A 3T Philips Achieva MRI scanner (Philips Medical Systems, Bothell, WA) was used to collect functional echo-planar image (EPI) data continuously with 3 mm in-plane resolution and 4 mm slice thickness. We covered the entire brain by obtaining 32 slices of 64×64 voxels using a 2000 ms repetition time (TR) and 25 ms echo time (TE). We also acquired a single-volume high resolution (2×2×2 mm) EPI image and a 1×1×1 mm spoiled gradient recalled (SPGR) image for each subject for purposes of registration.
