From: http://www.theage.com.au/articles/2004/04/09/1081326925933.html?from=storyrhs
(snip) Even more bizarre in his efforts to gain a competitive advantage is the Swedish professional Jesper Parnevik. While travelling in planes, he has been known to wear sunglasses with flashing lights that supposedly synchronise the left and right sides of his brain.
While the logic is harder to follow than that of the golf hat, we thought we would speculate anyway. The left side of the brain is thought to be responsible for the control of logical, rational thinking (not one of Parnevik's strong points), language and speech. The right side controls visual imagery, musical rhythm and melody, imagination and creativity.
Many people tend to have one dominant side of the brain. Learning, however, is thought to be most effective when both sides of the brain are involved in the learning process.
In golf - a game that is considered as much mental as it is physical - it's likely that both sides of the brain are required for maximal performance. Hence any attempt to synchronise both sides of the brain may be valuable. The question of how Jesper's sunglasses actually do this is something best left to the neurophysiologists.
Before rushing out to buy the hat or sunnies, a final word of caution. Last we heard, Halle was talking to the rules secretary of the Royal and Ancient Golf Club at St Andrews about whether his hat was primarily designed to stop the wind blowing it off players' heads, or a golf swing aid, which is illegal.
Parnevik, meanwhile, is best remembered for his three-month diet that consisted of nothing but fruit and volcanic ash in order to cleanse the body.
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