standard quadrature head coil. Functional images were collected using a
T2*-weighted gradient-echo echo-planar image (EPI) sequence providing full head
coverage (TR = 2320ms, TE = 25ms, flip angle = 60°, FOV
= 225 × 225, 3.5mm isotropic voxels [no gap], 40 axial
slices, oblique axial prescription parallel to AC-PC plane). Stimuli were back-projected
using E-Prime presentation software (Psychology Software Tools Inc., Pittsburgh, PA)
onto a translucent screen, viewed via a coil-mounted periscopic prism system.
Participants' behavioral responses were collected via fiber optic button box,
with two possible responses for both AF and AH conditions (‘same’ or
‘different’ identities). T1-weighted 2D anatomical images with the same
slice prescription as the EPI data (TR = 300ms, TE = 2.43ms, flip angle
= 60°), and a T1-weighted 3D anatomical MPRAGE volume (TR =
2530ms, TE = 3.66ms, TI = 1100ms, flip angle = 7°, 1mm
isotropic voxels), were acquired during the same session, for standard-space image
registration.