The paradigm was configured as a mixed event-related, block design with 5 temporal and 5 spatial blocks that were interleaved for a total of 128 trials. Functional images were acquired on a Siemens 3 T TIM TRIO 32-channel scanner using a whole brain echo-planar imaging sequences (TR = 3 s, TE = 29 ms, slices = 47, field of view = 220 mm, flip angle = 90 degrees, bandwidth = 1684 Hz/pixel, voxel size = 2 × 2 × 2 mm3). A high-resolution (voxel size = 1 × 1 × 1 mm3) T1-weighted magnetization-prepared rapid acquisition with gradient echo (MP-RAGE) structural image was also acquired to register functional activations to anatomical images. Using Statistical Parametric Mapping (SPM8) software (Wellcome Centre for Neuroimaging, UCL, London), the data were high-pass filtered, motion-corrected, and spatially smoothed with a 5 mm FWHM Gaussian kernel. Each individual participant's brain map was registered to the standard MNI template to carry out group-level analyses.
