Salience Network Functional Connectivity Mediates Association Between Social Engagement and Cognition in Non-Demented Older Adults: Exploratory Investigation.

Publisher: IOS Press Country of Publication: Netherlands NLM ID: 101705500 Publication Model: eCollection Cited Medium: Internet ISSN: 2542-4823 (Electronic) Linking ISSN: 25424823 NLM ISO Abbreviation: J Alzheimers Dis Rep Subsets: PubMed not MEDLINE

Original Publication: Amsterdam : IOS Press, [2017]-

Background: Social engagement has beneficial effects during cognitive aging. Large-scale cognitive brain network functions are implicated in both social behaviors and cognition.
Objective: We evaluated associations between functional connectivity (FC) of large-scale brain cognitive networks and social engagement, characterized by self-reported social network size and contact frequency. We subsequently tested large-scale brain network FC as a potential mediator of the beneficial relationship between social engagement and cognitive performance.
Methods: 112 older adults (70.7±7.3 years, range 54.6-89.7; 84 women) completed the Lubben Social Network Scale 6 (LSNS-6), National Alzheimer's Coordinating Center (NACC) Uniform Data Set 3 (UDS-3) cognitive battery, and resting state fMRI. We completed seed-based correlational analysis in the default mode and salience networks. Significant associations between social engagement scores and cognitive performance, as well as between social engagement and FC of brain networks, informed the construction of mediation models.
Results: Social engagement was significantly associated with executive function and global cognition, with greater social engagement associated with better cognitive performance. Social engagement was significantly associated with salience network FC, with greater social engagement associated with higher connectivity. Salience network FC partially mediated associations between social engagement and both executive function and global cognition.
Conclusions: Our results suggest that the salience network is a key mediator of the beneficial relationship between social engagement and cognition in older adults.
Competing Interests: The authors have no conflict of interest to report.
(© 2024 – The authors. Published by IOS Press.)

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Keywords: Alzheimer’s disease; cognitive aging; functional connectivity; older adults; salience network; social engagement

Date Created: 20240329 Latest Revision: 20240330

20240330

PMC10977456

10.3233/ADR-220082

38549634