The Big Picture
A University of Utah-led research team is taking a major step toward turning science fiction into everyday reality. For the first time, a participant is using Utah’s Luke Skywalker-inspired bionic arm outside the laboratory as part of a yearlong at-home clinical trial.
Alexander “Avi” Davidson can control the neuroprosthetic arm with his thoughts and receive sensory feedback that feels as though it is coming from his missing hand. The technology is allowing him to perform everyday tasks—from opening a can of tuna and playing chess to writing, cooking and holding his wife’s hand—with a level of control and sensation that he has not experienced with other prosthetic devices.
The at-home trial will help researchers understand not only whether the system works, but how it affects independence, function and quality of life over time.
What’s Happening
Davidson lost his left arm below the elbow following an accident at age 16. Seventeen years later, he is the first participant to bring the thought-controlled system home for extended, unsupervised use.
The system combines the commercially available DEKA LUKE Arm with the BIOS Controller, a direct nerve interface developed through years of research at the University of Utah. Implanted devices listen to signals traveling through the nerves and muscles in Davidson’s residual limb. Artificial intelligence translates those signals into movements of the robotic hand, wrist and fingers.
The connection also works in reverse. Sensors in the prosthetic arm send signals back through the nerves to restore a sense of touch, helping Davidson judge pressure, grip strength and whether an object is slipping.
That feedback makes a meaningful difference during routine activities. Davidson can hold a hot cup of coffee while using his phone, pick up an egg without crushing it, manipulate individual chess pieces and open containers with both hands. He described being able to hold his wife’s hand and know how much pressure he is applying as a life-changing experience.
Occupational therapist Leanne Seckinger is helping Davidson integrate the technology into daily life. She said the system supports more natural and efficient movement than other prosthetic devices, while also requiring Davidson to learn a new kind of body language and replace years of muscle memory.
Why It Matters
Advanced robotic arms have existed for years, but controlling them can be cumbersome. Many people with upper-limb loss still rely on body-powered hooks because existing robotic prosthetics may lack intuitive control, dexterity and sensory feedback.
The direct nerve interface is designed to change that experience. Instead of using preset movements or manual adjustments, a user can think about moving a finger or wrist and have the prosthetic respond. Restored sensation can also make delicate or complex tasks safer and more practical.
Moving the research into the home is a critical test. Earlier participants primarily used the technology under the supervision of engineers and clinicians. Researchers can now evaluate how the system performs across a full day, how fatigue and real-world conditions affect its use, and whether it remains useful enough for someone to incorporate into daily life long term.
The potential extends beyond prosthetic arms. Researchers believe the same interface could eventually help people control wheelchairs, exoskeletons, computers, virtual-reality systems and smart-home devices through their intentions. Related research has also explored whether nerve stimulation could help reduce chronic pain and reliance on opioid medications.
The BIOS direct nerve interface received an FDA Breakthrough Device designation in 2024 and was accepted into the agency’s Total Product Lifecycle Advisory Program, which supports promising medical devices as they move toward broader clinical use. The research team plans to continue studying the system with additional participants before expanding to a multisite trial.
The Bottom Line
The first at-home trial marks a shift from proving that thought-controlled prosthetics are technically possible to learning how they can improve real lives.
For Davidson, the impact is already visible in ordinary moments: preparing food, holding a drink, playing a game or feeling his wife’s hand in his. For researchers, those moments offer essential evidence about what the technology must do to become a practical, long-term option for people with limb loss.
The goal is bigger than building a more advanced robotic arm. It is to create a direct connection between the nervous system and technology that restores control, sensation and independence—and opens the door to capabilities once imagined only in science fiction.