Specifically, what happens to the brain during TM practice?
EEG research shows that practice of the TM technique increases alpha activity (8 to 12 cycles per second) in all brain areas. Alpha activity is the hallmark of restful alertness, inner silence, and wide-awake self-awareness. In addition, TM practice increases coherence in the EEG signals in the frontal lobes—the prefrontal cortex or “CEO” of the brain. Perhaps more significantly, this increased frontal coherence is spontaneously maintained after TM practice during daily activity and has been correlated with improved executive processing—the basis of comprehensive planning, open-minded judgment, and wise decision-making.