¥Data Preparation: Co-Registration
HGroup analyses are performed on a voxel-by-voxel basis
HAll data sets used in the analysis must be aligned and defined over the same spatial domain.
åTalairach domain for volumetric data
íLandmarks for the transform are set on high-res. anatomical data using AFNI (http://afni.nimh.nih.gov/afni/edu/afni08.pdf)
íFunctional data volumes are then transformed using AFNI interactively or adwarp from command line (use option -dxyz with same resolution as EPI data)
åStandard meshes and spherical coordinate system for surface data
íSurface models of the cortical surface are warped to match a template surface using Caret/SureFit (http://brainmap.wustl.edu) or FreeSurfer (http://surfer.nmr.mgh.harvard.edu)
íStandard-mesh surface models are then created with SUMA (http://afni.nimh.nih.gov/ssc/ziad/SUMA) to allow for node-based group analysis using AFNIÕs programs
åAnalysis is carried out voxel-by-voxel or node-by-node
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