Image analysis pathway: Analysis of Functional NeuroImages (AFNI) software package was used to evaluate basic structural and functional images (Cox, 1996), while a multivariate regressor approach evaluated changes in echo planar images (EPI) intensity in relation to task characteristics (Haxby et al., 2000). Image translation and rotation relative to all other images were minimized using a 3D-coregistration algorithm for each subject (Eddy et al, 1996), including six motion regressors. EPI scan slices were temporally aligned following registration to ensure that different relationships with regressors did not reflect acquisition of different slices at different times during the repetition interval.
