Fig. 6

The correlation between cognitive capacity and resting state fMRI. Panel (a) and (b): Regional time-domain entropy for the hippocampus was significantly and positively correlated with delayed memory in the single-domain group (r = 0.760, p = 2.56 × 10⁻⁴) and positively (but not significant) correlated with delayed memory in the multi-domain group. Panel (c): In the multi-domain group, regional functional entropy of the calcarine fissure and the surrounding cortex was significantly negatively correlated with the visuospatial test (r = −0.758, p = 2.72 × 10⁻⁴). Panel (d): The regions referred to in panels (a) and (b) are shown