(i)
The nervous system
The practice of qigong can repair and regulate the nervous system. During practice the electroencephalogram shows an increase in α waves radiating from the occipital lobe toward the front, with concentration on the frontal lobe — unlike when α waves concentrate in the occipital lobe because we are at rest with our eyes closed. The left and right hemispheres synchronize: a sign that the functions of the brain have become more ordered. This regulates the involuntary nervous system and improves perception, so as to react intuitively and think systematically.
In the early 2000s Richard Davidson, of the University of Wisconsin in Madison, used brain imaging techniques to show that meditation shifts the activity of the prefrontal cortex (right behind the forehead) from the right hemisphere to the left. His research suggests that, with regular meditation, the brain turns from a mode of stress to one of acceptance — a change that increases fulfilment.