Here is a piece in the latest NewScientist about so-called "rat cyborgs" you might find of interest. It turns out that neurocognitive implants may be closer than we thought. Here is an excerpt:
Now Matti Mintz of Tel Aviv University in Israel and his colleagues have created a synthetic cerebellum which can receive sensory inputs from the brainstem - a region that acts as a conduit for neuronal information from the rest of the body. Their device can interpret these inputs, and send a signal to a different region of the brainstem that prompts motor neurons to execute the appropriate movement.
This is as exciting as it is scary. We may be on the cusp of a brave new world indeed!