The creation of a degree of control over electromechanical prosthesis in severely disabled spinal injury patients or loss-of-limb patients is a major challenge for the medical industry. Researchers at Utah University have succeeded in interfacing the human brain with a brain implant which, connected through an electronic control system, is being used to manipulate computers and prosthetic appendages. Micro needle sensor arrays are made by micro Electrical Discharge Machining (EDM) of a tungsten work piece.