Normative model for speech observation task for the (A) left and (B) right hemispheres. Weights reflect model fit for an average control group. Highlighted pathways are those of significant (>0.4) weighting (reflecting directional influence/connectivity) for the observation task in the normal population. Region abbreviations are as follows: antST, anterior superior temporal gyrus/sulcus; IP, inferior parietal lobule; LPMCd, dorsolateral premotor cortex; LPMCv, ventrolateral premotor cortex; M1, primary sensorimotor cortices; postST, posterior superior temporal gyrus/sulcus.