The sensor for the electronic skin is connected to the wearer's prosthesis by an electrode placed on the skin, and in a similar manner to the actual neurotransmission signal. According to different pulse modes delivered by the electronic device, the electronic skin can transmit a series of feelings from light touch to pain. The researchers said: "Through this tactile feedback, we can provide an amputee with a real feeling." This is really very important, because it makes us closer to creating a true upper limb prosthesis.
Researchers have created an electronic skin that can sense pain and sensation. The prosthesis that encloses this electronic skin can help amputees avoid injury. This electronic skin is a thin layer made of rubber and fabric that covers the tips of the prosthetic hand and generates electrical impulses.
When electronic skin comes into contact with an object, these tiny pulses stimulate the nerves in the prosthesis to simulate a real touch. The research team has conducted an electronic skin test on an anonymous amputee. The tester said the experience was like an empty shell once again gaining life.
Perceiving pain is crucial for a full-featured body because it helps us to avoid danger and protect our body. Pain is certainly annoying, but it is also necessary. With this electronic skin, the protective touch that the prosthesis once lacked can now be experienced by amputees.
The researchers tested an electronic skin prototype on the anonymous amputee. The tester wore this electronic skin to grab a different object. The research team also introduced automatic pain responses, meaning that the hand would throw away objects that were too sharp before it received instructions from the brain. The participant described the feeling of wearing this electronic skin: "After many years, I felt my hand again, as if an empty shell was once again full of life."
This study shows that it is possible for amputees who use prostheses to recover a series of tactile sensations. The research team plans to develop a device in the future that will allow people to obtain a series of more complex tactile sensations. Osborn said: "It's really important that people get all the touch, and certainly not just the pain, but the texture and temperature. We plan to explore ways to give more sensations to amputees in the future."
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