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In a world where technological advances often seem reserved for well-funded laboratories, a 17-year-old high school student, Benjamin Choi, has achieved a remarkable feat. He designed a mind-controlled bionic arm using artificial intelligence for a production cost of just 300 dollars. This innovation, which rivals invasive prosthetics costing over 450,000 dollars, could transform the lives of millions of amputees worldwide.
An inspiration born from a documentary
From an early age, Benjamin Choi became passionate about robotics and programming. At age nine, he discovered a 60 Minutes documentary featuring a patient able to control a robotic arm through thought, thanks to sensors implanted in her brain. Fascinated by this technology, he was nonetheless troubled by its limitations: a prohibitive cost and risky brain surgery. As he explained in an interview with Smithsonian Magazine, this discovery planted the seed of an idea that would germinate years later.
In 2020, the COVID-19 pandemic disrupted Choi’s plans, then in 10th grade. Deprived of his research internship on aluminum-based fuels, he decided to devote his free time to developing an affordable and non-invasive prosthetic. Using his sister’s 3D printer, he embarked on creating a prototype that would change the game in the field of neuroprosthetics.
Revolutionary technology
How the bionic arm works
Choi’s bionic arm is based on an innovative approach. Non-invasive electrodes, placed on the forehead, capture residual electrical signals emitted by the brain, particularly in the frontal lobe. These signals, often weak and complex, are analyzed by an algorithm developed by Choi. This algorithm, which comprises over 23,000 lines of code and 900 pages of mathematical calculations, was trained using thousands of brain data points collected during a study approved by an ethics committee (IRB).
The algorithm translates the user’s thoughts into precise commands for the prosthetic arm, enabling movements such as raising the hand, grasping objects, or even playing table tennis. Unlike traditional prosthetics, this system requires no surgical intervention, which reduces risks and costs. Furthermore, the arm, manufactured using a 3D printer, is lightweight, durable and incredibly economical, with a production cost under 300 dollars.
Comparison with existing prosthetics
| Feature | Choi’s bionic arm | Traditional invasive prosthetics |
|---|---|---|
| Cost | ~$300 | >$450,000 |
| Invasiveness | Non-invasive (electrodes on forehead) | Brain surgery required |
| Precision | Comparable to high-end models | Very high |
| Accessibility | Highly accessible | Limited by cost and risks |
| Durability | Lightweight and durable | Variable depending on model |
As reported by Scholastic Science World Magazine, Choi’s algorithm achieves 95% accuracy in less than one second, rivaling invasive prosthetics. This performance, combined with its affordable cost, makes this invention a viable alternative for millions of people.
Impact and global reach
With over 30 million amputees worldwide, according to Scholastic Science World Magazine, access to advanced prosthetics remains a major challenge. Current solutions, while technologically impressive, are often inaccessible due to their price and associated medical risks. By eliminating these barriers, Choi’s bionic arm could democratize access to cutting-edge prosthetics, offering new independence to those who need it.
Moreover, this invention illustrates the potential of AI in healthcare. While companies like Neuralink explore brain-computer interfaces, Choi’s approach stands out for its simplicity and accessibility.
Recognition and future
Choi’s work has been widely recognized. He won the Grand Prize in Biomedical Engineering in a 3D printing competition organized by polySpectra.
Currently, Choi is continuing his research as a quantitative research intern at The D.E. Shaw Group, as indicated on his LinkedIn profile. He is also working on machine learning projects, which suggests more innovations to come.
Benjamin Choi embodies the spirit of innovation and perseverance. At just 17 years old, he has created a prosthetic that not only pushes technological boundaries but also makes this technology accessible to all. His mind-controlled bionic arm is striking proof that AI, combined with a humanistic vision, can transform lives. As the healthcare sector continues to evolve, young talents like Choi are showing the way toward a future where advanced medical technologies are within everyone’s reach.
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