artificial bionic finger restores the sense of touch to an amputee, a world first – Paginemediche
08/03/2016 Neurosurgery Orthopaedic Surgery Reuters Health
Roma, 8 Tues. (AdnKronos Health) – No longer just science fiction bionic implants with sensitive fingers applied to Luke Skywalker in Star Wars. The path to new and enhanced bionic implants, able to restore the sense of touch in real time, speeds thanks to a Swiss-Italian research. For the first time in the world a person amputated, the Dane Dennis Sørensen Aabo, acknowledged in the texture of some objects details using a bionic finger connected to electrodes that have been implanted on his arm, above the stump, in surgical manner. Sørensen has distinguished rough surfaces than on smooth ones in 96% of tests.
The new exceptional result was achieved by Italian scientists of the Institute of BioRobotics the Sant’Anna School of Pisa and dell ‘ École Polytechnique Fédérale de Lausanne in Switzerland, and has been described in the article published today in the scientific journal ‘eLife’, directed by Nobel laureate Randy Schekman. Looking collaborated University of Pisa, IRCCS San Raffaele Pisana, Catholic University of the Sacred Heart and the University Campus Bio-Medico of Rome. The technology to send sophisticated tactile information was developed by Silvestro Micera and his research group at Ecole Polytechnique Federale de Lausanne, and at the Institute of BioRobotics the Scuola Superiore Sant’Anna, a researcher with Oddo Calogero and his team.
the study showed that, for the first time ever, an amputee has been able to perceive smooth or rough surfaces in real time , with an artificial finger connected to electrodes inserted in surgical way in the nerves of the arm. Even the nerves of amputated people can not be stimulated to perceive the roughness, without the need for surgery: therefore the research on the touch bionic and on to be used in prostheses technology can be developed in safety even in persons who own the limb.
“I could feel the stimulation almost like I could feel with my hand – Sørensen is confident about the artificial finger connected to its stump – and still feel my missing hand, it’s like I clenched fist. with artificial finger I felt the sensations on the tip of the index finger of my phantom hand. ” The nerves in the arm Sørensen were connected to a artificial finger with sensors. A machine controlled the movement of the finger on different plastic surfaces, on which were made by the 3D printing lines. The lines between their neighbors have a smoother texture than those between their most distant. During the movements of the artificial finger on plastic textures, generating electrical signals sensors. These signals were transformed into a sequence of electrical pulses , which mimicked the language of the nervous system and then sent to the nerves. Today is the result of years of research: in a previous study, the Sørensen plants were connected to a prosthetic hand sensorized that enabled him to recognize the form and smoothness of the objects. In this new research on the texture, the bionic finger gets a superior tactile resolution level.
The same experiment to evaluate the texture of the tactile perception was also done with persons not amputated, without the need for surgical interventions. The tactile information has been sent by microneurografici thin needles that have been temporarily stored, through the skin, in the median nerve of the arm. The amputees were not capable of distinguishing the roughness of the surfaces in 77% of the tests. But this information to the touch, which comes from the bionic finger, is really similar to the feeling of touch coming from a real finger? The scientists tested this hypothesis by comparing the brain wave activity of the non-amputated subjects , generated both from artificial finger is from the natural finger. Analysis undertaken by electroencephalography have found that regions activated in the brain were similar.
The research also confirms that microneurografici needles carry information on textures in a comparable manner to the implanted electrodes, Sørensen in this case, providing scientists with new opportunities to accelerate research on touch in prosthetics.
“this study combines basic science and applied engineering, and provides additional evidence of the contributions that research in neuroprosthetics can give neuroscientific debate, specifically on the neural mechanisms of the sense of human touch “, he underlines Oddo, first author of the publication. “From the bionic prostheses – comments – will also be translated into other applications, such as artificial touch in robotics for surgery, Relief and for the manufacturing sector.”
“It is exciting to have demonstrated that we can give back the feeling of roughness by stimulating the nerves of arm, damaged nervous systems is that intact “, said Stanisa Raspopovic, investigator of the Ecole Polytechnique Federale de Lausanne and the Scuola Superiore Sant’Anna, and co-first author of study. “The research – he concludes – is finally shifting the main focus from the only question of what the electrodes used to using them optimally, to get natural feelings through the prosthetics.”
