Researchers in Germany used electrodes to observe peoples' brain activity while solving math problems.
. Since they were undergoing treatment for epilepsy that cannot be managed using medication, the electrodes would be able to help identify the part of the brain causing their seizures in order to possibly have it removed.
Each individual would complete a series of simple math problems using addition or subtraction. Some of the problems were written with numbers and symbols and some were written with words . While the subjects completed the problems, their neuron activity was recorded using the electrodes. The researchers found that a completely different set of neurons would fire up during addition versus subtraction and that it did not matter if the problem was expressed in symbols or words.
In order to verify that the varying levels of activity actually corresponded to solving different math problems, the researchers processed all the data with a self-learning computer program. First, they trained the system by inputting the neuron activity for each math problem and whether the subject was doing addition or subtraction.
“This study marks an important step towards a better understanding of one of our most important symbolic abilities, namely calculating with numbers,” Florian Mormann, a professor of cognitive and clinical neurophysiology at the University Hospital Bonn and one of the authors of the study, said in
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