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About this paper

Yifei Sun, James M. Shine, Robert D. Sanders, Robin F. H. Cash, Sharon L. Naismith, Fernando Calamante, Jinglei Lv

Researchers at the University of Sydney and collaborators introduced a data-driven framework to map the functional organization of human white matter (WM) using Track Dynamic Functional Connectivity. They identified 132 functionally coherent WM clusters, showing widespread age-related declines in dynamic connectivity strength and temporal variability, and found that the mean dynamic functional coupling of specific clusters mediated the relationship between age and various cognitive measures.

Key insights

  • White matter possesses a functional organization beyond purely anatomical definitions, with 132 distinct functional clusters identified based on shared dynamic functional connectivity patterns.
  • Healthy aging is associated with a widespread reduction in both the strength and temporal variability of dynamic functional coupling across a majority of white matter tracts.
  • Specific white matter clusters, particularly within Control, Default Mode, Dorsal Attention, and Visual networks, mediate the association between chronological age and cognitive decline, highlighting their critical role in cognitive aging.

Summary by alphaXiv.

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