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- W2045442080 abstract "As neurons of the developing brain form functional circuits, they undergo morphological differentiation. In immature cerebral cortex, radially-oriented cellular processes of undifferentiated neurons impede water diffusion parallel, but not perpendicular, to the pial surface, as measured via diffusion-weighted magnetic resonance imaging, and give rise to water diffusion anisotropy. As the cerebral cortex matures, the loss of water diffusion anisotropy accompanies cellular morphological differentiation. A quantitative relationship is proposed here to relate water diffusion anisotropy measurements directly to characteristics of neuronal morphology. This expression incorporates the effects of local diffusion anisotropy within cellular processes, as well as the effects of anisotropy in the orientations of cellular processes. To obtain experimental support for the proposed relationship, tissue from 13 and 31 day-old ferrets was stained using the rapid Golgi technique, and the 3-D orientation distribution of neuronal processes was characterized using confocal microscopic examination of reflected visible light images. Coregistration of the MRI and Golgi data enables a quantitative evaluation of the proposed theory, and excellent agreement with the theoretical results, as well as agreement with previously published values for locally-induced water diffusion anisotropy and volume fraction of the neuropil, is observed." @default.
- W2045442080 created "2016-06-24" @default.
- W2045442080 creator A5003632722 @default.
- W2045442080 creator A5010059570 @default.
- W2045442080 creator A5031858487 @default.
- W2045442080 creator A5057524884 @default.
- W2045442080 date "2012-01-01" @default.
- W2045442080 modified "2023-09-27" @default.
- W2045442080 title "Determination of Axonal and Dendritic Orientation Distributions Within the Developing Cerebral Cortex by Diffusion Tensor Imaging" @default.
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- W2045442080 doi "https://doi.org/10.1109/tmi.2011.2162099" @default.
- W2045442080 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3271123" @default.
- W2045442080 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/21768045" @default.
- W2045442080 hasPublicationYear "2012" @default.
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