Similar to the Granger causality analysis in BrainVoyager, 3dGC.R adopts bivariate auto-regressive modeling, a pure exploratory method, and focuses only on the connection of a target voxel with a seed region in a bivariate fashion. It starts with a pre-selected seed region, and finds out the potential connectivity between the seed region and the rest of the brain. This exploratory step may help select regions of interest for multivariate auto-regressive modeling with 1dGC.R. More details about the program can be found at
http://afni.nimh.nih.gov/sscc/gangc/3dGC
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afni.nimh.nih.gov]
Gang
