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High-Frequency Noise Boosts Math Skills in Study
Date:5/16/2013

By Randy Dotinga
HealthDay Reporter

THURSDAY, May 16 (HealthDay News) -- Could you someday zap your way to a smarter brain? Preliminary new research suggests that it's a possibility: Scientists report that they were able to improve the math-calculation skills of college students by buzzing their brains with doses of random high-frequency noise.

But don't go searching for a brain zapper at Walmart just yet. It's not clear why "transcranial random noise stimulation" might boost thinking skills, and the necessary equipment isn't sitting on the shelves at your local hardware store. The treatment is considered to be harmless but has only been studied for a few years, and the study findings aren't definitive.

For now, though, the results of the new study are promising, said author Roi Cohen Kadosh, a cognitive neuroscientist at the University of Oxford, in England. "We can enhance one of the most complicated high-level cognitive [mental] functions and improve brain response after just five days of training, with a long-lasting effect six months later."

Scientists have only been studying transcranial random noise stimulation for about five years, Cohen Kadosh said. Researchers use the technique to stimulate the brain's cortex by putting electrodes on the scalp and delivering random bits of electrical noise. "It is non-invasive, painless -- the level of current is generated by home batteries, and is very low -- and relatively cheap," he said.

Transcranial random noise stimulation is considered to be harmless, and several studies haven't mentioned any adverse effects in those who have been zapped. Researchers are interested in one possible positive effect, though: changes in how the brain processes things.

"The brain is working on electricity, and in some cases poor behavior and cognitive [thinking] abilities appear when there's less activation of regions that are otherwise active," Cohen Kadosh said. "We
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