When listening to music, brainwaves move from the high-beta of normal waking consciousness down into the meditative (and trance-inducing) ranges of alpha and theta. At the same time, levels of stress hormones like norepinephrine and cortisol drop, while social bonding and reward chemicals like dopamine, endorphins, serotonin, and oxytocin spike. Add in entrainment—where people’s brains synch to both the beat and to the brains of those around them—and you’ve got a potent combination for communitas.
