In this experiment, the researchers used wires to connect a prosthetic arm to chip’s placed on the patient’s motor cortex, responsible for movement, and sensory cortex, where the brain compiles sensory information. The prosthetic hand contains torque sensors that can detect minute changes in pressure. Once the brain and arm were hooked up, the researchers blindfolded the patient, then gently touched each of the prosthetic fingers. The patient was able to identify when the hand was touched, and which finger, with nearly 100 percent accuracy. He said he felt as if his own hand was being touched, according to the press release.