Photo: Matt Rourke/AP Photo
The Touch Bionics i-Limb Ultra Revolution hands worn by double amputee Jason Koger give him the ability to gradually increase the grip strength of each finger. This allows him to cradle an egg without breaking it or grab the handle of a heavy bag without worrying that it will slip from his grasp. The software-controlled prostheses offer a wide selection of automated grips and gestures. The user manipulates the limbs using the Biosim-i app on a mobile device. The Biosim settings and commands—including user-created gestures—are then sent to the hands via Bluetooth.