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A groundbreaking prosthetic limb is transforming mobility for amputees. Developed by researchers at Johns Hopkins University’s Applied Physics Laboratory in collaboration with the Canadian robotics firm ThalmicLabs, this non-invasive prosthetic arm is controlled directly by the user’s thoughts.
The Modular Prosthetic Arm integrates with two Myo armbands—a $200 wearable device initially created for gesture-based computer and gaming control. These wireless bands detect electrical activity in the arm muscles, enabling users to operate the prosthetic naturally. Whether picking up objects or moving fingers, the prosthetic responds as if it were a real limb. Electromyography signals are transmitted wirelessly to a computer, processed, and then relayed to the prosthetic to activate specific joints.
In 2015, researchers in California successfully programmed a robotic arm for a paralyzed individual to control mentally, enabling him to drink a beer independently. However, this method involved brain-implanted electrodes. In contrast, the Myo-controlled prosthetic requires only an armband, offering a non-invasive solution.
In the video, Johnny Matheny, the patient, has his prosthetic surgically connected to his upper arm. This bone-anchored implant reduces common issues like sweating and chafing, providing a broader range of motion, including reaching overhead and behind his back. Using the Myo-enabled prosthetic, he can manipulate individual fingers, grip objects, and move his wrist by activating the muscles in his residual limb.
"The APL arm is the most extraordinary prosthetic I’ve ever used," Matheny remarks in the video. "It replicates the full functionality of a natural hand, wrist, elbow, and shoulder."
While the system isn’t yet ready for daily use—Matheny currently uses it only in lab settings—the research team aims to make it widely accessible in the future.
