"Twelve years ago a car wreck took away Nathan Copelands ability to control his hands or sense what his fingers were touching. A few months ago researchers at the University of Pittsburgh and the University of Pittsburgh Medical Center gave Copeland a new way to reach out and feel the world around him. Its a mindcontrolled robotic arm that has pressure sensors in each fingertip that send signals directly to Copelands brain. The scientists published httpstm.sciencemag.orgcontentearlyscitranslmed.aaf details of their work online Thursday in the journal Science Translational Medicine. Its a really weird sensation Copeland now  says in a video made shortly after he first tried the system. Sometimes it feels kind of like electrical and sometimes its more of a pressure. But he also describes many of the sensations coming from his robotic hand as natural. When Copeland touches an object with the robotic hand he can tell which finger the sensation is coming from and whether an object feels hard or soft says Robert Gaunt http_.html a bioengineer and assistant professor in the Department of Physical Medicine  Rehabilitation at the University of Pittsburgh. But were really not at the point where we could say get him to feel the difference between silk and burlap Gaunt says. The success represents an advance that is absolutely critical in terms of making prosthetics useful says Mike McLoughlin httpjhmvhi.jhu.edupeoplemichaelpmcloughlin an engineer at the Johns Hopkins University Applied Physics Laboratory. McLoughlin is part of a team at Hopkins that developed the Modular Prosthetic Limb http that Copeland is using. The research at both Hopkins and in Pittsburgh is supported by the governments Defense Advanced Research Projects Agency. For several years now people have been able to control robotic arms using thoughts alone. But they have relied entirely on vision to know whether the arm is going in the right direction or grasping an object with the proper amount of force. That makes it very challenging to perform simple tasks like grasping a foam coffee cup without crushing it McLoughlin says. Sensing Touch Watch a blindfolded Nathan Copeland accurately sense which fingers being touched.  Credit UPMCPitt Health Sciences Without sensory feedback somebody would have to actually have to look at the prosthetic look at the cup start to close the hand and visually see the cup is starting to deform he says. Restoring Copelands sense of touch was a painstaking process but the Pittsburgh team knew it was possible. His hand has been disconnected from his brain because of his spinal cord injury Gaunt says. But the brain hasnt lost its ability to feel. So the team began looking for a way to send touch sensations directly to Copelands brain. The first step was to monitor his brain activity using a technique called magnetoencephalography httpmegcommunity.orgwhatismeg. We were able to see the parts of his brain that became active when he was watching videos of a hand being touched Gaunt says. Next the researchers placed tiny electrodes in Copelands brain that could stimulate the areas corresponding to each finger. Then they waited for the brain to heal as it adjusted to the presence of the electrodes. It was several weeks before the team was able to send the first tiny pulse of electricity to Copelands brain. When it finally happened he just very calmly said Yep I felt it on my index finger  Gaunt recalls. But in the background I was breathing a sigh of relief and other people were cheering. Of course mindcontrolled robots are still years away from consumer applications McLoughlin says. At the moment they are still too expensive too bulky and too finicky to be used outside a laboratory setting. And theres no good way to control them without implanting electrodes in the brain. Still the ability to receive touch sensation from a robotic arm has the potential to help not only thousands of people who are paralyzed but also people with a wide range of physical disabilities McLoughlin says. For example robots that provide sensory feedback could eventually help a disabled person cook a meal or clean up things at home. Were on the verge of something here thats going to transform lives he says."