Experimental protocol. The experiment included two stages. On the first day, the subjects underwent an rt-fMRI NF session (30 min, dark blue epoch) and were scanned during rest before and after (6 min, dark gray epochs). The NF session included three NF runs (10 min each); each run consisted of blocks of dACC-elevation conditions (40 s, light blue epochs) alternated with rest periods (20 s, light gray epochs). During the NF sessions, auditory feedback was continuously provided via headphones. On the second day, the subjects were scanned during rest again (6 min, gray epoch). Subjects were scanned with closed and covered eyes and all epochs were indicated by brief (<1 s) auditory cues (pink epochs, marked by arrows).