Yoga stimulates different nerves in your body, especially the Vagus nerve that carries information from the brain to most of the body's major organs, slows everything down and allows self-regulation. It's the nerve that is associated with the parasympathetic system and emotions like love, joy and compassion.
Deepak ChopraKarma, memory, and desire are just the software of the soul. It's conditioning that the soul undergoes in order to create experience. And it's a cycle. In most people, the cycle is a conditioned response. They do the same things over and over again.
Deepak Chopra