yeah, I've been thinking about this for a while. You can do a kind of tomographic reconstruction of neural impulses in the spinal column. By the same token you

yeah, I've been thinking about this for a while. You can do a kind of tomographic reconstruction of neural impulses in the spinal column. By the same token you can induce electric fields within the spinal column. You need an incredibly high density of electrodes arranged around the spinal column. Then you need to construct in real time an image of the internal spinal column down to the level of fibre bundles, in real time. Then when you want to stimulate something you can apply the correct voltages to the huge numbers of electrodes and induce firing in the target neuron bundles. Oh and you need to understand how neurons relay information - not actually a solved problem. It's all possible. Just good luck getting this to work before the year 2100. But in the back of my mind I have a plan involving flex pcbs...