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Abstract #4803

Utilizing the human connectome project to quantify gray matter microstructural decline and cognitive correlates in healthy aging using MAP-MRI

Kavita Singh1, Stephanie Barsoum1, Kurt G Schilling2, Yang An3, and Dan Benjamini1
1Multiscale Imaging and Integrative Biophysics Unit, National Institute on Aging, NIH, Baltimore,MD USA 21224, Baltimore, MD, United States, 2Vanderbilt Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, TN, United States, Nashville, TN, United States, 3Brain Aging and Behavior Section, National Institute on Aging, NIH, Baltimore,MD USA 21224, Baltimore, MD, United States

Synopsis

Keywords: Aging, Aging, Mean Apparent Propagator MRI

Motivation: The mean apparent propagator (MAP)-MRI model, free from biophysical assumptions, shows high sensitivity to gray matter (GM) microstructural changes. Yet, its capacity to predict age-related cognitive and behavioral changes is uncharted.

Goal(s): To profile MAP-MRI based microstructural/volumetric changes in normal aging and its cognitive correlates.

Approach: Utilizing the HCP-Aging diffusion and cognitive datasets from 707 unimpaired participants, we investigated age associations in 56 GM regions and their cognitive correlates.

Results: MAP-MRI identified unique age-related patterns in GM regions, linked to memory and executive function decline, limbic network stability; suggesting potential for MAP-MRI in predicting age-related cognitive, behavioral, and microstructural changes.

Impact: MAP-MRI identified unique age-related patterns in GM regions, linked to memory and executive function decline, limbic network stability; suggesting potential for MAP-MRI in predicting age-related cognitive, behavioral, and microstructural changes.

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Keywords