fMRI data were collected on a 1) 3T Siemens Verio MRI scanner at CWRU, 2) 3T Philips Achieva X-series MRI scanner at CCH, and 3) 3T Siemens Trio MRI scanner at UPMC. An axial 3D magnetization prepared rapid gradient echo (MP-RAGE) sequence (192 axial slices 1 mm thick; flip angle=9°; field of view=256 mm × 192 mm; TR=2300 msec; TE=3.93 msec; matrix=256×192) acquired T1-weighted volumetric anatomical images covering the whole brain. A reverse interleaved gradient echo planar imaging (EPI) sequence (38 axial slices 3.1 mm thick; flip angle=90°; field of view=205 mm; TR=2000 msec; TE=28 msec; matrix=64×64) acquired T2-weighted BOLD images covering the whole cerebrum and most of the cerebellum.
Preprocessing involved realignment, coregistration, segmentation, normalization into a standard stereotactic space (Montreal Neurologic Institute, MNI;http://www.bic.mni.mcgill.ca ), and spatially smoothing using a Gaussian kernel (FWHM: 8mm). The detailed preprocessing stream is described in supplemental materials . A two level random-effects procedure was then used to conduct whole brain analyses. At the first level individual whole brain statistical maps were constructed to evaluate the main condition contrasts of interest: win versus control. Movement parameters obtained from the realignment stage of preprocessing served as covariates of no interest.
Preprocessing involved realignment, coregistration, segmentation, normalization into a standard stereotactic space (Montreal Neurologic Institute, MNI;