Recent technological advances have revolutionized the world of support and medical tools, and prosthetic legs are no exception.
We have come a long way from the strict, purely cosmetic prosthetics of the past. Today we see the rise of softer, more realistic designs, many incorporate robotic components that greatly expand their functionality.
Despite these exciting developments, major challenges remain. How do you make the hands and feet of these robots more intuitive to the user control?
Soft prosthetics designed for more intuitive control. (Science and Robotics)
Control Issues: Barriers to Real-World Use
Think about it – a very advanced prosthetic man is just as good as the user's ability to control it. If the control system is unstable or difficult to learn, it limits the effectiveness of the prosthesis and ultimately affects the user's quality of life. The limbs of most commercially available robots still struggle with this problem.
Soft prosthetics designed for more intuitive control. (Science and Robotics)
Soft Robot Armband gives natural control to prosthetic hand users
Breakthroughs from IIT and Imperial College London
Currently, researchers from the Italian Institute of Technology (IIT) and Imperial College London have announced promising solutions for new soft prosthetics designed for more intuitive control. Their work, published in Science Robotics, introduces a new control approach that combines the natural adjustment patterns of the fingers with deciphering motor nuclear activity in the spine.
Soft prosthetics designed for more intuitive control. (Science and Robotics)
New prosthetics restore natural movement through neural connections
Deciphering the natural movements of the body
So, how does it work? Let's break it down. When we perform daily tasks, our fingers move in a tuned pattern called “posture synergy.” These synergies are fundamental to understanding and manipulating objects. The team led by Antonio Bicz and Dario Farina have developed a method to integrate these postural synergies with the analysis of electrical signals from the nervous system. By decoding the activity of spinal motor neurons (neurons that control muscle movements), you can predict the movements of the hand that the user intends to do. This information is used to control the prosthetics.
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Soft prosthetics designed for more intuitive control. (Science and Robotics)
Groundbreaking prosthetic fingers revolutionize the lives of amputees
Soft material, smart design
The hand itself is an impressive engineering feat, combining soft materials for skin, tendons and ligaments with hard materials for “bone.” According to Bicchi, artificial bones “roll on top of each other rather than normally rotating pins, such as robotic hands.” This, along with the placement of the tendons, allows the hand to adapt to the shape of the object, mimics the natural and intelligent gripping behavior of the human hand. One of the most exciting features of this new prosthetic hand is its ability to operate it with the hand. This means that the user can not only grasp the object, but also adjust the grip and move the object inside the hand.
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Soft prosthetics designed for more intuitive control. (Science and Robotics)
Promising results from the first exam
Researchers tested their creations in both healthy participants and individuals with prosthetic needs. The results are encouraging and show that the user can perform complex movements with the hand and manipulate the object with more accuracy and naturalness compared to other prosthetic hands. This test combined the synergistic effects of nerve and posturality to allow for accurate and natural control of the coordinated multidigit action, achieving 90% or more of a continuous mechanical manifold, with target hit rates for specific hand postures being higher in neural carpool compared to muscle synergism.
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Soft prosthetics designed for more intuitive control. (Science and Robotics)
The future of prosthetics looks softer and smarter
This innovative soft prosthetic hand represents a major advance in this field. The control approach and design principles developed by the IIT and Imperial College London teams can pave the way for more advanced prosthetic limbs in the future. Although further improvements and clinical trials are needed, this technology has great potential to improve the lives of individuals with limb loss.
Soft prosthetics designed for more intuitive control. (Science and Robotics)
Important takeouts for your cart
This study highlights the importance of mimicking the natural mechanisms of the body when designing prosthetics. By combining soft robotics with advanced neural decoding, scientists create prosthetics that are not only functional, but also intuitive and natural use. This can actually revolutionize the field, helping users regain lost abilities and improve their quality of life.
If you or someone you know can benefit from this type of technology, will it allow for the specific tasks or activities they can do? Write us and let us know cyberguy.com/contact
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