Cited by 245Dementia and Cognitive Impairment ResearchAdvanced Neuroimaging Techniques and ApplicationsAlzheimer's disease research and treatments

Diffusion tensor imaging in Alzheimer’s disease and mild cognitive impairment.

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Stebbins, G. T., Murphy, C. M.·2009·Behavioural Neurology

Abstract

Structural magnetic resonance imaging (MRI) studies of Alzheimer’s disease and mild cognitive impairment (MCI) have focused on the hippocampus and entorhinal cortex; gray matter structures in the medial temporal lobe. Few studies have investigated the integrity of white matter in patients with AD or MCI. Diffusion tensor imaging (DTI) is a MRI technique that allows for the interrogation of the microstructural integrity of white matter. Based on increases in translational diffusion (mean diffusivity: MD) and decreases directional diffusion (fractional anisotropy: FA) damage to white matter can be assessed. Studies have identified regions of increased MD and decreased FA in patients with AD and MCI in all lobes of the brain, as well as medial temporal lobe structures including the hippocampus, entorhinal cortex and parahippocampal white matter. The pattern of white matter integrity disruption tends to follow an anterior to posterior gradient with greater damage noted in posterior regions in AD and MCI. Recent studies have exploited inter-voxel directional similarities to develop models of white matter pathways, and have used these models to assess the integrity of inter-cerebral connections. Particular focus has been applied to the parahippocampal white matter (including the perforant path) and the posterior cingulum. Although many studies have found DTI indicators of impaired white matter in AD and MCI, other studies have failed to detect any differences in MD or FA between the groups, demonstrating the need for large replicative studies. DTI is an evolving technique and advances in its application ought to provide new insights into AD and MCI.

Integrity signals

Registry

Crossref · 10.1155/2009/915041

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  • Diffusion MRI is more sensitive to brain microstructural changes than conventional volumetric MRI and has been widely used for evaluation of white matter integrity.

    “Compared to the conventional volumetric MRI methods, diffusion MRI (dMRI) is more sensitive to the brain microstructural changes and has been widely used for the evaluation of white matter integrity (Bozzali et al., 2002; Mielke et al., 2009; Stebbins and Murphy, 2009; Wang et al., 2019b; Harrison et al., 2020; Veale et al., 2021).”
  • The animal fractional anisotropy data differ from patterns of FA changes in patients with Alzheimer's disease.

    “The animal data differ from patterns of FA changes in patients with AD, where regions marked by reduced FA include the temporal lobes, hippocampus, posterior cingulum and occipital lobe (Stebbins and Murphy, 2009).”

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Authors
Stebbins, G. T., & Murphy, C. M.
Affiliations
Rush University Medical Center (US)
Corresponding author
Stebbins, G. T.
Venue
Behavioural Neurology
Publisher
Wiley
Published
2009
Volume
21
Issue
1-2
Pages
39-49
ISSN
  • 0953-4180 (ISSN-L)
  • 1875-8584
OpenAlex
W4231345253
Cited by
245
References
10
Citations by year
2026: 5 · 2025: 13 · 2024: 8 · 2023: 10 · 2022: 12 · 2021: 13 · 2020: 10 · 2019: 11 · 2018: 11 · 2017: 15 · 2016: 17 · 2015: 20 · 2014: 23 · 2013: 25 · 2012: 14
FWCI
10.72
Type
journal article
Language
en
Open access
Locations
  • Behavioural Neurology (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
National Institute on Aging (P01 AG09466)
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
Alzheimer's disease, mild cognitive impairment, white matter integrity, diffusion tensor imaging, mean diffusivity, fractional anisotropy, perforant path, posterior cingulum, hippocampus, entorhinal cortex, white matter microstructure
MeSH terms
Alzheimer Disease, Brain, Brain Mapping, Cognition Disorders, Humans, Image Processing, Computer-Assisted, Nerve Fibers, Myelinated, Anisotropy, Diffusion Magnetic Resonance Imaging

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