The superficial white matter in Alzheimer's disease

Human Brain Mapping
Owen PhillipsMargherita Di Paola

Abstract

White matter abnormalities have been shown in the large deep fibers of Alzheimer's disease patients. However, the late myelinating superficial white matter comprised of intracortical myelin and short-range association fibers has not received much attention. To investigate this area, we extracted a surface corresponding to the superficial white matter beneath the cortex and then applied a cortical pattern-matching approach which allowed us to register and subsequently sample diffusivity along thousands of points at the interface between the gray matter and white matter in 44 patients with Alzheimer's disease (Age: 71.02 ± 5.84, 16M/28F) and 47 healthy controls (Age 69.23 ± 4.45, 19M/28F). In patients we found an overall increase in the axial and radial diffusivity across most of the superficial white matter (P < 0.001) with increases in diffusivity of more than 20% in the bilateral parahippocampal regions and the temporal and frontal lobes. Furthermore, diffusivity correlated with the cognitive deficits measured by the Mini-Mental State Examination scores (P < 0.001). The superficial white matter has a unique microstructure and is critical for the integration of multimodal information during brain maturation and aging. Here we s...Continue Reading

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Citations

Jun 1, 2016·Frontiers in Neuroscience·Owen R PhillipsMargherita Di Paola
Feb 6, 2018·Nature Medicine·Axel MontagneBerislav V Zlokovic
Nov 5, 2017·Journal of Neurology, Neurosurgery, and Psychiatry·Owen Robert PhillipsCarsten Finke
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Mar 3, 2020·NeuroImage·Miguel GuevaraJean-François Mangin
Aug 20, 2021·Brain Imaging and Behavior·Yichen ZhangRuiwang Huang

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