Abstract
INTRODUCTION
Despite prior research on the association between sarcopenia and cognitive impairment in the elderly, a comprehensive model that integrates various brain pathologies is still lacking.
METHODS
We used data from 528 non-demented older adults with or without sarcopenia in the Catholic Aging Brain Imaging (CABI) database, containing magnetic resonance imaging scans, positron emission tomography scans, and clinical data. We also measured three key components of sarcopenia: skeletal muscle index (SMI), hand grip strength (HGS), and the five times sit-to-stand test (5STS).
RESULTS
All components of sarcopenia were significantly correlated with global cognitive function, but cortical thickness and amyloid-beta (Aβ) retention had distinctive relationships with each measure. In the path model, brain atrophy resulting in cognitive impairment was mediated by Aβ retention for SMI and periventricular white matter hyperintensity for HGS, but directly affected by the 5STS.
DISCUSSION
Treatments targeting each sub-domain of sarcopenia should be considered to prevent cognitive decline.
Highlights
We identified distinct impacts of three sarcopenia measures on brain structure and Aβ.
Muscle mass is mainly associated with Aβ and has an influence on the brain atrophy.
Muscle strength linked with periventricular WMH and brain atrophy.
Muscle function associated with cortical thinning in specific brain regions.
Interventions on sarcopenia may be important to ease cognitive decline in the elderly.
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This post is Copyright: Sunghwan Kim,
Sheng‐Min Wang,
Dong Woo Kang,
Yoo Hyun Um,
Han Min Yoon,
Soyoung Lee,
Yeong Sim Choe,
Regina EY Kim,
Donghyeon Kim,
Chang Uk Lee,
Hyun Kook Lim | June 19, 2024