Fig. 1

One-sample t-test group analysis. A The language network as identified by functional connectivity analysis at rest (LANG). B The contrast covert speech production > tones-listening (Covert). C The contrast overt speech production > tones-listening (Overt). Images are projected on an MNI template. The left side of the brain is on the left. Images are shown corrected for multiple comparison FWE = 0.05 at the voxel-level with a minimum cluster extent k = 5. The color bar indicates t-values. White numbers are the coordinates of the corresponding slices. Note the increasing recruitment of the right middle temporal gyrus/superior temporal sulcus from (A) to (C) together with the laryngeal motor area within the precentral gyrus. Note also in B and C the strong activity induced by the explicit task within the main nodes of the cingulo-opercular network (AIFO, dACC, putamen) and the rightward shift in AIFO and putamen activity during the overt task