MRI Imaging Data Acquisition

All MRI images were acquired using one 3-Tesla MRI scanner (Siemens, Erlangen, Germany) with an eight-channel phase-array brain coil. Foam pads and headphone were utilized to minimize the head motion and reduce noise, respectively. As in our previous studies (10–12), high-resolution T1-weighted images were obtained with a standard magnetization prepared rapid gradient echo (MP-RAGE) sequence [repetition time (TR)/echo time (TE) 2,530/2.34 ms, flip angle (FA) 7°, field of view (FOV) 256 × 224 mm, slice thickness 1.0 mm]. The resting-state fMRI data were collected by one echo-planar imaging (EPI) sequence (TR/TE 2,500/21 ms, FA 90°, FOV 200 × 200 mm, matrix 64 × 64, 42 slices without gap, voxel size 3.5 × 3.1 × 3.1 mm). The images of 200 time points were collected, and the total amount of fMRI acquisition time is 500 s. During the resting-state fMRI scan, the participants were asked to relax, to close their eyes, not to think of anything in particular, and not to fall asleep. Wakefulness of participants has been confirmed immediately after the fMRI scanning session.