FIG. 6.

Slow-5 and slow-4 fractional ALFF for pDMN in each of the population groups. Blue denotes slow-5 (0.01–0.027 Hz). Red denotes slow-4 (0.027–0.073 Hz). Pattern of a reduction in fALFF in the subacute stroke group was observed in comparison to the other population groups (Tukey honest significant difference, p = 0.12), whereas component slow-4 fALFF increased. Differences were also suggested in terms of the relative contribution of the slow-5 to that of the slow-4 oscillations when comparing the subacute stroke group with the older adult group (unpaired two-sample t-test, t₃₁ = 2.146, p = 0.039, dotted line/box). In that group, the slow-4 constituent of the intrinsic oscillations was noted as becoming the dominant contributor within the resting-state frequencies. fALFF, fractional ALFF.