Tech Explained: Brain-Computer Interface

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You may be familiar with the sci-fi trope of a computer that is linked to a human brain. But this technology is actually closer to reality than many realise. Technology that creates a brain-computer interface (BCI) already exists, and could soon allow people to control robots and computers with thought alone. So how does BCI work, and what can it do? The brain uses specialised cells called neurons to carry messages. Whenever we think, move, feel or remember something, small electrical signals are carried from neuron to neuron. These signals are generated by differences in electric potential carried by ions…

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