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VIDEO: This video is a map of edge density, a measure of the density of white matter connections between different brain regions. The color scale goes from dark purple where there. view more
Credit: Justin Reber, University of Iowa
A new University of Iowa study challenges the idea that gray matter (the neurons that form the cerebral cortex) is more important than white matter (the myelin covered axons that physically connect neuronal regions) when it comes to cognitive health and function. The findings may help neurologists better predict the long-term effects of strokes and other forms of traumatic brain injury.