Each participant received a magnetization prepared rapidly acquired gradient echo (MPRAGE) T1-weighted scan (repetition time [TR], 1900 ms; echo time [TE], 2.2 ms; inversion time, 900 ms; matrix, 256×256; number of excitations, 1; thickness, 1 mm; 176 slices) Resting state functional images were collected using an echo-planar imaging (EPI) sequence with the following parameters: repetition time (TR)= 2000 ms; echo time (TE)=40 ms; flip angle=90°; number of slices=28; slice thickness=4 mm; gap=1 mm; voxel size=4×4×4 mm3; and matrix=64×64. Participants were asked to lie quietly in the scanner with their eyes closed during the data acquisition. This scan lasted for 478 s. For each subject, the first five volumes were discarded to allow for T1 equilibration effects and the adaptation of the subjects to the circumstances, leaving 234 images for further analysis.