Pulse roundup: Joining the chorus has healing benefits; overeating cycles

... appears to stimulate the vagus nerve, slowing the heart and achieving the kind of relaxation seen in practitioners of yoga. But when a whole group experiences these benefits, the effect may be multiplicative. Synchrony, and the rituals that instill ...

http://www.oregonlive.com/health/index.ssf/2013/07/pulse_roundup_joining_the_chor.html