Circadian rhythms are associated with higher amyloid-β and tau and poorer cognition in older adults.

ABSTRACT: Several studies implicate circadian rhythm disturbances in Alzheimer's disease. However, very little is known about how circadian rhythms are associated with Alzheimer's pathological biomarkers in older adults at early stages of the disease, and how these relationships map onto cognition. This cross-sectional study used 24-h accelerometry data to investigate the relationships between circadian rhythms, amyloid-β (Aβ), tau, and cognition in 68 older adults with objective early cognitive impairment. Participants wore GENEActiv accelerometers for ∼1 month (mean = 31.8 days). Circadian rhythms measures were quantified from accelerometer data and included acrotime (average time of day of peak activity) and intradaily variability (IV) (average circadian rhythm fragmentation within a day). Aβ was

SUBMITTER: Eckhardt JL 

PROVIDER: S-EPMC12416565 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature