" Yet where this idea really hits home is with the breath, the one response over which we have control and which, in turn, exerts control through the alarm system that is the autonomic nervous system. Porges says he realized a long time ago—because he is a musician, specifically a horn player—that the act of controlling the breath to control the rhythm of music and at the same time engaging the brain to execute the mechanics of music works like a mental therapy. To his mind, it has all the elements of pranayama yoga, a form of yoga that stresses breath control. Breath control is common in most of yoga but also in meditation, and even in modern-day “evidence-based practices” like cognitive behavioral therapy. Relax. Take a deep breath. This "

― John J. Ratey , Go Wild: Free Your Body and Mind from the Afflictions of Civilization