Loading…

Altered Superficial White Matter on Tractography MRI in Alzheimer's Disease

Background/Aims: Superficial white matter provides extensive cortico-cortical connections. This tractography study aimed to assess the diffusion characteristics of superficial white matter tracts in Alzheimer's disease. Methods: Diffusion tensor 3T magnetic resonance imaging scans were acquired...

Full description

Saved in:
Bibliographic Details
Published in:Dementia and geriatric cognitive disorders extra 2016-06, Vol.6 (2), p.233-241
Main Authors: Reginold, William, Luedke, Angela C., Itorralba, Justine, Fernandez-Ruiz, Juan, Islam, Omar, Garcia, Angeles
Format: Article
Language:English
Subjects:
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Background/Aims: Superficial white matter provides extensive cortico-cortical connections. This tractography study aimed to assess the diffusion characteristics of superficial white matter tracts in Alzheimer's disease. Methods: Diffusion tensor 3T magnetic resonance imaging scans were acquired in 24 controls and 16 participants with Alzheimer's disease. Neuropsychological test scores were available in some participants. Tractography was performed by the Fiber Assignment by Continuous Tracking (FACT) method. The superficial white matter was manually segmented and divided into frontal, parietal, temporal and occipital lobes. The mean diffusivity (MD), radial diffusivity (RD), axial diffusivity (AxD) and fractional anisotropy (FA) of these tracts were compared between controls and participants with Alzheimer's disease and correlated with available cognitive tests while adjusting for age and white matter hyperintensity volume. Results: Alzheimer's disease was associated with increased MD (p = 0.0011), increased RD (p = 0.0019) and increased AxD (p = 0.0017) in temporal superficial white matter. In controls, superficial white matter was associated with the performance on the Montreal Cognitive Assessment, Stroop and Trail Making Test B tests, whereas in Alzheimer's disease patients, it was not associated with the performance on cognitive tests. Conclusion: Temporal lobe superficial white matter appears to be disrupted in Alzheimer's disease.
ISSN:1664-5464
1664-5464
DOI:10.1159/000446770