Mothers and children were transported by our research driver and nurse to the Cape Universities Brain Imaging Centre (CUBIC) for scanning. Each child was scanned, using a single-channel head coil, on a 3 T Allegra MR scanner (Siemens, Erlangen, Germany).
High-resolution T1-weighted magnetization-prepared rapid gradient echo (MPRAGE) anatomical scans were acquired in a sagittal orientation using a three-dimensional motion corrected multi-echo sequence(Tisdall et al., 2009 , van der Kouwe et al., 2008 (link)), with the following parameters: TR 2530 ms, TEs 1.53/3.21/4.89/6.57 ms, 128 slices, slice thickness 1.3 mm, flip angle 7°, field of view 256 mm, voxel size 1.3 × 1.0 × 1.3 mm3, and scan time 8:07 min. Each of the three encoding sessions followed the same fMRI acquisition protocol. Specifically, within each session, 124 functional T2*-weighted volumes sensitive to blood-oxygen level dependent (BOLD) contrast were acquired using a gradient echo, echo planar sequence with the following parameters: TR 2000 ms, TE 30 ms, 34 slices, slice thickness 3 mm, flip angle 90°, field of view 200 mm, voxel size 3.1 × 3.1 × 3.0 mm3, and scan time 4:12 min.
High-resolution T1-weighted magnetization-prepared rapid gradient echo (MPRAGE) anatomical scans were acquired in a sagittal orientation using a three-dimensional motion corrected multi-echo sequence(Tisdall et al., 2009 , van der Kouwe et al., 2008 (link)), with the following parameters: TR 2530 ms, TEs 1.53/3.21/4.89/6.57 ms, 128 slices, slice thickness 1.3 mm, flip angle 7°, field of view 256 mm, voxel size 1.3 × 1.0 × 1.3 mm3, and scan time 8:07 min. Each of the three encoding sessions followed the same fMRI acquisition protocol. Specifically, within each session, 124 functional T2*-weighted volumes sensitive to blood-oxygen level dependent (BOLD) contrast were acquired using a gradient echo, echo planar sequence with the following parameters: TR 2000 ms, TE 30 ms, 34 slices, slice thickness 3 mm, flip angle 90°, field of view 200 mm, voxel size 3.1 × 3.1 × 3.0 mm3, and scan time 4:12 min.