Researchers at the Center for Sensorimotor Neural Engineering are working on a way you can truly have SoC on the brain, partnering with ARM to develop chips which can be implanted in the brain.  The goal is not to grant you a neural interface nor add a couple of petabytes to your long term memory but to help treat people suffering from paralysis due to stroke or other damage to the brain.  There is the small problem of heat, brain tissue will be much more susceptible to damage from implanted devices than an organ in the torso; a pacemaker has space in which to dissipate excess heat.  We are still a long way off but you can read up on the current state of the research by following the links at The Inquirer.

"CHIP GIANT ARM is teaming up with US researchers on a project develop human brain implants aimed at helping paralysed patients as well as stroke and Alzheimer's patients."

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