FIGURE 2.

The brain regions with significant differences of the CBF-ReHo ratio among groups. The voxel-based analysis demonstrates the survived clusters among HC, PD-NC, and PD-MCI groups. These clusters are referred to multiple comparisons correction using the FWE rate (a cluster-defining threshold of P = 0.001 and a corrected cluster significance of P < 0.05). The region with the significant difference among the three groups is shown with warm color. CBF, cerebral blood flow; ReHo, regional homogeneity; HC, healthy control; PD, Parkinson’s disease; NC, normal cognition; MCI, mild cognitive impairment; FWE, familywise error; R, right; L, left.