Oh...and I've *never* heard of "double U fibers" and haven't got a clue what in the world that would mean. Lesions at the juxtacortical areas are practically pathognomonic for MS, but I've no idea what "double U fibers" indicates.
While in some people they may be both numerous and widespread throughout the brain and like white matter lesions, Virchow-Robin spaces are not usually present in the brains of healthy young adults. The presence of Virchow-Robin has been associated with multiple diseases.
This space is involved in Perivascular Cuffing seen in meningoencephalitis & encephalitis where there are infiltrates of mononuclear cells.
This came from a site on brain imaging.
Generally, the white matter pathways can be classified in three groups (4). The first group, the association fibers, interconnects regions within the same hemisphere. The second group, the commisural fibers, cross the brain midline and interconnect matching regions of the two hemispheres. Finally, the projections fibers connect the cerebral cortex with the brainstem and spinal cord. Figures 2.2a-2.2c show several white matter fiber tracts that were revealed using brain fiber dissection technique.
Association fibers are formed by both short and long pathways within the same hemisphere (Figure 2.2a). The short pathways, also called U-fibers, connect gray matter of adjacent gyri. (a convoluted ridge between anatomical grooves)
It is not something I understand. I googled and this is some of the info I found.
I am sure someone on here knows more than I...however in this area they would not have to know much to be ahead of me...lol
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