Neural Networks Unravel a Racial Disparity in Multiple Sclerosis
A neuroimaging study reveals distinct patterns of brain network disruption in Black Americans with multiple sclerosis (MS) compared to their non-Hispanic white counterparts. Researchers used 3T MRI to analyze structural and functional connectivity within the sensorimotor and default mode networks in 100 people with MS and 76 healthy controls. Despite similar disease duration, lesion load, and brain volumes, Black patients exhibited higher physical disability and lower cognitive scores. Crucially, their brains showed greater “structure–function decoupling”—a misalignment between the physical wiring and the functional activity of neural circuits—particularly within the sensorimotor network. This decoupling showed a trend toward association with increased physical disability.
Why it might matter to you: This research provides a potential neurobiological basis for the more severe disease progression observed in Black patients with MS, moving beyond clinical observation to measurable network pathology. For neurologists and researchers, it highlights that standard MRI measures like lesion load may not capture the full picture of neurological disability, especially across racial groups. Understanding these specific patterns of network decoupling could guide more personalized monitoring strategies and inform the development of therapies aimed at preserving neural network integrity.
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