Thursday, 6 February 2014

Bionic hand allows patient with amputee to 'feel'

Dennis Aabo(the guy with the robotic hand) was able to feel what was in his hand via sensors connected to nerves in his upper arm

Scientists have created a bionic hand which allows the amputee to feel lifelike sensations from their fingers.
A Danish man received the hand, which was connected to nerves in his upper arm, following surgery in Italy.Dennis Aabo, who lost his left hand in a firework accident nearly a decade ago, said the hand was "amazing".In laboratory tests he was able to tell the shape and stiffness of objects he picked up, even when blindfolded.The details were published in the journal Science Translational Medicine.
An international team carried out the research project, which included robotics experts from Italy, Switzerland and Germany
"It is the first time that an amputee has had real-time touch sensation from a prosthetic device" said Prof Silvestro Micera from the Ecole Polytechnique Federale de Lausanne and Scuola Superiore Sant'Anna, Pisa.The scientific advance here was not the hand itself, but the electronics and software that enabled it to give sensory feedback to the brain.Micera and his team added sensors to the artificial hand which could detect and measure information about touch. Using computer algorithms, the scientists transformed the electrical signals they emitted into an impulse that sensory nerves could interpret.During an operation in Rome, four electrodes were implanted onto nerves in the patient's upper arm. These were connected to the artificial sensors in the fingers of the prosthetic hand, so allowing touch and pressure feedback to be sent direct to the brain.
Mr Aabo spent a month in the lab and confirmed to the press that the hand was amazing that he could feel and identify every shape and form. This i can say is science at its best.

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