Longitudinal evidence examines social network characteristics impacting brain volume changes in older adults, indicating potential dementia prevention strategies.
Background: As the global population ages, understanding factors influencing structural brain aging is crucial for dementia prevention. Social networks have emerged as important social factors; however, longitudinal evidence linking specific structural characteristics of social networks to brain volume change remains limited. This study examined whether social network homogeneity and heterogeneity were related to longitudinal changes in brain volume (hippocampus, gray matter, and prefrontal cortex) among community-dwelling older Japanese adults.
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Murayama et al. (2026) studied this question.
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