Participants completed the protocol across 2 appointments, which included a 1-hour scan session. Images were acquired on a 1.5 Tesla General Electric Signa LX scanner. A high-resolution structural image was collected in the sagittal plane using an inversion recovery prepared T1-weighted 3-dimensional spiral fast-spin echo sequence (repetition time = 2,000 ms; echo time = 16 ms; field of view = 240 mm; resolution = 0.9375 mm × 0.9375 mm × 1.328 mm) (Wong et al., 2000). Functional imaging was collected in the axial plane using T2-weighted spiral gradient recall echo imaging (repetition time = 3,000 ms; echo time = 40 ms; flip angle = 90°; field of view = 240 mm; 20 continuous slices; slice thickness = 7 mm; in-plane resolution = 1.875 mm × 1.875 nm; 156 repetitions).
