International Bionic Hand Prosthetics Quickly and Accurately Capture Neural Signals European Frontier Research Has New Breakthroughs

This article is published by 51 Prosthetics Nation

Can amputees’ “thoughts” finally be “understood” by prosthetic limbs?

51 Prosthetics News The editor saw the latest report in Vienna. A cutting-edge research from Europe is making "thought-controlled prostheses" from science fiction to reality. A joint team from the Medical University of Vienna and Imperial College London has successfully developed a new technology for accurately capturing nerve signals, laying a key foundation for the development of the next generation of bionic prostheses. This blockbuster result has been published in the top international journal "Nature Biomedical Engineering".

Core breakthrough: 40-channel microelectrodes + neural redirection, accurately "capture" movement intentions

Many people don’t know that the remaining nerves after amputation are actually still “active” but lack the connection to the limb. The core innovation of this research is to find a way to "activate" these nerves:

Surgical redirection of nerves: Through "targeted muscle innervation (TMR)" surgery, scientists reconnect the remaining nerve pathways after amputation to the patient's still intact muscles, allowing these muscles to become "relay stations" for nerve signals;

Implantation of high-precision electrodes: In these reconnected muscles, specially-made 40-channel microelectrodes are implanted - this miniature device can directly capture the activity of individual motor neurons like a "neural probe";

Decoding motor intentions: When participants "imagine" making movements with the bionic arm in their minds (such as extending fingers, bending wrists), the electrodes will accurately record the corresponding neural signal patterns, and reconstruct these complex intentions through mathematical models.

"For the first time, we have achieved direct measurement of the signal of a single motor neuron, and can clearly identify the neural instructions behind every subtle movement." Professor Oskar Aszmann, the leader of the research and an expert in bionic limb reconstruction at the Medical University of Vienna, said that this means that the prosthetic limb can finally "understand" the amputee's "thoughts" instead of simply executing preset actions.

Key finding: Complex motor intentions do not disappear after amputation!

The study's conclusion: Complex motor memories stored in the human nervous system remain intact even when a limb is amputated. By analyzing the recorded nerve signals, scientists found that the neural coding of these complex movements, from the fine grasp of the fingers to the flexible rotation of the wrist, has not been lost due to amputation and can be completely reconstructed through technical means.

"This is a key step in making the control of bionic prostheses more natural and intuitive." Oskar Aszmann emphasized that in the past, bionic prostheses mostly relied on muscle electrical signals to indirectly predict movement intentions, with limited accuracy. However, this time the technology directly connects to the neural core, which is equivalent to equipping the prostheses with a "neural brain." In the future, users will be able to operate as flexibly as they control native arms without deliberate training.

The future is promising: wireless implants + neurovisualization, can be the research direction of a new generation of prosthetics !

According to the research team’s plan, this technology will advance in two core directions:

Short-term: Develop a "biological screening system" to present the neural patterns of human movement through visualization technology to provide accurate data support for personalized bionic prosthetic limb customization;

Long-term: Develop wireless implantable devices so that neural signals can be transmitted directly to bionic hands or other auxiliary systems in real time, completely getting rid of the constraints of wires and realizing true "wireless mind control."

For upper-limb amputees, this technology would be of great significance if it can be implemented. Although domestic bionic prosthetics have made some progress, there is still room for improvement in terms of precise control and naturalness.

The editor of 51 Prosthetics News believes: We are basically still imitating others, but we have never surpassed them! The abandonment rate of hand prostheses has always been very high. Even if most users of hand prostheses are equipped with prostheses, they will basically stop using them after a period of time because they are too impractical.

It is hoped that there will be breakthroughs in the implementation of this technology in Europe. In the future, global technology sharing and cooperation may accelerate the popularization of the new generation of bionic prostheses, allowing more amputees to regain "flexible hands" and return to a high-quality life.