A prototype 3D-printed myoelectric prosthetic hand developed in Japan successfully passed a test by an upper-arm amputee, performing a series of intricate finger motions with more than 90% accuracy.

Dr. Micahel Kwast, of iChiro Clinics and Peak Performance Integrated Medicine, says range-of-motion testing is getting a lot of attention lately for its ability to stave off injury. Dr. Kwast said the ...