Extended Data Fig. 8. Effector-specificity of task fMRI activations.

In each participant, in the a, abdominal flexure task and the b, eyebrow raising task, the inter-effector regions and cingulo-opercular network (CON) were active. By contrast, in c, toe and d, hand motion tasks, activation was much more specific to a single region of somatomotor cortex. e, Across tasks, the degree of CON activation was consistently similar to the activation of the inter-effector regions (correlation between CON and inter-effector activations: all Pearson’s r > 0.81, P < 10⁻⁵, FDR corrected), but not consistently to hand (CON vs hand: Pearson’s r > 0.05, P < 0.82) or foot (CON vs foot: Pearson’s r > 0.33, P < 0.13) regions, and more weakly to mouth regions (CON vs mouth: Pearson’s r > 0.61, P < 0.003). Illustrated activation values are averaged across participants and ordered based on CON activation.