaviors that require a high level of dynamic control. Our analysis integrated behavior and modulation of interhemispheric phase-based connectivity during dynamic motor-state transitions with endogenous GABA concentration in adult human volunteers. We provide converging evidence for age-related differences in the preferred state of endogenous GABA concentration for more flexible behavior. We suggest that the increased interhemispheric connectivity observed in the older participants represents a compensatory neural mechanism caused by phase-entrainment in homotopic motor cortices. This mechanism appears to be most relevant in the presence of a less optimal tuning of the inhibitory tone as observed during healthy aging to uphold the required flexibility of behavioral action. Future work needs to validate the relevance of this interplay between neural connectivity and GABAergic inhibition for other domains of flexible human behavior.
Identifiants
pubmed: 35523951
doi: 10.1038/s42003-022-03378-w
pii: 10.1038/s42003-022-03378-w
pmc: PMC9076638
doi:
Substances chimiques
gamma-Aminobutyric Acid
56-12-2
Banques de données
figshare
['10.6084/m9.figshare.14256314']
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
426Informations de copyright
© 2022. The Author(s).
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