Our spinal cord is a relatively small set of cables which are enough to transfer information for just about every movement of our body. We may not need to inter

Our spinal cord is a relatively small set of cables which are enough to transfer information for just about every movement of our body. We may not need to interface with the whole brain, just with the right cells to create a wide-enough communication avenue between our brains and computers. So , implants should be enough. As for the computational capacity, the brain is very intricate but, as everything in biology, rather suboptimal in terms of construction; we can simulate some of its primary functions like visual / audio recognition with just a small fraction of computational nodes.