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Updated: May 24, 2026
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Working Memory Training for Older Participants: A Control Group Training Regimen and Initial Intellectual Functioning Assessment
Published on: September 20, 2020
White matter predictors of cognitive functioning in older adults
Irene B Meier1, Jennifer J Manly, Frank A Provenzano
1Taub Institute for Research on Alzheimer's Disease and the Aging Brain, College of Physicians and Surgeons, Columbia University, New York, New York 10032, USA.
Summary
White matter hyperintensities (WMH) in the frontal lobes are linked to memory decline in older adults. Diffusion tensor imaging (DTI) measures of white matter integrity did not significantly predict cognitive function in this African American sample.
Area of Science:
- Neuroimaging
- Neurology
- Gerontology
Background:
- Few studies have explored multiple imaging techniques to understand cognitive links with white matter integrity.
- White matter hyperintensities (WMH) and fractional anisotropy (FA) are key imaging markers for brain health.
Purpose of the Study:
- To investigate the predictive utility of T2-weighted MRI-derived WMH and DTI-derived FA for cognitive functioning in older adults.
- To compare WMH and FA across different cognitive diagnostic groups (normal controls, MCI, probable AD).
Main Methods:
- Quantitative MRI (T2-weighted and DTI) and neuropsychological tests were administered to 112 older African American participants.
- Regional WMH volumes and FA were measured, and their association with cognitive performance was analyzed.
- Differences in WMH and FA were compared between normal controls, mild cognitive impairment (MCI), and probable Alzheimer's disease (AD) groups.
Main Results:
- Increased WMH volume in the frontal lobes correlated with poorer delayed memory performance.
- FA was not a significant predictor of cognitive function in this cohort.
- WMH volume was elevated in MCI and further increased in AD patients compared to controls, particularly in frontal and parietal lobes.
Conclusions:
- Regionally distributed small vessel cerebrovascular disease, indicated by WMH, is important for memory performance and Alzheimer's disease progression in older African Americans.
- White matter microstructural changes measured by DTI appear to play a less significant role in cognitive function within this specific sample.
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