Figure 4
From: The measurement, evolution, and neural representation of action grammars of human behavior

Covariance of BOLD response with tool-making stimulus structural complexity. Outlines corresponding to areas yielding significant correlation with the CFG (purple) and HMM (yellow) covariates describing action sequence complexity. Heatmap clusters represent the minimum of these two correlations where they overlap voxel-wise in the right pars opercularis of the inferior frontal gyrus (right).