If you haven't heard of brain-computer interfaces before, this Wikipedia article is a good place to start. The concept is connecting human brains to computers. So, you could think about something and effectively google it and know the answer. This sort of technology isn't as crazy as you might think. Recently,
Matt Nagle, a quadraplegic paralyzed from the neck down was implanted with probes into his brain through which he was able to manipulate simple things by thinking about them, such as working a remote control, reading email and opening and closing a prosthetic hand. Deafness has been cured in some 80,000 people today through cochlear implants, where audio signals are processed and fed directly into the auditory nerve.

So, today there are already real-world means of getting output from a human brain into a computer, and getting output from a computer back into the brain. Now, it's just a matter of increasing the bandwidth.

Link