Bionic leg moves like a natural limb, without conscious thought
A groundbreaking bionic leg controlled by the brain and spinal cord, named AMI, improves speed, balance, and mobility for amputees. Lead researcher Hugh Herr emphasizes natural control and plans for further enhancements.
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A recent study published in Nature Medicine introduces a groundbreaking bionic leg controlled entirely by the brain and spinal cord, allowing users to move the prosthesis with their own thoughts and reflexes. The technology, tested on 14 participants with below-knee amputations, demonstrated significant improvements in speed, balance, and mobility compared to standard robotic legs. The system, called an agonist–antagonist myoneural interface (AMI), amplifies nerve signals from remaining muscles to enable natural movement patterns. Participants using the AMI walked 41% faster than those with conventional prostheses, showcasing the potential for a more intuitive and integrated bionic limb experience. The study's lead researcher, Hugh Herr, highlights the natural feel and control of the bionic limb, emphasizing the importance of neural interfaces in creating a seamless connection between the user and the prosthesis. Future developments aim to enhance the device's design for everyday use and expand its capabilities to accommodate more demanding activities.
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