New research on controlling devices using only using thought seems to be holding our real promise. The field of brain machine interface devices has been around for a few years now, but it seems to be getting more mainstream with some really exciting advances in recent years. Now, they have gotten to point where a quadraplegic patient can now control some functions on a computer and a robotic hand with only thought :)
It works by recording from 50 to 150 neurons in the brain and interpreting their activity into control of a device. The interpretation is usually done by an intermediate artificial neural network or algorithm. For all of this to work, some amount of training is required both for the person and the neural network. As the technology is still premature, there is a long way to go in terms of development.
Who knows, one day we will get to point where anything can be controlled by plugging it into your brain-gate... look ma, no hands ;)
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