Both static and dynamic functional connectivity differences between cognitively impaired and non-impaired active professional fighters were first explored. Significant decreased static functional connections and trend-level increased dynamic functional connections among regions involved in memory and executive functions were found in cognitively impaired fighters, which adds brain functional reorganizations to previously observed structural damages in brain deficits related to repetitive head trauma. We further demonstrated that both static and dynamic functional connectivity were sensitive to cognitive declines in this fighter’s cohort, as both static and dynamic functional features can reliably predict cognitive impairment status in fighters.
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