Meditation is a set of widely disparaging techniques from various places whose ultimate purpose is to get you to relax deeply. Think of it as the human corallary to bear hibernation. In this state, the parasympathetics are in full swing repairing your body. And the sympathetics are shut completely off, freeing you from their abraision. Thoughts become vivid.
Creativity is accessed.
Chant - Mantra Vibration is a characteristic of all creation. And all creatures have song. Therapeutic value of chanting comes from the vibration resonating through your body, especially the nervous system. Also significant is that chanting is a special form of controlled breathing. Air pressure created to vibrate the vocal cords, increases in the lungs pushing added oxygen into the bloodstream.