Researchers trained the rats by making them tow the car, motors turned off, around an enclosed area. A camera tracked the rats' movement and fed data into a modeling program, which pieced together signals from the motor cortex. Then, the rats were hung from the car so their limbs barely touched the floor. The researchers switched the motors on, and as they tried to move, their neural signals were used to drive the car. Six out of eight rats adapted well and were able to get around with the car, according to IEEE Spectrum.