Photo: Yoshikazu Tsuno/AFP/Getty Images
An engineer at Hitachi shows off a portable brain-machine interface that uses an optical sensor to detect changes in blood flow in the prefrontal cortex. Researchers at the electronics firm and at Japan’s Tohoku University developed the neuroimaging device with the aim of giving people the ability to control electronic gadgets with their thoughts. The researchers expect a commercial version to be available within five years.
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