Noise amplitude and structural degree jointly influence the structural effects of stimulation.

(A) Structural effects under different combinations of stimulation sites and noise amplitudes. (B) Structural effects as a function of noise amplitude for all stimulation sites, ranked by structural degree. Note that the values in (A) and (B) represent the ensemble averages of 30 realizations of corresponding measures. (C) Pearson correlation coefficient (r) and adjusted coefficient of determination (R²) between structural effects and structural degree as a function of the noise amplitude. The solid lines and shaded areas describe the ensemble averages and standard deviations of 30 realizations of corresponding measures. (D) (E) (F) (G) Snapshots of structural effects under different noise amplitudes for one realization. (D) Noise amplitude = 10⁻⁹, Pearson’s r = −0.53, p < 0.01. (E) Noise amplitude = 10⁻⁷, Pearson’s r = −0.35, p < 0.01. (F) Noise amplitude = 10⁻⁵, Pearson’s r = −0.3, p < 0.01. (G) Noise amplitude = 10⁻³, Pearson’s r = 0.9, p < 0.01. The gray lines represent the linear fits of data points estimated by ordinary least squares. FDR correction was performed for p-values across all noise amplitudes and realizations.