""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.
"It's proof of concept that we can record information from the brain, analyse it in a way similar to the biological network, and return it to the brain," says Mintz, who presented the work this month at the Strategies for Engineered Negligible Senescence meeting in Cambridge, UK.
One of the functions of the cerebellum is to help coordinate and time movements. This, and the fact that it has a relatively straightforward neuronal architecture, make it a good region of the brain to synthesise. "We know its anatomy and some of its behaviours almost perfectly," says Mintz. The team analysed brainstem signals feeding into a real cerebellum and the output it generated in response. They then used this information to generate a synthetic version on a chip that sits outside the skull and is wired into the brain using electrodes.
To test the chip, they anaesthetised a rat and disabled its cerebellum before hooking up their synthetic version. They then tried to teach the anaesthetised animal a conditioned motor reflex - a blink - by combining an auditory tone with a puff of air on the eye, until the animal blinked on hearing the tone alone. They first tried this without the chip connected, and found the rat was unable to learn the motor reflex. But once the artificial cerebellum was connected, the rat behaved as a normal animal would, learning to connect the sound with the need to blink.""
http://www.newscientist.com/article/mg21128315.700-rat-cyborg-gets-digital-cerebellum.html
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