A Fitbit for Your Brain Is Around the Corner

Every time you blink, think or move, your brain generates electricity as individual neurons in the skull transmit information needed to make it happen. If we could detect the electrical signals produced by individual neurons, we could, in theory, read a person’s mind. Amazing. And exceedingly difficult. The amount of electricity generated by an individual neuron transmitting a single piece of information is incredibly tiny. The brain, all 100 billion neurons of it, produces en masse about 20 watts—barely enough to power an incandescent light bulb. For decades, the best neuroscientists could do was use electroencephalography, or EEG, to detect the signals that characterized different stages of sleep, say, or the in-brain power surges brought about by epileptic seizures. And that wasn’t easy. They had to shave people’s heads, put them…

Link to Full Article: A Fitbit for Your Brain Is Around the Corner

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