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Published online 8 February 2007 | Nature | doi:10.1038/news070205-13
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I know what you're thinking...
A brainscan can tell whether you're about to add or subtract two numbers.
Just by looking at the pattern of firing in your brain, neuroscientists can tell whether you are thinking about moving your hand to the left or to the right. They can tell if you have seen something you didn't even know you saw, and, now it seems, they can tell which mathematical operation you secretly have in mind.
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