To study the information of 3 major nerves and the feasibility of nerve-signal controlled prosthesis after implantation of intrafascicular electrodes in the ulnar, radial, median nerve of upper arm in amputee volunteer.

• 在残肢志愿受试者上臂尺、桡、正中神经植入神经束内电极，研究三大主要神经的神经信息和神经信息控制假肢的可行性。