2.2. Univariate Group Subtraction Analysis

A univariate group subtraction analysis was performed to identify activated brain regions while the subjects were performing the tasks. The fMRI images were processed and analyzed using FSL 6.0.2 (FMRIBs Software Library, www.fmrib.ox.ac.uk/fsl) software suite (Figure 1B). The pre-processing consisted of image reconstruction, distortion correction, motion correction, and slice timing correction. The HCPs structural MRI and fMRI were pre-processed using FSL 5.0.6 according to the HCP pre-processing pipeline (Glasser et al., 2013). Individual- and group-level univariate group subtraction analyses were done using FEAT (FMRI Expert Analysis Tool, v.6.00). Fifty subjects were randomly selected from the HCP dataset for this analysis.