Davidson, whose youthful appearance and wide-open smile give him more than a passing resemblance to Jerry Seinfeld, has been studying the brain structures behind not just anxiety, depression, and addiction but also happiness, resilience, and, most recently, compassion. Using brain imaging technologies, in particular a device called a functional magnetic resonance imaging (fMRI) machine, a sort of Hubble telescope for the brain, Davidson and his researchers have observed the areas associated with various emotions and how their function changes as an individual moves through them. His "brain maps" have revealed the neural terrain of so-called normal adults and children, as well as those suffering from mood disorders and autism. Davidson has also studied a now rather famous group of subjects: Tibetan monks with years of Buddhist meditation under their gleaming pates.
Probably his most well-known study mapped the brains of employees at a biotech company, more than half of whom completed about three hours of meditation once a week led by Jon Kabat-Zinn, PhD, founding director of the Stress Reduction Clinic at the University of Massachusetts Medical School. After four months, the meditating subjects noticed a boost in mood and decrease in anxiety, while their immune systems became measurably stronger. What made headlines, though ("The Science of Happiness" sang a January 2005 Time magazine cover), was that Davidson vividly showed that meditation produced a significant increase in activity in the part of the brain responsible for positive emotions and traits like optimism and resilience—the left prefrontal cortex. In meditating monks, he'd separately found, this area lit up like the lights in Times Square, showing activity beyond anything he and his team had ever seen—a neurological circuit board explaining their sunny serenity.
These and other findings of Davidson's have bolstered mounting research suggesting that the adult brain is changeable, or "plastic," as opposed to becoming fixed in adolescence. What this means is that although an individual may be born with a predisposition toward gloominess or anxiety, the emotional floor plan can be altered, the brain's furniture moved to a more felicitous arrangement; with a little training, you can coax a fretful mind toward a happier outlook. It's a new understanding of the brain that represents a paradigm shift of seismic importance, and one that's sent a steady stream of reporters out to Madison like pilgrims on the road to Santiago. Perhaps just as seismic is Davidson's "coming out of the closet" (his phrase) as a highly regarded, marquee-name brain researcher with a focus on contemplation, and a commitment to putting compassion and spirituality on the scientific map.