Volunteers performed the best when an anode was attached above part of the brain associated with problem solving and spontaneity
famously took the melody for “Yesterday” from a dream, while Thomas Edison argued that his best ideas came from hard work. Others have looked to coffee, drugs or love. But what if creativity could be turned on with a flick of a switch?
Elisabeth Hertenstein at the University of Freiburg, Germany, and her colleagues have done just that, using a technology known as transcranial direct current stimulation . Their insights could help creatives to stay at the top of their game.DCS uses electrodes attached to the scalp to pass a tiny electrical current through the brain. Neuroscientists think the current makes the brain cells underneath the positive electrode work harder, while the negative electrode has the opposite effect and calms activity in nearby neurons. In a paper published insignificantly improved the performance of university students on three standard tests used by psychologists to measure aspects of creativity.
The first test is called the Alternate Uses Task and measures conceptual expansion: typically by asking people to think of as many possible uses for an everyday object, such as a brick or a paperclip. The second, the Compound Remote Associate Task, asks for words that work as common prefixes or suffixes for unrelated terms. So the answer to “age; mile; sand” is stone.
The student volunteers performed the best when the anode was attached above the right side of their inferior frontal gyrus —part of the frontal cortex and a region associated with problem solving and spontaneity—and the cathode fitted above the left side of the. The researchers were trying to increase activity in the right side and reduce activity in the left.
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