Steps to a better brain

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Thought control is easier than you might imagine

IT SOUNDS a bit New Age, but there is a mysterious method of thought control you can learn that seems to boost brain power. No one quite knows how it works, and it is hard to describe exactly how to do it: it's not relaxation or concentration as such, more a state of mind. It's called neurofeedback. And it is slowly gaining scientific credibility.

Neurofeedback grew out of biofeedback therapy, popular in the 1960s. It works by showing people a real-time measure of some seemingly uncontrollable aspect of their physiology - heart rate, say - and encouraging them to try and change it. Astonishingly, many patients found that they could, though only rarely could they describe how they did it.

More recently, this technique has been applied to the brain - specifically to brain wave activity measured by an electroencephalogram, or EEG. The first attempts were aimed at boosting the size of the alpha wave, which crescendos when we are calm and focused. In one experiment, researchers linked the speed of a car in a computer game to the size of the alpha wave. They then asked subjects to make the car go faster using only their minds. Many managed to do so, and seemed to become more alert and focused as a result.

This early success encouraged others, and neurofeedback soon became a popular alternative therapy for ADHD. There is now good scientific evidence that it works, as well as some success in treating epilepsy, depression, tinnitus, anxiety, stroke and brain injuries.

And to keep up with the times, some experimenters have used brain scanners in place of EEGs. Scanners can allow people to see and control activity of specific parts of the brain. A team at Stanford University in California showed that people could learn to control pain by watching the activity of their pain centres (New Scientist, 1 May 2004, p 9).

But what about outside the clinic? Will neuro feedback ever allow ordinary people to boost their brain function? Possibly. John Gruzelier of Imperial College London has shown that it can improve medical students' memory and make them feel calmer before exams. He has also shown that it can improve musicians' and dancers' technique, and is testing it out on opera singers and surgeons.

Neils Birbaumer from the University of Tübingen in Germany wants to see whether neurofeedback can help psychopathic criminals control their impulsiveness. And there are hints that the method could boost creativity, enhance our orgasms, give shy people more confidence, lift low moods, alter the balance between left and right brain activity, and alter personality traits. All this by the power of thought.

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Steps to a better brain