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Mind-controlled prosthetic arm: new procedure allows patients to use advanced robotic arm
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Originally published on 10 March, 2015
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Three Austrian men with brachial plexus injuries have become the first people in the world to receive a mind-controlled prosthetic arm based on a new technique known as “bionic reconstruction.”
Researchers from the Medical University of Vienna in Austria and the University Medical Center Gottingen in Germany developed the technique that combines selective nerve and muscle transfers, elective amputation and an advanced robotic prosthesis.
Brachial plexus injuries, often the result of trauma from high-speed collisions, disconnects the hand from the brain.
Researchers were able to record and use the signal from slight contractions in the muscles when the patients move their shoulder, elbow and forearm normally to open the bionic hand. To close the bionic hand, researchers transplanted a muscle from the thigh into the forearm to amplify a secondary nerve signal. A combination of these two signals allows the patient to rotate the wrist.
Patients undergo cognitive training for nine months to activate the muscles, then learning to use the electrical signals to control a virtual hand. Once they master the cognitive training, they start training with a prosthetic hand attached to their non-functioning hand. To complete the bionic reconstruction, patients have to amputate the existing hand for the prosthetic to connect with the arm.
Three months after the amputation, all three men were able to use their robotic arm to complete tasks they were not able to complete before the procedure.
The researchers plan to apply the technique to patients with a functionless hand or leg caused by different injuries. They are also examining ways to decode muscular signals to achieve more intuitive control of the prosthesis.
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Three Austrian men with brachial plexus injuries have become the first people in the world to receive a mind-controlled prosthetic arm based on a new technique known as “bionic reconstruction.”
Researchers from the Medical University of Vienna in Austria and the University Medical Center Gottingen in Germany developed the technique that combines selective nerve and muscle transfers, elective amputation and an advanced robotic prosthesis.
Brachial plexus injuries, often the result of trauma from high-speed collisions, disconnects the hand from the brain.
Researchers were able to record and use the signal from slight contractions in the muscles when the patients move their shoulder, elbow and forearm normally to open the bionic hand. To close the bionic hand, researchers transplanted a muscle from the thigh into the forearm to amplify a secondary nerve signal. A combination of these two signals allows the patient to rotate the wrist.
Patients undergo cognitive training for nine months to activate the muscles, then learning to use the electrical signals to control a virtual hand. Once they master the cognitive training, they start training with a prosthetic hand attached to their non-functioning hand. To complete the bionic reconstruction, patients have to amputate the existing hand for the prosthetic to connect with the arm.
Three months after the amputation, all three men were able to use their robotic arm to complete tasks they were not able to complete before the procedure.
The researchers plan to apply the technique to patients with a functionless hand or leg caused by different injuries. They are also examining ways to decode muscular signals to achieve more intuitive control of the prosthesis.
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Next Media Animation’s News Direct service provides daily, high-quality, informative 3D animated news graphics that fill in for missing footage and help viewers understand breaking news stories or in-depth features on science, technology, and health.
To subscribe to News Direct or for more info, please visit:
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