Here is Dr Fehmi explaining the workings of his neurofeedback machine, the machine is a great tool for observing and training the brain. I first came across his work about two years ago and began to practice his Open Focus exercises on a daily basis.
The exercises are designed to reduce our common rigid attachment to narrow-objective attention. I have found them to be amazing in the way they helped me to relax and in the way they have enhanced my tai chi practice. You can listen and download one to try from the Open focus website.