Fig. 4.

a, c: Statistical parametric maps (SPMs) showing in color the voxels activated in the subtraction acting person vs controls (blue outline), grasping hand vs controls (green), and the interaction, i.e. the difference between the previous subtractions (yellow) obtained in Experiment 1 (a) and Experiment 3 (c), shown on the flatmaps of the anterior portions of left (LH) and right (RH) hemispheres. Thresholds: p < 0.001 uncorrected in a and interaction in c, p < 0.01 uncorrected blue outline in c. Local maxima in c: 1: LH1: − 44, − 10, 56, 12 voxels, 2: LH2: − 56, 6, 38, 27 voxels; 3: LH3: − 32, − 10, 40, 29 voxels; 4: RH : 48, 0, 48, 109 voxels; notice that LH3 is located in the posterior branch of PCSi which folds behind the PCG in 3D; yellow dots encircled by black: local maxima of interaction in Experiment 4 averaging over frame rate (uncorrected: − 40, 0, 36, t = 4.77, p < 0.001 and 46, − 4, 44, t = 3.32, p < 0.003); b, d: differential activity (as % of fixation baseline) evoked by acting person vs controls (blue) and grasping hand vs controls (green) obtained in Experiment 1 (b) and Experiment 3 (d), plotted from dorsal to ventral for the miniROIs, shown in white in RH of a, c. Vertical bars SE. The difference between differential activity for acting person and grasping hand was significant in bins 8–10 in b (paired t tests p < 0.05) and bins 7–11 in d (p < 0.05 in post hoc t-tests following interaction in a 2 × 17 two way ANOVA, F_{16, 17} = 2.25, p < 0.005).