Replacement arm, good as new

Scientists have had a string of remarkable successes lately, taking signals from the brains of monkeys and men, and using them to move mechanical arms.

Darpa, the Pentagon's blue-sky research division, now wants to ratchet that work up about ten notches, by developing a "neurally controlled artificial limb that will restore full motor and sensory capability to upper extremity amputee patients. This revolutionary prosthesis will be controlled, feel, look and perform like the native limb."

So, basically, what Luke Skywalker gets in Empire Strikes Back, after Darth chops off his hand. Except, researchers won't have a long, long time to get this limb ready. Darpa wants the robo-arm stat -- in four years or less.

The limb would have to be wired directly into the peripheral nervous system, instead of the brain-controlled arms being demonstrated today, Darpa tells researchers interested in working on this "Revolutionizing Prosthetics" project. Under agency guidelines, the arm will need enough finesse to pick up a raisin or to write in longhand. It needs to be sensitive enough for the wearer to handle day-to-day tasks in the dark. And the limb will have to be strong enough to lift 60 pounds at a time.

These are beyond ambitious goals, and even the even the big thinkers at Darpa acknowledge it. Breakthrough research in "neural control, sensory input, advanced mechanics and actuators, and prosthesis design and integration" will all be needed, the agency says in a call for proposals. Neuroscientists, roboticists, engineers, occupational therapists, and surgeons in the neural, orthopedic, reconstructive subspecialties will have to chip in.

"Revolutionizing Prosthetics" is so far-out that Darpa is taking the unusual step of hedging its bets, and running a parallel, more down-to-earth program.

VIDEO: Brain Age Workshop
Dr. Eric Braverman, Director of The Place for Achieving Total Health (PATH Medical), Chairs the Brain Age Workshop taking place Dec. 9, 2009. Held in conjunction with the Winter Session of the 17th Annual World Congress on Anti-Aging Medicine & Regenerative Biomedical Technologies. The Brain Age Workshop features presentations on Brain Mind Assessment via Neuropsychological Analysis, Movement Deficiency Syndrome, Hormones and the Brain, Nootropic Drug Mechanisms, and Traumatic Brain Injury. View this video to learn about Dr. Braverman’s brain-based model of aging and age modulation.