Researchers say that by applying electrical current to the brain they can enhance mathematical performance for up to 6 months - and there is no impact on other cognitive functions.
Aside from being a new way for kids to cheat on their SATs, the work may lead to treatments for the percentage of the population with moderate to severe numerical disabilities like dyscalculia ('math dyslexia') and for those who lose their skill with numbers as a result of stroke or degenerative disease.
The researchers used a method of brain stimulation known as transcranial direct current stimulation (tDCS). TDCS is a noninvasive technique in which a weak current is applied to the brain constantly over time to enhance or reduce the activity of neurons and it has gotten attention in the last decade for its potential to improve various functions in people with neurological deficits, like those who have suffered a stroke.
In the new study, the researchers applied tDCS specifically to the parietal lobe, a portion of the brain that is crucial for numerical understanding. The study participants had normal mathematical abilities but were asked to learn a series of artificial numbers—symbols that they had never seen before that they were told represented numbers—while they received the noninvasive brain stimulation.
The researchers then tested participants' ability to automatically process the relationship of those artificial numbers to one another and to map them correctly in space using standard testing methods for numerical competence.
The results of the tests showed that the brain stimulation improved study participants' ability to learn the new numbers. and that those improvements lasted 6 months post training.
"I am certainly not advising people to go around giving themselves electric shocks, but we are extremely excited by the potential of our findings," said Roi Cohen Kadosh of the University of Oxford. "We've shown before that we can temporarily induce dyscalculia [with another method of brain stimulation], and now it seems we might also be able to make someone better at maths. Electrical stimulation will most likely not turn you into Albert Einstein, but if we're successful, it might be able to help some people to cope better with maths."
Now that their results say tDCS treatment can improve number processing in people with normal mathematical ability, the researchers plan to test its use in those with severe numerical disabilities.
If it works, that could have important consequences, Cohen Kadosh said, as people with severe numerical disabilities often cannot manage basic tasks like understanding food labels or counting change in a supermarket. Poor numerical ability has also been linked to unemployment and low income, depression, low self-esteem, and other problems, he said.
Citation: Roi Cohen Kadosh, Sonja Soskic, Teresa Iuculano, Ryota Kanai, and Vincent Walsh, 'Modulating Neuronal Activity Produces Specific and Long-Lasting Changes in Numerical Competence', Current Biology November 4 2010 DOI: 10.1016/j.cub.2010.10.007
- PHYSICAL SCIENCES
- EARTH SCIENCES
- LIFE SCIENCES
- SOCIAL SCIENCES
Subscribe to the newsletter
Stay in touch with the scientific world!
Know Science And Want To Write?
- Why An Extra Planet Can't Be Hidden Behind The Sun Or Above The South Pole
- The Daily Physics Problem - 2
- Lichen: Apparently Happy Couple Really A Threesome
- The Daily Physics Problem - 1
- The Daily Physics Problem - 3
- US Could Feed Twice As Many People - If Only Elites Eat Meat
- People Estimate Their Own Abilities Based On Others' Performance
- "Based on credible assumptions about the system, a possible theory is that some not-very-good physicist..."
- "Well, if the simple enough comments above are already too hard for you and a mile-long, I am sure..."
- "You are so clearly delusional about what an experimental physicist should know, that I don't feel..."
- "I do this mainly because people get so scared about the idea, and I had one person post to the..."
- "Dear Tommaso, your order to consider all thinkable things is even more wrong and *especially* wrong..."
- Conservationists should be worried about Pokémon Go
- That time the Mafia almost fixed the Democratic National Convention
- The history of attitudes toward public breastfeeding
- Unusual new zoantharian species is the first described solitary species in over 100 years
- Scientists develop painless and inexpensive microneedle system to monitor drugs