Mar 8th 2016, 23:12, by Stimpson
Roma, 8 Tues. (AdnKronos Health) – No longer just science fiction bionic implants with sensitive fingers applied to Luke Skywalker in Star Wars. The path to new and enhanced bionic implants, able to restore the sense of touch in real time, speeds thanks to a Swiss-Italian research. For the first time in the world a person amputated, the Dane Dennis Sørensen Aabo, acknowledged in the texture of some objects details using a bionic finger connected to electrodes that have been implanted on his arm, above the stump, in surgical manner. Sørensen has distinguished rough surfaces than on smooth ones in 96% of tests.
The new exceptional result was achieved by Italian scientists of the Institute of BioRobotics the Sant’Anna School of Pisa and dell ‘ École Polytechnique Fédérale de Lausanne in Switzerland, and has been described in the article published today in the scientific journal ‘eLife’, directed by Nobel laureate Randy Schekman. Looking collaborated University of Pisa, IRCCS San Raffaele Pisana, Catholic University of the Sacred Heart and the University Campus Bio-Medico of Rome. The technology to send sophisticated tactile information was developed by Silvestro Micera and his research group at Ecole Polytechnique Federale de Lausanne, and at the Institute of BioRobotics the Scuola Superiore Sant’Anna, a researcher with Oddo Calogero and his team.
the study showed that, for the first time ever, an amputee has been able to perceive smooth or rough surfaces in real time , with an artificial finger connected to electrodes inserted in surgical way in the nerves of the arm. Even the nerves of amputated people can not be stimulated to perceive the roughness, without the need for surgery: therefore the research on the touch bionic and on to be used in prostheses technology can be developed in safety even in persons who own the limb.
“I could feel the stimulation almost like I could feel with my hand – Sørensen is confident about the artificial finger connected to its stump – and still feel my missing hand, it’s like I clenched fist. with artificial finger I felt the sensations on the tip of the index finger of my phantom hand. ” The nerves in the arm Sørensen were connected to a artificial finger with sensors. A machine controlled the movement of the finger on different plastic surfaces, on which were made by the 3D printing lines. The lines between their neighbors have a smoother texture than those between their most distant. During the movements of the artificial finger on plastic textures, generating electrical signals sensors. These signals were transformed into a sequence of electrical pulses , which mimicked the language of the nervous system and then sent to the nerves. Today is the result of years of research: in a previous study, the Sørensen plants were connected to a prosthetic hand sensorized that enabled him to recognize the form and smoothness of the objects. In this new research on the texture, the bionic finger gets a superior tactile resolution level.
The same experiment to evaluate the texture of the tactile perception was also done with persons not amputated, without the need for surgical interventions. The tactile information has been sent by microneurografici thin needles that have been temporarily stored, through the skin, in the median nerve of the arm. The amputees were not capable of distinguishing the roughness of the surfaces in 77% of the tests. But this information to the touch, which comes from the bionic finger, is really similar to the feeling of touch coming from a real finger? The scientists tested this hypothesis by comparing the brain wave activity of the non-amputated subjects , generated both from artificial finger is from the natural finger. Analysis undertaken by electroencephalography have found that regions activated in the brain were similar.
The research also confirms that microneurografici needles carry information on textures in a comparable manner to the implanted electrodes, Sørensen in this case, providing scientists with new opportunities to accelerate research on touch in prosthetics.
“this study combines basic science and applied engineering, and provides additional evidence of the contributions that research in neuroprosthetics can give neuroscientific debate, specifically on the neural mechanisms of the sense of human touch “, he underlines Oddo, first author of the publication. “From the bionic prostheses – comments – will also be translated into other applications, such as artificial touch in robotics for surgery, Relief and for the manufacturing sector.”
“It is exciting to have demonstrated that we can give back the feeling of roughness by stimulating the nerves of arm, damaged nervous systems is that intact “, said Stanisa Raspopovic, investigator of the Ecole Polytechnique Federale de Lausanne and the Scuola Superiore Sant’Anna, and co-first author of study. “The research – he concludes – is finally shifting the main focus from the only question of what the electrodes used to using them optimally, to get natural feelings through the prosthetics.”
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