Primed for numbers. Random pulses of electrical current can accelerate math learning.
Credit: Albert Snowball
Posted on 05/19/2013 5:14:27 PM PDT by neverdem
If you are one of the 20% of healthy adults who struggle with basic arithmetic, simple tasks like splitting the dinner bill can be excruciating. Now, a new study suggests that a gentle, painless electrical current applied to the brain can boost math performance for up to 6 months. Researchers don't fully understand how it works, however, and there could be side effects.
The idea of using electrical current to alter brain activity is nothing new—electroshock therapy, which induces seizures for therapeutic effect, is probably the best known and most dramatic example. In recent years, however, a slew of studies has shown that much milder electrical stimulation applied to targeted regions of the brain can dramatically accelerate learning in a wide range of tasks, from marksmanship to speech rehabilitation after stroke.
In 2010, cognitive neuroscientist Roi Cohen Kadosh of the University of Oxford in the United Kingdom showed that, when combined with training, electrical brain stimulation can make people better at very basic numerical tasks, such as judging which of two quantities is larger. However, it wasn't clear how those basic numerical skills would translate to real-world math ability.
To answer that question, Cohen Kadosh recruited 25 volunteers to practice math while receiving either real or "sham" brain stimulation. Two sponge-covered electrodes, fixed to either side of the forehead with a stretchy athletic band, targeted an area of the prefrontal cortex considered key to arithmetic processing, says Jacqueline Thompson, a Ph.D. student in Cohen Kadosh's lab and a co-author on the study. The electrical current slowly ramped up to about 1 milliamp—a tiny fraction of the voltage of an AA battery—then randomly fluctuated between high and low values. For the sham group, the researchers simulated the initial sensation of the increase by releasing a small amount of current, then turned it off.
For roughly 20 minutes per day over 5 days, the participants memorized arbitrary mathematical "facts," such as 4#10 = 23, then performed a more sophisticated task requiring multiple steps of arithmetic, also based on memorized symbols. A squiggle, for example, might mean "add 2," or "subtract 1." This is the first time that brain stimulation has been applied to improving such complex math skills, says neuroethicist Peter Reiner of the University of British Columbia, Vancouver, in Canada, who wasn't involved in the research.
The researchers also used a brain imaging technique called near-infrared spectroscopy to measure how efficiently the participants' brains were working as they performed the tasks.
Although the two groups performed at the same level on the first day, over the next 4 days people receiving brain stimulation along with training learned to do the tasks two to five times faster than people receiving a sham treatment, the authors report online today in Current Biology. Six months later, the researchers called the participants back and found that people who had received brain stimulation were still roughly 30% faster at the same types of mathematical challenges. The targeted brain region also showed more efficient activity, Thompson says.
The fact that only participants who received electrical stimulation and practiced math showed lasting physiological changes in their brains suggests that experience is required to seal in the effects of stimulation, says Michael Weisend, a neuroscientist at the Mind Research Network in Albuquerque, New Mexico, who wasn't involved with the study. That's valuable information for people who hope to get benefits from stimulation alone, he says. "It's not going to be a magic bullet."
Although it's not clear how the technique works, Thompson says, one hypothesis is that the current helps synchronize neuron firing, enabling the brain to work more efficiently. Scientists also don't know if negative or unintended effects might result. Although no side effects of brain stimulation have yet been reported, "it's impossible to say with any certainty" that there aren't any, Thompson says.
"Math is only one of dozens of skills in which this could be used," Reiner says, adding that it's "not unreasonable" to imagine that this and similar stimulation techniques could replace the use of pills for cognitive enhancement.
In the future, the researchers hope to include groups that often struggle with math, such as people with neurodegenerative disorders and a condition called developmental dyscalculia. As long as further testing shows that the technique is safe and effective, children in schools could also receive brain stimulation along with their lessons, Thompson says. But there's "a long way to go," before the method is ready for schools, she says. In the meantime, she adds, "We strongly caution you not to try this at home, no matter how tempted you may be to slap a battery on your kid's head."
I once had a B.F.Skinner type flash (9th grade) when I completely understood all of the arithmetic,algebra,math,trigonometry,calculus after having struggled with those concepts previously. I’ve made my living since exploiting those skills.
Is it covered by the abomination known as 0bamacare?
My math skills are terrible but now I am too old to care.
What could possibly go wrong?
“Trouble With Math? Maybe You Should Get Your Brain Zapped”
Cool! Is there an app for that?
Same thing happened with me back in HS. I sucked at math, yet parents were both accountants. Then it just happened, I just called it an epiphany where every math equation looked easy. Add to the mystery was that the HS bullies who beat up other kids for their lunch money were math geniuses..
It was an almost orgasmic moment for me, I’ll never forget it...and that was back in the early ‘60’s.
"Learn math, or we're gonna shock the livin' sh** outta you!"
But how do you KNOW you’re too old to care?
:)
A six month boost? Reminds me of “Flowers for Algernon.”
A six month boost? Reminds me of “Flowers for Algernon.”
I have been zapped a few times playing with electronic stuff. Leaving a auto coil laying can be fun with friends. Maybe this is why many guys do better in math than girls. Girls are too smart to pick up the coil.
Sarah Hall Ingram says she’s not good at math ...
Sounds like a Monty Python skit!
If small electrical currents increase your ability to grasp technical stuff, this guy needs to grab his ignition coil. If I introduced him to Eli the Iceman, he'd probably eat him.
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.
