Cited by 492Dementia and Cognitive Impairment ResearchAdvanced Neuroimaging Techniques and ApplicationsAlzheimer's disease research and treatments

White matter changes in mild cognitive impairment and AD: a diffusion tensor imaging study

Medina, David, deToledo-Morrell, Leyla, Urresta, Fabio, Gabrieli, John D.E., Moseley, Michael, Fleischman, Debra, Bennett, David A., Leurgans, Sue +2 more·2006·Neurobiology of Aging

Abstract

Diffusion tensor imaging (DTI) can detect, in vivo, the directionality of molecular diffusion and estimate the microstructural integrity of white matter (WM) tracts. In this study, we examined WM changes in patients with Alzheimer's disease (AD) and in subjects with amnestic mild cognitive impairment (MCI) who are at greater risk for developing AD. A DTI index of WM integrity, fractional anisotropy (FA), was calculated in 14 patients with probable mild AD, 14 participants with MCI and 21 elderly healthy controls (NC). Voxel-by-voxel comparisons showed significant regional reductions of FA in participants with MCI and AD compared to controls in multiple posterior white matter regions. Moreover, there was substantial overlap of locations of regional decrease in FA in the MCI and AD groups. These data demonstrate that white matter changes occur in MCI, prior to the development of dementia.

Integrity signals

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Crossref · 10.1016/j.neurobiolaging.2005.03.026

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  • Results from DTI show that fibre tract alterations are widespread in the brain at the stage of mild cognitive impairment and Alzheimer's disease dementia.

    “Results from DTI showed that fibre tract alterations are widespread in the brain at the stage of mild cognitive impairment and Alzheimer’s disease dementia (Bozzali et al., 2002; Medina et al., 2006; Acosta-Cabronero et al., 2010, 2012; Sexton et al., 2011; Bosch et al., 2012; for reviews see Acosta-Cabronero and Nestor, 2014; Teipel et al., 2015).”
  • We controlled for the influence of white matter hyperintensities, i.e. macrostructural white matter changes that can significantly alter DTI measures such as mean diffusivity.

    “We controlled for the influence of white matter hyperintensities, i.e. macrostructural white matter changes that can significantly alter DTI measures such as mean diffusivity (Medina et al., 2006).”
  • White matter abnormalities emerge as early findings in the aging brain and sporadic Alzheimer's disease.

    “White matter (WM) abnormalities emerge as early findings in the aging brain and sporadic Alzheimer's disease (AD) (Amlien & Fjell 2014;Bartzokis 2004;Medina et al. 2006).”

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Authors
Medina, D., deToledo-Morrell, L., Urresta, F., Gabrieli, J. D. E., Moseley, M., Fleischman, D., Bennett, D. A., Leurgans, S., Turner, D. A., & Stebbins, G. T.
Affiliations
  • Rush University Medical Center (US)
  • Stanford University (US)
Corresponding author
Stebbins, Glenn T.
Venue
Neurobiology of Aging
Publisher
Elsevier BV
Published
2006-05
Volume
27
Issue
5
Pages
663-672
ISSN
0197-4580 (ISSN-L)
OpenAlex
W2123261378
Cited by
492
References
77
Citations by year
2026: 6 · 2025: 9 · 2024: 3 · 2023: 9 · 2022: 9 · 2021: 7 · 2020: 10 · 2019: 16 · 2018: 20 · 2017: 26 · 2016: 16 · 2015: 26 · 2014: 25 · 2013: 38 · 2012: 40
FWCI
15.44
Type
journal article
Language
en
Open access
closed
Locations
  • Neurobiology of Aging (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute on Aging (R01AG017917, AG 10161, AG-17917, AG09466, P30AG010161, P01AG009466)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Advanced Neuroimaging Techniques and Applications
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
Keywords
white matter integrity, mild cognitive impairment, Alzheimer's disease, fractional anisotropy, diffusion tensor imaging, amnestic MCI, dementia risk, white matter microstructure
MeSH terms
Aged, Aged, 80 and over, Alzheimer Disease, Brain, Cognition Disorders, Data Interpretation, Statistical, Female, Humans, Image Processing, Computer-Assisted, Male, Middle Aged, Psychiatric Status Rating Scales, Anisotropy, Infarction, Middle Cerebral Artery, Diffusion Magnetic Resonance Imaging

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