PMC

Statistical maps (p-value corrected) of cortical surfaces showing group differences in functional homogeneity measured by 2dReHo in fsaverage5 standard space. In TCC experts (compared to healthy control subjects), blue colors indicate decreases in 2dReHo, while red colors indicate increases in 2dReHo.

Scatter plots (A,B) show the (marginally) significant correlations between 2dReHo in the right PosCG and TCC practice hours and years, respectively. Scatter plots (C,D) show the (marginally) significant correlations between 2dReHo and reaction time and accuracy on the ANT, respectively. (ANT RT = reaction time on the ANT; ANT acc = accuracy on the ANT).

The computation of functional homogeneity on the cortical surface. (A) The geometry of the cortical surface (e.g., here, the lateral cortical surface of the left hemisphere). (B) The preprocessed R-fMRI data are projected onto vertices of the cortical surface. For a given vertex (yellow node), which is indicated as the light yellow patch in (A) and magnified in (B), the nearest neighbors are colored blue. Based on R-fMRI time series from all 19 vertices, the Kendall’s coefficient of concordance (KCC) of the center vertex is calculated as the regional homogeneity (ReHo). (C) Such calculations are repeated for all vertices on the surface to produce individual vertex-wise KCC-ReHo surface maps. The color map indicates the intensities of the KCC values.