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Effects of Cognitive Reserve in Alzheimer's Disease and Cognitively Unimpaired Individuals.
- Source :
- Frontiers in Aging Neuroscience; 2/7/2022, Vol. 14, p1-13, 13p
- Publication Year :
- 2022
-
Abstract
- The concept of cognitive reserve (CR) has been proposed as a protective factor that modifies the effect of brain pathology on cognitive performance. It has been characterized through CR proxies; however, they have intrinsic limitations. In this study, we utilized two different datasets containing tau, amyloid PET, and T1 magnetic resonance imaging. First, 91 Alzheimer's disease (AD) continuum subjects were included from Alzheimer's Disease Neuroimaging Initiative 3. CR was conceptualized as the residual between actual cognition and estimated cognition based on amyloid, tau, and neurodegeneration. The proposed marker was tested by the correlation with CR proxy and modulation of brain pathology effects on cognitive function. Second, longitudinal data of baseline 53 AD spectrum and 34 cognitively unimpaired (CU) participants in the MEMORI dataset were analyzed. CR marker was evaluated for the association with disease conversion rate and clinical progression. Applying our multimodal CR model, this study demonstrates the differential effect of CR on clinical progression according to the disease status and the modulating effect on the relationship between brain pathology and cognition. The proposed marker was associated with years of education and modulated the effect of pathological burden on cognitive performance in the AD spectrum. Longitudinally, higher CR marker was associated with lower disease conversion rate among prodromal AD and CU individuals. Higher CR marker was related to exacerbated cognitive decline in the AD spectrum; however, it was associated with a mitigated decline in CU individuals. These results provide evidence that CR may affect the clinical progression differentially depending on the disease status. [ABSTRACT FROM AUTHOR]
- Subjects :
- ALZHEIMER'S disease
MAGNETIC resonance imaging
DISEASE progression
COGNITIVE ability
BRAIN diseases
PANEL analysis
BRAIN
BIOMARKERS
AMYLOID
CONFIDENCE intervals
ANALYSIS of variance
TAU proteins
NEUROPSYCHOLOGICAL tests
PEARSON correlation (Statistics)
RESEARCH funding
CHI-squared test
COGNITIVE testing
DATA analysis software
PROPORTIONAL hazards models
Subjects
Details
- Language :
- English
- ISSN :
- 16634365
- Volume :
- 14
- Database :
- Complementary Index
- Journal :
- Frontiers in Aging Neuroscience
- Publication Type :
- Academic Journal
- Accession number :
- 155104498
- Full Text :
- https://doi.org/10.3389/fnagi.2021.784054