““A study published by researchers at Massachusetts General Hospital in 2011 found that subjects who practiced meditation for an average of just twenty-seven minutes a day over a period of eight weeks produced visible changes in brain structure. Meditation led to decreased density of the amygdala, a physical change that was correlated with subjects’ self-reported stress levels—as their amygdalae got less dense, the subjects felt less stressed. Other studies have found that Buddhist monks who are especially good at meditating show much greater activity in their frontal cortices, and much less in their amygdalae, than normal people.n Meditation and deep-breathing exercises work for similar reasons as psychiatric medications do, exerting their effects not just on some abstract concept of mind but concretely on our bodies, on the somatic correlates of our feelings.””
