All imaging data were obtained on the 3T Siemens Magnetom Trio scanner (Siemens Medical Solutions, Erlangen, Germany) in the Anhui Provincial Hospital. A circularly polarized head coil was used, with foam padding to restrict head motion. Functional images were acquired with a T2*-weighted echo-planar imaging sequence (TE = 30ms, TR = 2s, FOV = 24cm, Matrix=64×64) with 22 axial slices (slice gap = 0.4 mm, voxel size: 3.75×3.75×4 mm3), covering the parietal lobe, the occipital lobe and a large portion of the frontal lobe and the temporal lobe (the slices were approximately along the AC-PC line and covered about −30 to 60 in the IS direction). Resting-state fMRI data were acquired with one run of six minutes (180 images per slice). Corresponding high-resolution T1-weighted spin-echo (for anatomical overlay) images and three-dimensional gradient-echo (for stereotaxic transformation) images were also collected. Before entering the scanner, all participants were told to close their eyes, remain still and relaxed, and stay awake during the scanning. After the resting-state scanning, several functional activation runs were acquired with cognitive tasks (data to appear elsewhere). All participants
