Association between loneliness and cognitive function, and brain volume in community-dwelling elderly

Area of Science:

• Neuroscience
• Gerontology
• Psychiatry

Background:

• Loneliness is a growing concern among the elderly population.
• Understanding its impact on cognitive function and brain structure is crucial for aging research.

Purpose of the Study:

• To investigate the association between loneliness, cognitive impairment, and regional brain volume in elderly Koreans.
• To identify specific cognitive domains and brain regions affected by loneliness.

Main Methods:

• Utilized data from the ARIRANG aging-cognition sub-cohort (2020-2022).
• Assessed loneliness using UCLA-Loneliness Scale (UCLA-LS) and CES-D-K.
• Measured cognitive impairment via K-MMSE-2 and SNSB-C.
• Employed logistic and linear regression for cognitive and volumetric analyses, respectively.

Main Results:

• Loneliness was significantly associated with increased cognitive impairment (K-MMSE-2 and SNSB-C total score).
• Specific cognitive declines in visuospatial, memory, and executive functions were noted in lonely individuals.
• Loneliness correlated with reduced brain volume in frontal white matter, putamen, and globus pallidus.

Conclusions:

• Loneliness is a significant factor associated with cognitive decline in the elderly.
• Structural brain changes, including reduced volume in specific regions, are linked to loneliness.
• Findings underscore the importance of addressing loneliness to promote brain health in aging.