Figure 3. Proteinopathy, longitudinal resting-state functional connectivity (RSFC), and cognitive decline in Parkinson disease (PD).
(A) Within the PD group, sensorimotor network (SMN) RSFC strength declines the most for those with higher levels of CSF α-synuclein (i.e., +1 SD above the mean; blue line), while SMN RSFC strength is already reduced and remains relatively stable for those with lower levels (i.e., −1 SD below the mean; red line) of CSF α-synuclein. (B) Dorsal attention network (DAN)-FPCN internetwork strength declined the most among participants with PD with increased cognitive impairment (i.e., +1 SD above the mean; blue line), as measured by increased Clinical Dementia Rating (CDR) sum of boxes scores.
